Call Progress Tone and Ringing Signal Generation

Size: px
Start display at page:

Download "Call Progress Tone and Ringing Signal Generation"

Transcription

1 Exercise 1-3 Call Progress Tone and Ringing Signal Generation EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with call progress tone and ringing signal generation. DISCUSSION Introduction As discussed in the DISCUSSION OF FUNDAMENTALS of this unit, a dialog must be engaged between the call processor and the subscriber before a connection can be established. In the previous exercise, you saw how a telephone number dialed by a subscriber is transmitted to the call processor. In this exercise, you will see how the call processor generates messages (i.e. call progress tones) and sends them to the subscriber to give him, or her, feed back on how his service request is being processed. Call Progress Tone Generation A tone generator in each service circuit of the signaling circuit is used to generate analog call progress tones. The call progress tone generated depends on data sent to the tone generator by the call processor. Table 1-1 gives the frequency components and on/off modulation intervals of the main call progress tones used in North America. Note that progress tones differ from one country to another. Call Progress Tone Frequency Components (Hz) On/Off Modulation Intervals Meaning Dial 350 and 440 continuous dialing can begin Busy 480 and s ON, 0.5 s OFF called line busy Receiver off-hook * 1400, 2060, 2450 and s ON, 0.1 s OFF telephone handset is off-hook Ring back 440 and s ON, 4 s OFF called subscriber's telephone set is ringing * The receiver off-hook tone is a warning signal. The signal is loud to get the attention of someone to hang up the receiver. Table 1-1. Call progress tones for North America. 1-37

2 A special information tone (SIT) is used in North America and many European countries to indicate to a subscriber that the called number is not a working number. The special information tone consists of a cadenced sequence of three frequencies as shown in Figure 1-9. In the United States, one cycle of the SIT is often sent before a pre-recorded announcement that gives more details about the problem. In the Telephony Training System, the SIT consists of a single cycle of the three frequencies shown in Figure 1-9 without announcement. 900 Hz 1400 Hz 1800 Hz 900 Hz 1400 Hz ETC s 0.33 s 0.33 s 1.0 s 0.33 s 0.33 s Figure 1-9. Special information tone. In the UK and countries following British telecommunication practices, the "number unobtainable tone" is used when the dialed number is not a working number. In the UK, this tone is continuous while in other countries, it is on/off modulated. Figure 1-10 shows a simplified diagram of the circuitry involved in the generation and transmission of call progress tones. Each analog call progress tone generated by the tone generator is converted to digital form and multiplexed in time by the CODEC and TSAC of the service circuit. The digitized and multiplexed tone is then routed to the telephone set of the subscriber who made the service request, via the switching circuit of the central office and the corresponding analog line interface. This is done by connecting the TX line of the service circuit (TX1 in Figure 1-10) to the RX line of the analog line interface (RX0 in Figure 1-10). 1-38

3 ANALOG LINE INTERFACE SWITCHING CIRCUIT T TX TX0 RX0 ANALOG TELEPHONE SET SLIC CODEC RX TX1 RX1 R TSAC SIGNALING CIRCUIT SERVICE CIRCUIT TX TONE GENERATOR A CODEC FROM CALL PROCESSOR RX DTMF DETECTOR B TSAC A B FROM CALL PROCESSOR TO CALL PROCESSOR FROM CALL PROCESSOR Figure Simplified diagram of the circuitry involved in the generation and transmission of call progress tones. The CODEC in the analog line interface demultiplexes the digitized call progress tone and converts it to analog form before it is sent to the SLIC which routes this signal to the telephone line. Notice that the path followed by call progress tones is somewhat the inverse path to the one followed by the DTMF dialing signals coming from the telephone set (compare the paths shown in Figures 1-7 and 1-10). Notice that as soon as the handset of a telephone set is lifted off the cradle, a service request is detected in the central office which immediately reacts by connecting the TX line of a service circuit to the RX line of the corresponding line interface via the switching circuit. This connection is released as soon as the call processor detects that the subscriber hangs up or the communication is established. Subscriber signaling for analog telephone sets is part of a general form of signaling referred to as in-band signaling. In-band signaling refers to signaling systems using audio tones (single frequency, two frequencies and multiple frequencies) whose frequencies are inside the conventional voice channel band (between 300 Hz to 1-39

4 3400 Hz), to convey signaling information. This allows voice channels (e.g. the SLIC and CODEC in analog line interfaces) to be used to carry signaling signals. Singlefrequency and two-frequency signaling systems use the to 3000-Hz portion, where less speech energy is concentrated. Ringing Signal Generation The ring generator provides the AC ringing voltage used to make analog telephone sets ring. The ring generator is part of the signaling circuit. Its output is connected to the ring relay of each analog line interface. In modern central offices, the ring generator output signal frequency and level are programmable via the call processor. This allows the equipment to comply with local standards for ringing signals. Procedure summary In the first part of the exercise, you will set up a central office with the Telephony Training System (TTS). In the second part of the exercise, you will determine how the call progress tones produced by a SERVICE CIRCUIT in the SIGNALING CIRCUIT of the Central Office are routed to a telephone set. In the third part of the exercise, you will measure the modulation intervals and the frequency components of basic call process tones, using the Oscilloscope and the Spectrum Analyzer. In the last part of the exercise, you will set the level and frequency of the RING GENERATOR output voltage at different values and observe the corresponding changes that occur in this voltage on the Oscilloscope screen. This will allow you to see that this voltage can be programmed to comply with local standards. EQUIPMENT REQUIRED Refer to Appendix A of this manual to obtain the list of equipment required to perform this exercise. PROCEDURE Setting Up the Central Office * 1. Make sure that the Reconfigurable Training Module, Model 9431, is connected to the TTS Power Supply, Model Make sure that there is a network connection between the Reconfigurable Training Module and the host computer. 1-40

5 Install the Dual Analog Line Interface, Model 9475, into one of the analog/digital (A/D) slots of the Reconfigurable Training Module. Connect two analog telephone sets to the Dual Analog Line Interface. Make sure that the tone dialing mode is selected on each analog telephone set. CAUTION! High voltages are present on the standard telephone connectors of the Dual Analog Line Interface. Do not connect or disconnect the analog telephone sets when the Reconfigurable Training Module is turned on. Connect the AC/DC power converter supplied with each analog telephone set to one of the AC power outlets on the TTS Power Supply. Connect the DC power output jack of each AC/DC power converter to the DC power input connector on either of the analog telephone sets. Note: The analog telephone set requires an auxiliary DC power source for the digital display to be operative. * 2. Turn on the host computer. Turn on the TTS Power Supply, then the Reconfigurable Training Module. * 3. On the host computer, start the Telephony Training System software, then download the CO program to the Reconfigurable Training Module. The CO program configures the Reconfigurable Training Module so that it operates as a central office. Note: If the host computer is unable to download the CO program to the Reconfigurable Training Module, it may not be using the proper IP address. Have your instructor check if the computer is using the proper IP address to communicate with the Reconfigurable Training Module. * 4. On the host computer, set the address of the TSAC of SERVICE CIRCUIT 1 in the SIGNALING CIRCUIT to 03. Routing of the Call Progress Tones from a Service Circuit to a Telephone Set * 5. Connect Oscilloscope Probes 1 and 2 to TP4 (TONE GENERATOR output) and TP2 (TX1 line) of the SIGNALING CIRCUIT. Connect Oscilloscope Probes 3 and 4 to TP8 (CODEC demultiplexed PCM output) and TP17 (FRAME SYNC. signal) of ANALOG LINE INTERFA- CE A. 1-41

6 * 6. Start the Oscilloscope. Make the following settings on the Oscilloscope: Channel 1 Mode Normal Sensitivity V/div Input Coupling DC Channel 2 Mode Normal Sensitivity V/div Input Coupling DC Channel 3 Mode Normal Sensitivity V/div Input Coupling DC Channel 4 Mode Normal Sensitivity V/div Input Coupling DC Time Base ms/div Trigger Source Ch 1 Level V Slope positive (+) Display Refresh Continuous * 7. Lift off the handset of telephone set A and listen to the dial tone in the handset earpiece of telephone set A. On the Oscilloscope screen, observe the waveform of the analog dial tone signal at TP4 of the SIGNALING CIRCUIT. This tone is produced by the TONE GENERATOR of SERVICE CIRCUIT 1 to indicate that dialing can begin. Replace the handset of telephone set A on the cradle. * 8. Lift off the handset of telephone set A while observing the Oscilloscope screen. Observe that PCM codes appear in the signal at TP2 (TX1 line) of the SIGNALING CIRCUIT. Replace the handset of telephone set A on the cradle. What do these PCM codes represent? 1-42

7 * 9. Make the following settings on the Oscilloscope: Time Base µs/div Trigger Source Ch 4 Level V Lift off the handset of telephone set A. On the Oscilloscope screen, observe the relationship between the PCM signals at TP8 (CODEC demultiplexed PCM output) of ANALOG LINE INTERFACE A and TP2 (TX1 line) of SERVICE CIRCUIT 1. Replace the handset of telephone set A on the cradle. What relationship did you notice between the PCM signals? What does this indicate? * 10. Disconnect Probe 4 from TP17 of ANALOG LINE INTERFACE A, then connect it to TP7 (CODEC analog output) of this interface. Make the following settings on the Oscilloscope: Channel 4 Sensitivity V/div Time Base ms/div Trigger Source Ch 1 Level V Lift off the handset of telephone set A. On the Oscilloscope screen, observe the relationship between the signals at TP7 (CODEC analog output) of ANALOG LINE INTERFACE A and TP4 (TONE GENERATOR output) of SERVICE CIRCUIT 1. Replace the handset of telephone set A on the cradle. What relationship did you notice between the two signals? What does this indicate? * 11. Lift off the handset of telephone set A and dial the number of telephone set B. 1-43

8 The ring back tone can now be heard in the handset earpiece of telephone set A, indicating that telephone set B is ringing. Do not answer the call. Observe the signals on the Oscilloscope screen. What is the relationship between these signals? What does this indicate? Replace the handset of telephone set A on the cradle. On the Oscilloscope, select the manual display refresh mode. * 12. Adjust the view in order to be able to simultaneously observe the TIME SLOT NUMBER displays of ANALOG LINE INTERFACE A and SERVICE CIRCUIT 1 in the SIGNALING CIRCUIT. Open a second window to display the SPACE-DIVISION SWITCH and the TIME SLOT SELECTOR of the SWITCHING CIRCUIT. Set the TIME SLOT SELECTOR to 03. This will enable display of the connections made by the SPACE-DIVISION SWITCH during time slot 3. * 13. Lift off the handset of telephone set A and dial the number of telephone set B. While telephone set B is ringing, observe the TSAC TX TIME SLOT NUMBER display of SERVICE CIRCUIT 1, the connection made by the SPACE-DIVISION SWITCH of the SWITCHING CIRCUIT, and the TSAC RX TIME SLOT NUMBER display of ANALOG LINE INTERFACE A. Which time slot is assigned to SERVICE CIRCUIT 1 for transmission of multiplexed, digitized call progress tones to ANALOG LINE INTER- FACE A? What connection is made by the SPACE-DIVISION SWITCH during time slot 3? 1-44

9 Which time slot is assigned to ANALOG LINE INTERFACE A for reception of multiplexed, digitized call progress tones? Why? * 14. While observing the SPACE-DIVISION SWITCH, lift off the handset of telephone set B to answer the call and establish a communication. What happens to the connection made by this switch? Replace the handsets of telephone sets A and B on their cradle. * 15. From the observations you have made up to this point, explain how call progress tones produced by the TONE GENERATOR of a SERVICE CIRCUIT are routed to a telephone set. Note: The operation of the SPACE-DIVISION SWITCH of the SWITCHING CIRCUIT will be covered in detail in Exercise 2-2. Close the window that displays the SPACE-DIVISION SWITCH and the TIME SLOT SELECTOR of the SWITCHING CIRCUIT. Modulation Intervals and Frequency Components of Basic Call Progress Tones * 16. Disconnect all the Oscilloscope Probes. Connect Oscilloscope Probe 1 and the Spectrum Analyzer Probe to TP4 (TONE GENERATOR output) of the SIGNALING CIRCUIT. * 17. Set the Oscilloscope time base to 5 ms/div. 1-45

10 * 18. Start the Spectrum Analyzer. Make the following settings on the Spectrum Analyzer: Center Frequency Hz Frequency Span Hz/div Amplitude Scale Log Maximum Input dbv Display Refresh Manual * 19. Have each of the call progress tones listed in Table 1-2 produced at the TONE GENERATOR output (TP4) of SERVICE CIRCUIT 1. For each tone, measure the approximate ON and OFF modulation intervals, using the Oscilloscope if necessary. Also, measure the frequency of each component in the spectrum of the tone, using the Spectrum Analyzer. (To get an accurate measurement of the frequency of the spectral components in the tone, it might be necessary to refresh the Spectrum Analyzer display several times until the peaks in the spectrum are well defined.) Record your results in Table 1-2. Note: To prevent the sampling time of the LVTTS instruments from being too long, reduce the Oscilloscope time base. This is particularly important when observing the frequency spectrum of the busy and receiver off-hook (ROH) tones. Use the following steps to produce the tones at TP4 of SERVICE CIRCUIT 1: Dial tone: Lift off the handset of telephone set A. Ring back tone: Lift off the handset of telephone set A and dial the number of telephone set B to make it ring. Busy tone: Lift off the handset of telephone set A, then lift off the handset of telephone set B. On the keypad of telephone set A, dial the number of telephone set B. Receiver off-hook tone: Lift off the handset of telephone set A and wait until the dial tone changes to the receiver off-hook tone. (On the Spectrum Analyzer, increase the Center Frequency to 1800 Hz and the Frequency Span to 200 Hz/div.) 1-46

11 CALL PROGRESS TONE Dial Ring back Busy Receiver off-hook ON (s) MODULATION INTERVALS OFF (s) FREQUENCY OF SPEC- TRAL COMPONENTS (Hz) Table 1-2. Modulation intervals and frequency components of the basic call progress tones. Replace the handset of each telephone set on the cradle. * 20. Lift off the handset of telephone set A. Dial a telephone number which is not that of telephone set B and listen to the special information tone (SIT) in the handset earpiece of telephone set A. Replace the handset of telephone set A on the cradle. What does the SIT consist of? What does it indicate? Close the Spectrum Analyzer. Changing the RING GENERATOR Output Voltage and Frequency * 21. Disconnect Oscilloscope Probe 1 and the Spectrum Analyzer Probe from TP4 of SERVICE CIRCUIT 1. Connect Oscilloscope Probe 1 to TP1 (RING GENERATOR output) of the SIGNALING CIRCUIT. * 22. Make the following settings on the Oscilloscope: Channel 1 Sensitivity V/div Input Coupling AC Time Base ms/div Display Refresh Continuous * 23. The RING GENERATOR output voltage should now be displayed on the Oscilloscope screen. 1-47

12 Record below the RMS value and frequency of this voltage, as indicated on the Oscilloscope. RING GENERATOR RMS output voltage: V RING GENERATOR output voltage frequency: Hz * 24. On the host computer, set the RING GENERATOR output voltage to different values. After each new setting, observe the change in the RING GENERATOR output voltage on the Oscilloscope screen. Also, set the frequency of the RING GENERATOR output voltage to different values. After each new setting, observe the change in the frequency of the RING GENERATOR output voltage on the Oscilloscope screen. From your observations, can the level and frequency of the RING GENERATOR output voltage be programmed to comply with various local standards for ringing signals? Explain. * 25. On the host computer, close the Telephony Training System software. Turn off the TTS Power Supply, as well as the host computer (if it is no longer required). Disconnect the AC/DC power converters from the TTS Power Supply and the analog telephone sets. Disconnect the analog telephone sets from the Dual Analog Line Interface. Remove the Dual Analog Line Interface from the Reconfigurable Training Module. CONCLUSION In this exercise, you familiarized yourself with the generation of call progress tones and ringing signals. You learned that call progress tones are generated by tone generators in the service circuits of the signaling circuit. You learned that each call progress tone is digitized and time multiplexed by the CODEC and TSAC of the service circuit, and that it is routed to the telephone set of the subscriber who made the service request, via the switching circuit of the central office and the corresponding line interface. In fact, the path followed by the call progress tones is somewhat the inverse of the path followed by the analog DTMF dialing signals. You also saw that each call progress tone has its own frequency components and on/off 1-48

13 modulation intervals. Finally, you learned that the AC ringing signal used to make the telephone sets ring has a sinusoidal waveform and is produced by a ring generator located in the signaling circuit. You saw that, in the Telephony Training System, the RING GENERATOR output voltage level and frequency can be programmed to meet the requirements of local telephone standards. REVIEW QUESTIONS 1. What is the purpose of the call progress tones generated by the tone generators in the service circuits of the signaling circuit? 2. In North America and European countries that follow North American practices, under which condition will a special information tone (SIT) be sent to the subscriber? 3. Compare the path followed by the call progress tones produced by a service circuit to reach a telephone set with the path followed by the DTMF dialing signals coming from this telephone set to reach the service circuit. 4. Briefly describe what in-band signaling is. 5. What is the function of the ring generator in the signaling circuit? To which device of the line interfaces is the ring generator output intended to be connected? 1-49

EXERCISE OBJECTIVE DISCUSSION Introduction 2-31

EXERCISE OBJECTIVE DISCUSSION Introduction 2-31 Exercise 2-3 Two-Dimensional Switching EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with two-dimensional switching. DISCUSSION Introduction The first two exercises of

More information

Exercise 1-4. Pulse Dialing

Exercise 1-4. Pulse Dialing Exercise 1-4 Pulse Dialing When you have completed this exercise, you will be able to demonstrate pulse dialing, an older signaling technique to transmit telephone numbers to central offices using a series

More information

Exercise 1-1. Architecture of a Digital PABX EXERCISE OBJECTIVE

Exercise 1-1. Architecture of a Digital PABX EXERCISE OBJECTIVE Exercise 1-1 Architecture of a Digital PABX EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with the architecture of a digital PABX (the Lab-Volt PABX). You will be able

More information

Exercise 2-1. Battery Feed Power Supply

Exercise 2-1. Battery Feed Power Supply Exercise 2-1 Battery Feed Power Supply When you have completed this exercise, you will be able to demonstrate how the central office supplies power to analog telephone sets. A telephone set requires electrical

More information

Faculty of Engineering Electrical Engineering Department Communication Engineering I Lab (EELE 3170) Eng. Adam M. Hammad

Faculty of Engineering Electrical Engineering Department Communication Engineering I Lab (EELE 3170) Eng. Adam M. Hammad Faculty of Engineering Electrical Engineering Department Communication Engineering I Lab (EELE 3170) Eng. Adam M. Hammad EXPERIMENT #2 UNDERSTANDING TELEPHONE BASICS Telephone components: 1. Handset containing

More information

MEGAPLEX-2100 MODULE VC-16A. 16-Channel PCM/ADPCM Voice Module Installation and Operation Manual. Notice

MEGAPLEX-2100 MODULE VC-16A. 16-Channel PCM/ADPCM Voice Module Installation and Operation Manual. Notice MEGAPLEX-2100 MODULE VC-1A 1-Channel PCM/ADPCM Voice Module Installation and Operation Manual Notice This manual contains information that is proprietary to RAD Data Communications No part of this publication

More information

Exercise 2-1. PAM Signals EXERCISE OBJECTIVE DISCUSSION OUTLINE. Signal sampling DISCUSSION

Exercise 2-1. PAM Signals EXERCISE OBJECTIVE DISCUSSION OUTLINE. Signal sampling DISCUSSION Exercise 2-1 PAM Signals EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with the generation of both natural and flat-top sampled PAM signals. You will verify how the frequency

More information

Exercise 4. Angle Tracking Techniques EXERCISE OBJECTIVE

Exercise 4. Angle Tracking Techniques EXERCISE OBJECTIVE Exercise 4 Angle Tracking Techniques EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with the principles of the following angle tracking techniques: lobe switching, conical

More information

TSA 6000 System Features Summary

TSA 6000 System Features Summary 2006-03-01 1. TSA 6000 Introduction... 2 1.1 TSA 6000 Overview... 2 1.2 TSA 6000 Base System... 2 1.3 TSA 6000 Software Options... 2 1.4 TSA 6000 Hardware Options... 2 2. TSA 6000 Hardware... 3 2.1 Signal

More information

Exercise 8. Troubleshooting a Radar Target Tracker EXERCISE OBJECTIVE

Exercise 8. Troubleshooting a Radar Target Tracker EXERCISE OBJECTIVE Exercise 8 Troubleshooting a Radar Target Tracker EXERCISE OBJECTIVE When you have completed this exercise, you will be able to apply an efficient troubleshooting procedure in order to locate instructor-inserted

More information

TLS-3A. Telephone Line Simulator. User Manual , Rev. B Covers Model TLS-3A-01

TLS-3A. Telephone Line Simulator. User Manual , Rev. B Covers Model TLS-3A-01 User Manual TLS-3A Telephone Line Simulator 40-400-00010, Rev. B Covers Model TLS-3A-01 Teltone Corporation 22121-20th Avenue SE Bothell, Washington 98021-4408 USA Phone: 1-800-426-3926 or 425-487-1515

More information

Version 9.3. SmartPTT Enterprise. Release Notes

Version 9.3. SmartPTT Enterprise. Release Notes Version 9.3 June 2018 New Features 2 New Features Backhaul Repeater Chains supports the Backhaul Repeater Chains (BRC) feature in digital conventional radio systems. Both legacy IP Site Connect and IP

More information

MTI 7601 PAM Modulation and Demodulation

MTI 7601 PAM Modulation and Demodulation Page 1 of 1 MTI 7601 PAM Modulation and Demodulation Contents Aims of the Exercise Learning about the functioning principle of the pulse-amplitude modulation (sampling, time division multiplex operation)

More information

The Discussion of this exercise covers the following points: Filtering Aperture distortion

The Discussion of this exercise covers the following points: Filtering Aperture distortion Exercise 3-1 PAM Signals Demodulation EXERCISE OBJECTIVE When you have completed this exercise you will be able to demonstrate the recovery of the original message signal from a PAM signal using the PAM

More information

Engineering Order Wire Implementation

Engineering Order Wire Implementation International Journal of Engineering and Technology Volume 3 No. 2, February, 2013 Engineering Order Wire Implementation Chittajit Sarkar Swami Vivekananda Institute of Science and Technology West Bengal

More information

Communication Systems Lab

Communication Systems Lab LAB MANUAL Communication Systems Lab (EE-226-F) Prepared by: Varun Sharma (Lab In-charge) Dayal C. Sati (Faculty In-charge) B R C M CET BAHAL DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING Page

More information

The Single-Phase PWM Inverter with Dual-Polarity DC Bus

The Single-Phase PWM Inverter with Dual-Polarity DC Bus Exercise 2 The Single-Phase PWM Inverter with Dual-Polarity DC Bus EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with the singlephase PWM inverter with dual-polarity dc

More information

Part IV: Glossary of Terms

Part IV: Glossary of Terms Issue 9 November 2004 Spectrum Management and Telecommunications Policy Compliance Specification for Terminal Equipment, Terminal Systems, Network Protection Devices, Connection Arrangements and Hearing

More information

Hewlett-Packard Company 1995

Hewlett-Packard Company 1995 Using off-the-shelf parts and a special interface ASIC, an I/O card was developed that provides voice, fax, and data transfer via a telephone line for the HP 9000 Model 712 workstation. AT Hewlett-Packard

More information

Smoking and any food or drinks are not permitted in the Applications Lab!

Smoking and any food or drinks are not permitted in the Applications Lab! Pre-Lab Activities: None 220 Lab A Electrical Properties of Transmission Systems and the Local Loop Purpose of the experiment: Experiment with a telephone and view its properties under various different

More information

Signalling In Telecom

Signalling In Telecom Signalling In Telecom Venkat Chowdary Mannava, Final Year BTech, K.L.University. M. Satya Manohar Raju,Final Year BTech,K.L.University. T. Ravi MTech(Ph.D) ABSTRACT: This handout discusses the growth of

More information

VC-6 6-Channel PCM Voice Module MEGAPLEX-2100 MODULE

VC-6 6-Channel PCM Voice Module MEGAPLEX-2100 MODULE Installation and Operation Manual VC-6 6-Channel PCM Voice Module MEGAPLEX-2100 MODULE MEGAPLEX-2100 MODULE VC-6 6-Channel PCM Voice Module Installation and Operation Manual Notice This manual contains

More information

TELEPHONE TRANSMISSION SYSTEMS. ETI 2506 Telecommunication Systems

TELEPHONE TRANSMISSION SYSTEMS. ETI 2506 Telecommunication Systems TELEPHONE TRANSMISSION SYSTEMS ETI 2506 Telecommunication Systems 1 BASIC ANALOGUE TELEPHONE Earphone (earpiece) The moving diaphragm produces varying sound that corresponds to the sound waves that were

More information

Department of Electronics & Telecommunication Engg. LAB MANUAL. B.Tech V Semester [ ] (Branch: ETE)

Department of Electronics & Telecommunication Engg. LAB MANUAL. B.Tech V Semester [ ] (Branch: ETE) Department of Electronics & Telecommunication Engg. LAB MANUAL SUBJECT:-DIGITAL COMMUNICATION SYSTEM [BTEC-501] B.Tech V Semester [2013-14] (Branch: ETE) KCT COLLEGE OF ENGG & TECH., FATEHGARH PUNJAB TECHNICAL

More information

Part VI: Requirements for Integrated Services Digital Network Terminal Equipment

Part VI: Requirements for Integrated Services Digital Network Terminal Equipment Issue 9, Amendment 1 September 2012 Spectrum Management and Telecommunications Compliance Specification for Terminal Equipment, Terminal Systems, Network Protection Devices, Connection Arrangements and

More information

OUTLINE OF AUTOMATIC STEP BY STEP SYSTEM. The Telephone Dial 3. Subscribers' Calling Equipment 11. Typical Numbering Scheme 14

OUTLINE OF AUTOMATIC STEP BY STEP SYSTEM. The Telephone Dial 3. Subscribers' Calling Equipment 11. Typical Numbering Scheme 14 P.O. ENGINEERING DEPARTMENT EDUCATIONAL PAMPHLET - DRAFT SERIES TELEPHONES 3/1 OUTLINE OF AUTOMATIC STEP BY STEP SYSTEM CONTENTS Page Introduction 1 The Telephone Dial 3 The Selector 4 Switching Arrangements

More information

ACCESS CONTROL CENTER RADIO ACCESS SYSTEM INTERCONNECTION

ACCESS CONTROL CENTER RADIO ACCESS SYSTEM INTERCONNECTION ACCESS CONTROL CENTER RADIO ACCESS SYSTEM INTERCONNECTION Model ACC2500 Desktop System Controller Existing PBX or PSTN Extension or Trunk Port No. 12612-002 Interface Assembly Customer-provided Cat 5e/6

More information

Contents 1. FEATURES EQUIPMENT DESCRIPTION INSTALLATION OPERATION TROUBLESHOOTING SPECIFICATIONS...

Contents 1. FEATURES EQUIPMENT DESCRIPTION INSTALLATION OPERATION TROUBLESHOOTING SPECIFICATIONS... Contents 1. FEATURES... 3 2. EQUIPMENT DESCRIPTION... 3 3. INSTALLATION... 5 4. OPERATION... 5 5. TROUBLESHOOTING... 7 6. SPECIFICATIONS... 8 2 1. FEATURES Telephone Foreign Exchange Subscriber (FXS) Service:

More information

AM48 XT & AM48e XT Family of Products

AM48 XT & AM48e XT Family of Products AM48 XT & AM48e XT Family of Products AM-44 XT The AM-4 Series of Hand-Held Transmission Test Sets There are four models in the AM-4 series family. They are AM-44 XT and AM-48 XT which comply with Bell

More information

Exercise 6. Range and Angle Tracking Performance (Radar-Dependent Errors) EXERCISE OBJECTIVE

Exercise 6. Range and Angle Tracking Performance (Radar-Dependent Errors) EXERCISE OBJECTIVE Exercise 6 Range and Angle Tracking Performance EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with the radardependent sources of error which limit range and angle tracking

More information

Frequency Agility and Barrage Noise Jamming

Frequency Agility and Barrage Noise Jamming Exercise 1-3 Frequency Agility and Barrage Noise Jamming EXERCISE OBJECTIVE To demonstrate frequency agility, a radar electronic protection is used against spot noise jamming. To justify the use of barrage

More information

UCE-DSO212 DIGITAL OSCILLOSCOPE USER MANUAL. UCORE ELECTRONICS

UCE-DSO212 DIGITAL OSCILLOSCOPE USER MANUAL. UCORE ELECTRONICS UCE-DSO212 DIGITAL OSCILLOSCOPE USER MANUAL UCORE ELECTRONICS www.ucore-electronics.com 2017 Contents 1. Introduction... 2 2. Turn on or turn off... 3 3. Oscilloscope Mode... 4 3.1. Display Description...

More information

- 1 - Rep. ITU-R M.2009 REPORT ITU-R M.2009 DIRECT-DIAL TELEPHONE SYSTEMS FOR THE MARITIME MOBILE SERVICE

- 1 - Rep. ITU-R M.2009 REPORT ITU-R M.2009 DIRECT-DIAL TELEPHONE SYSTEMS FOR THE MARITIME MOBILE SERVICE - 1 - REPORT ITU-R M.2009 DIRECT-DIAL TELEPHONE SYSTEMS FOR THE MARITIME MOBILE SERVICE (1995) General Although the DSC system may be used to establish fully automatic systems in the directions ship-to-shore,

More information

2 Oscilloscope Familiarization

2 Oscilloscope Familiarization Lab 2 Oscilloscope Familiarization What You Need To Know: Voltages and currents in an electronic circuit as in a CD player, mobile phone or TV set vary in time. Throughout the course you will investigate

More information

Communications Technologies Training Systems

Communications Technologies Training Systems Communications Technologies Training Systems LabVolt Series Datasheet Festo Didactic en 220 V - 60 Hz 04/208 Table of Contents General Description 2 Detailed Screenshots of the Application 3 Topic Coverage

More information

Exercise 4. Ripple in Choppers EXERCISE OBJECTIVE DISCUSSION OUTLINE DISCUSSION. Ripple

Exercise 4. Ripple in Choppers EXERCISE OBJECTIVE DISCUSSION OUTLINE DISCUSSION. Ripple Exercise 4 Ripple in Choppers EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with ripple in choppers. DISCUSSION OUTLINE The Discussion of this exercise covers the following

More information

Exercise 6. The Boost Chopper EXERCISE OBJECTIVE DISCUSSION OUTLINE DISCUSSION. The boost chopper

Exercise 6. The Boost Chopper EXERCISE OBJECTIVE DISCUSSION OUTLINE DISCUSSION. The boost chopper Exercise 6 The Boost Chopper EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with the operation of the boost chopper. DISCUSSION OUTLINE The Discussion of this exercise covers

More information

Understanding PMC Interactions and Supported Features

Understanding PMC Interactions and Supported Features CHAPTER3 Understanding PMC Interactions and This chapter provides information about the scenarios where you might use the PMC, information about the server and PMC interactions, PMC supported features,

More information

MTI 7602 PCM Modulation and Demodulation

MTI 7602 PCM Modulation and Demodulation Page 1 of 1 MTI 7602 PCM Modulation and Demodulation Contents Aims of the Exercise Learning about the functioning principle of the pulse-code modulation (quantisation, coding, time division multiplex operation)

More information

Digital Fundamentals 8/25/2016. Summary. Summary. Floyd. Chapter 1. Analog Quantities

Digital Fundamentals 8/25/2016. Summary. Summary. Floyd. Chapter 1. Analog Quantities 8/25/206 Digital Fundamentals Tenth Edition Floyd Chapter Analog Quantities Most natural quantities that we see are analog and vary continuously. Analog systems can generally handle higher power than digital

More information

EE-4022 Experiment 2 Amplitude Modulation (AM)

EE-4022 Experiment 2 Amplitude Modulation (AM) EE-4022 MILWAUKEE SCHOOL OF ENGINEERING 2015 Page 2-1 Student objectives: EE-4022 Experiment 2 Amplitude Modulation (AM) In this experiment the student will use laboratory modules to implement operations

More information

Xen IPK II ANALOGUE TELEPHONE User Guide

Xen IPK II ANALOGUE TELEPHONE User Guide Xen IPK II ANALOGUE TELEPHONE User Guide Table of Contents General Information............................... 3 Answering Calls.................................. 3 Making Calls.....................................

More information

Line Signalling Fundamentals

Line Signalling Fundamentals Line Signalling Fundamentals Introduction This document refers to the types of signalling provided by and large by the PRX in its various forms across the range of delivered systems. Some of the concepts

More information

Installation and Operation Manual VC-6A. 6-Channel PCM/ADPCM Voice Module MEGAPLEX-2100 MODULE

Installation and Operation Manual VC-6A. 6-Channel PCM/ADPCM Voice Module MEGAPLEX-2100 MODULE Installation and Operation Manual VC-6A 6-Channel PCM/ADPCM Voice Module MEGAPLEX-2100 MODULE VC-6A 6-Channel PCM/ADPCM Voice Module Installation and Operation Manual Notice This manual contains information

More information

MOTOTRBO R1.8 Training Overview

MOTOTRBO R1.8 Training Overview MOTOTRBO R1.8 Training Overview MOTOTRBO System Training Release1.8 MOTOROLA, MOTO, MOTOROLA SOLUTIONS and the Stylized M Logo are trademarks or registered trademarks of Motorola Trademark Holdings, LLC

More information

DPT-1 & DPT-2. Dial Access Paging Terminal. Manual Revision: Covers Firmware Revisions: DPT: 1.57 and higher

DPT-1 & DPT-2. Dial Access Paging Terminal. Manual Revision: Covers Firmware Revisions: DPT: 1.57 and higher DPT-1 & DPT-2 Dial Access Paging Terminal Manual Revision: 2008-07-22 Covers Firmware Revisions: DPT: 1.57 and higher Covers Hardware Revisions: DPT-1: E and higher DPT-2: F and higher 1 TABLE OF CONTENTS

More information

Hytera DMR Conventional Series

Hytera DMR Conventional Series Hytera DMR Conventional Series SIP Phone Gateway to Simultaneous Calls Application Notes Document version: 3.0 Date: 02-2015 Copyright Information Hytera is the trademark or registered trademark of Hytera

More information

P a g e 1 ST985. TDR Cable Analyzer Instruction Manual. Analog Arts Inc.

P a g e 1 ST985. TDR Cable Analyzer Instruction Manual. Analog Arts Inc. P a g e 1 ST985 TDR Cable Analyzer Instruction Manual Analog Arts Inc. www.analogarts.com P a g e 2 Contents Software Installation... 4 Specifications... 4 Handling Precautions... 4 Operation Instruction...

More information

GDC 086R Issue 4, 10/17/97. Installation and Operation. Metroplex Flexi-Voice Plus Model MP General DataComm

GDC 086R Issue 4, 10/17/97. Installation and Operation. Metroplex Flexi-Voice Plus Model MP General DataComm GDC 086R603-001-04 Issue 4, 10/17/97 Installation and Operation Metroplex 6000 Flexi-Voice Plus Model MP 6360 General DataComm Manual Revision History Shown below is a chronological listing of revisions

More information

Introduction to High-Speed Power Switching

Introduction to High-Speed Power Switching Exercise 3 Introduction to High-Speed Power Switching EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with the concept of voltage-type and current-type circuits. You will

More information

Exercise 2. The Buck Chopper EXERCISE OBJECTIVE DISCUSSION OUTLINE. The buck chopper DISCUSSION

Exercise 2. The Buck Chopper EXERCISE OBJECTIVE DISCUSSION OUTLINE. The buck chopper DISCUSSION Exercise 2 The Buck Chopper EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with the operation of the buck chopper. DISCUSSION OUTLINE The Discussion of this exercise covers

More information

LBI-31564A. Mobile Communications. DELTA - SX MHz RADIO COMBINATIONS (NEGATIVE GROUND ONLY) Maintenance Manual

LBI-31564A. Mobile Communications. DELTA - SX MHz RADIO COMBINATIONS (NEGATIVE GROUND ONLY) Maintenance Manual A Mobile Communications DELTA - SX 136-174 MHz RADIO COMBINATIONS (NEGATIVE GROUND ONLY) Maintenance Manual TABLE OF CONTENTS MILITARY AND SYSTEM SPECIFICATIONS................................. 2-3 COMBINATION

More information

Exercise 1: AC Waveform Generator Familiarization

Exercise 1: AC Waveform Generator Familiarization Exercise 1: AC Waveform Generator Familiarization EXERCISE OBJECTIVE When you have completed this exercise, you will be able to operate an ac waveform generator by using equipment provided. You will verify

More information

CHAPTER 1 : INTRODUCTION

CHAPTER 1 : INTRODUCTION 1 CHAPTER 1 : INTRODUCTION 1.1. Introduction to Dual Tone Multi Frequency (DTMF) DTMF is a way for instructing a telephone switching system of the telephone number to be dial, or to concern commands to

More information

ZLS38503 Firmware for Voice Prompting and Messaging Firmware Manual

ZLS38503 Firmware for Voice Prompting and Messaging Firmware Manual ZLS38503 Firmware for Voice Prompting and Messaging Firmware Manual Features Voice recording (messaging) and playback (voice prompting) DTMF receiver Tone Generator (preprogrammed DTMF + user defined tones)

More information

The quality of the transmission signal The characteristics of the transmission medium. Some type of transmission medium is required for transmission:

The quality of the transmission signal The characteristics of the transmission medium. Some type of transmission medium is required for transmission: Data Transmission The successful transmission of data depends upon two factors: The quality of the transmission signal The characteristics of the transmission medium Some type of transmission medium is

More information

DIGITAL COMMUNICATION

DIGITAL COMMUNICATION DIGITAL COMMUNICATION TRAINING LAB Digital communication has emerged to augment or replace the conventional analog systems, which had been used widely a few decades back. Digital communication has demonstrated

More information

Introduction. AM7 Central Office Simulator with option boards

Introduction. AM7 Central Office Simulator with option boards Introduction The Ameritec Model AM7 CO Simulator is capable of simulating many of the functions of Central Office switches, PABX switches or the Public Switched Telephone Network (PSTN). The AM7 is user

More information

GSM-4 (program version 4.02)

GSM-4 (program version 4.02) COMMUNICATION MODULE GSM-4 (program version 4.02) OPERATING INSTRUCTION GDAŃSK, POLAND gsm4_e 11/03 WARNING For safety reasons, the module should only be installed by qualified personnel. In order to avoid

More information

Voice Communication Control System Specification for CWP Tungmahamek. Voice Communication Control System Specification. For.

Voice Communication Control System Specification for CWP Tungmahamek. Voice Communication Control System Specification. For. Voice Communication Control System Specification for CWP Tungmahamek Voice Communication Control System Specification For CWP Tungmahamek VCCS Specification For MK 16-10-2015 1 Table of Contents 1. INTRODUCTION...

More information

Chapter 4. Multicom Administrative Communication System. Operating Instructions

Chapter 4. Multicom Administrative Communication System. Operating Instructions Chapter 4 Multicom 2000 Administrative Communication System Operating Instructions 4-1 4-2 Compliance Warning: Changes or modifications to this unit not expressly approved by the party responsible for

More information

Part VI: Requirements for ISDN Terminal Equipment

Part VI: Requirements for ISDN Terminal Equipment Issue 9 November 2004 Spectrum Management and Telecommunications Policy Compliance Specification for Terminal Equipment, Terminal Systems, Network Protection Devices, Connection Arrangements and Hearing

More information

DIGITAL COMMUNICATIONS (INTRODUCTION TO MULTISIM SOFTWARE)

DIGITAL COMMUNICATIONS (INTRODUCTION TO MULTISIM SOFTWARE) PROJECT 1B DIGITAL COMMUNICATIONS (INTRODUCTION TO MULTISIM SOFTWARE) (i) FSK SYSTEM (MODULATOR / DEMODULATOR) Abstract: In this project, students are required to design a complete circuit of FSK SYSTEM.

More information

Contents. Telecom Systems Chae Y. Lee. FDM Bell Systems s FDM Synchronous TDM T1, T3 Statistical TDM Multiple Access: FDMA, TDMA, CDMA

Contents. Telecom Systems Chae Y. Lee. FDM Bell Systems s FDM Synchronous TDM T1, T3 Statistical TDM Multiple Access: FDMA, TDMA, CDMA Multiplexing Contents FDM Bell Systems s FDM Synchronous TDM T1, T3 Statistical TDM Multiple Access: FDMA, TDMA, CDMA 2 Multiplexing/Demultiplexing Multiplexing is the process of combining two or more

More information

10 Speech and Audio Signals

10 Speech and Audio Signals 0 Speech and Audio Signals Introduction Speech and audio signals are normally converted into PCM, which can be stored or transmitted as a PCM code, or compressed to reduce the number of bits used to code

More information

UCE-DSO210 DIGITAL OSCILLOSCOPE USER MANUAL. FATIH GENÇ UCORE ELECTRONICS REV1

UCE-DSO210 DIGITAL OSCILLOSCOPE USER MANUAL. FATIH GENÇ UCORE ELECTRONICS REV1 UCE-DSO210 DIGITAL OSCILLOSCOPE USER MANUAL FATIH GENÇ UCORE ELECTRONICS www.ucore-electronics.com 2017 - REV1 Contents 1. Introduction... 2 2. Turn on or turn off... 3 3. Oscilloscope Mode... 3 3.1. Display

More information

Exercise 3-2. Cross-Polarization Jamming EXERCISE OBJECTIVE

Exercise 3-2. Cross-Polarization Jamming EXERCISE OBJECTIVE Exercise 3-2 Cross-Polarization Jamming EXERCISE OBJECTIVE To introduce the concept of antenna polarization. To demonstrate the effect of crosspolarization jamming on a tracking radar s angular error signal.

More information

JEM Radio II Operation Guide. Manual P/N M Victor Place Colorado Springs, Colorado

JEM Radio II Operation Guide. Manual P/N M Victor Place Colorado Springs, Colorado JEM Radio II Manual P/N M09999-999 2115 Victor Place Colorado Springs, Colorado 80915 800.284.0399 www.jemcom.com Table of Contents Display... 3 Channel Entry... 4 Shortcuts... 4 Text Messages... 4 Buttons...

More information

EUROPEAN ETS TELECOMMUNICATION January 1998 STANDARD

EUROPEAN ETS TELECOMMUNICATION January 1998 STANDARD EUROPEAN ETS 300 778-2 TELECOMMUNICATION January 1998 STANDARD Source: ATA Reference: DE/ATA-005062-2 ICS: 33.020 Key words: PSTN, CLIP, supplementary services Public Switched Telephone Network (PSTN);

More information

Scope of Specifications. Technical Specifications. Voice Communication Control System

Scope of Specifications. Technical Specifications. Voice Communication Control System Voice Communication Control System Specification for Mae Sot, Tak, Sukhothai, Phrae, Phetchabun, Trat, Ranong, Trang and Scope of Specifications Technical Specifications Voice Communication Control System

More information

Recommendation T/CS (Vienna 1982) ANALOGUE SUBSCRIBER LINE TESTS AND MEASUREMENTS

Recommendation T/CS (Vienna 1982) ANALOGUE SUBSCRIBER LINE TESTS AND MEASUREMENTS o T/es 54-07 E B Page 1 Recommendation T/CS 54-07 (Vienna 1982) ANALOGUE SUBSCRIBER LINE TESTS AND MEASUREMENTS Recommendation proposed by Working Group T/No. 11 Switching and Signaling (CS) Text of the

More information

MobileRadio. Owner'sManual

MobileRadio. Owner'sManual EMH MobileRadio Owner'sManual TABLE OF CONTENTS Introduction... 1 Basic Operation... 2 Code Guard Operation... 3 EMH Radio Controls... 4 Button Functions... 4 Built-in Features... 7 Keypad Microphone Operation...

More information

SECTION III OPERATION

SECTION III OPERATION SECTION III OPERATION 3.1 INTRODUCTION This section contains information concerning the operation procedures for the BK Radio GPH Flex Mode Series handheld VHF radios. Information on installation and programming

More information

Digital Fundamentals

Digital Fundamentals Digital Fundamentals Tenth Edition Floyd Chapter 1 2009 Pearson Education, Upper 2008 Pearson Saddle River, Education NJ 07458. All Rights Reserved Objectives After completing this unit, you should be

More information

Signal Characteristics

Signal Characteristics Data Transmission The successful transmission of data depends upon two factors:» The quality of the transmission signal» The characteristics of the transmission medium Some type of transmission medium

More information

Introduction to Lab Instruments

Introduction to Lab Instruments ECE316, Experiment 00, 2017 Communications Lab, University of Toronto Introduction to Lab Instruments Bruno Korst - bkf@comm.utoronto.ca Abstract This experiment will review the use of three lab instruments

More information

TMR880i technical details

TMR880i technical details SCS / Terminals Jan 2013 1(8) TMR880i technical details SCS / Terminals Jan 2013 2(8) TETRA Terminals from CASSIDIAN fulfill the following specifications for TETRA radio equipment in the temperature range

More information

Exercise 3-2. Digital Modulation EXERCISE OBJECTIVE DISCUSSION OUTLINE DISCUSSION. PSK digital modulation

Exercise 3-2. Digital Modulation EXERCISE OBJECTIVE DISCUSSION OUTLINE DISCUSSION. PSK digital modulation Exercise 3-2 Digital Modulation EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with PSK digital modulation and with a typical QPSK modulator and demodulator. DISCUSSION

More information

Studio Broadcast System

Studio Broadcast System SET UP and USE 1. REGULATORY AND COMPLIANCE STATEMENTS... 3 2. OVERVIEW 2.1 Core Performance Targets 2.2 Specifications 2.3 System Components 2.4 System Block Diagram 3. BP24 UWB BODY PACK TRANSMITTER...

More information

Voltage Compensation of AC Transmission Lines Using a STATCOM

Voltage Compensation of AC Transmission Lines Using a STATCOM Exercise 1 Voltage Compensation of AC Transmission Lines Using a STATCOM EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with the operating principles of STATCOMs used for

More information

CONNECT SYSTEMS INCORPORATED 5321 Derry Ave., Suite B Agoura Hills, CA FLEX SERIES UNIVERSAL CONTROLLER

CONNECT SYSTEMS INCORPORATED 5321 Derry Ave., Suite B Agoura Hills, CA FLEX SERIES UNIVERSAL CONTROLLER CONNECT SYSTEMS INCORPORATED 5321 Derry Ave., Suite B Agoura Hills, CA 91301 Phone (805) 642-7184 Fax (805) 642-7271 FLEX SERIES UNIVERSAL CONTROLLER FLEX IIIA CTCSS COMMUNITY TONE PANEL User s Instruction

More information

2. TELECOMMUNICATIONS BASICS

2. TELECOMMUNICATIONS BASICS 2. TELECOMMUNICATIONS BASICS The purpose of any telecommunications system is to transfer information from the sender to the receiver by a means of a communication channel. The information is carried by

More information

EE-4022 Experiment 3 Frequency Modulation (FM)

EE-4022 Experiment 3 Frequency Modulation (FM) EE-4022 MILWAUKEE SCHOOL OF ENGINEERING 2015 Page 3-1 Student Objectives: EE-4022 Experiment 3 Frequency Modulation (FM) In this experiment the student will use laboratory modules including a Voltage-Controlled

More information

Sampling and Reconstruction

Sampling and Reconstruction Experiment 10 Sampling and Reconstruction In this experiment we shall learn how an analog signal can be sampled in the time domain and then how the same samples can be used to reconstruct the original

More information

Exercise 2-6. Target Bearing Estimation EXERCISE OBJECTIVE

Exercise 2-6. Target Bearing Estimation EXERCISE OBJECTIVE Exercise 2-6 EXERCISE OBJECTIVE When you have completed this exercise, you will be able to evaluate the position of the target relative to a selected beam using the A-scope display. You will be able to

More information

Subscriber loop. Claude Rigault ENST FCN, 29/09/2002 Claude Rigault, ENST 1

Subscriber loop. Claude Rigault ENST FCN, 29/09/2002 Claude Rigault, ENST 1 Subscriber loop Claude Rigault ENST claude.rigault@enst.fr FCN, 29/09/2002 Claude Rigault, ENST 1 FCN, 29/09/2002 Claude Rigault, ENST 2 2-wire / 4-wire Transformation FCN, 29/09/2002 Claude Rigault, ENST

More information

Part V: Requirements and Test Methods for Magnetic Output from Handset Telephones for Hearing Aid Coupling

Part V: Requirements and Test Methods for Magnetic Output from Handset Telephones for Hearing Aid Coupling Issue 9 November 2004 Spectrum Management and Telecommunications Policy Compliance Specification for Terminal Equipment, Terminal Systems, Network Protection Devices, Connection Arrangements and Hearing

More information

eguard EG2233, EG3333, EG3355, EG3388 & EG8406: Installation and Set-up Procedures Tx 2200 and Rx 4200 Boards

eguard EG2233, EG3333, EG3355, EG3388 & EG8406: Installation and Set-up Procedures Tx 2200 and Rx 4200 Boards eguard EG2233, EG3333, EG3355, EG3388 & EG8406: Installation and Set-up Procedures Tx 2200 and Rx 4200 Boards A. Primary Technical Data: Transmitter Operating voltage DC 24V Operating current. < 450mA

More information

Introduction to IS-95 CDMA p. 1 What is CDMA p. 1 History of CDMA p. 2 Forms of CDMA p MHz CDMA p MHz CDMA (PCS) p. 6 CDMA Parts p.

Introduction to IS-95 CDMA p. 1 What is CDMA p. 1 History of CDMA p. 2 Forms of CDMA p MHz CDMA p MHz CDMA (PCS) p. 6 CDMA Parts p. Introduction to IS-95 CDMA p. 1 What is CDMA p. 1 History of CDMA p. 2 Forms of CDMA p. 3 800 MHz CDMA p. 6 1900 MHz CDMA (PCS) p. 6 CDMA Parts p. 7 Mobile Station p. 8 Base Station Subsystem (BSS) p.

More information

(Refer Slide Time: 2:23)

(Refer Slide Time: 2:23) Data Communications Prof. A. Pal Department of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture-11B Multiplexing (Contd.) Hello and welcome to today s lecture on multiplexing

More information

User Manual. Specifications...3. Control and Operation Microphone...8. Installation...9. Installation of Main Unit...9

User Manual. Specifications...3. Control and Operation Microphone...8. Installation...9. Installation of Main Unit...9 Contents Specifications...3 Control and Operation...4-7 Microphone...8 Installation...9 Installation of Main Unit...9 Antenna Installation...9 Operational test...9 Frequency Bands Table...10 Frequency

More information

TELECOMMUNICATION SWITCHING SYSTEMS STUDY NOTES

TELECOMMUNICATION SWITCHING SYSTEMS STUDY NOTES TELECOMMUNICATION SWITCHING SYSTEMS STUDY NOTES UNIT I EVALUATION OF PUBLIC SWITCHED TELECOMMUNICATION NETWORKS Switching system functions stronger switching system cross bar exchange SPC exchange Message

More information

Interfacing to the SoundStation VTX 1000 TM with Vortex Devices

Interfacing to the SoundStation VTX 1000 TM with Vortex Devices Interfacing to the SoundStation VTX 1000 TM with Vortex Devices Application Note Polycom Installed Voice Business Group September 2004 Rev. F TABLE OF CONTENTS TABLE OF CONTENTS... 2 INTRODUCTION... 6

More information

Transmit filter designs for ADSL modems

Transmit filter designs for ADSL modems EE 233 Laboratory-4 1. Objectives Transmit filter designs for ADSL modems Design a filter from a given topology and specifications. Analyze the characteristics of the designed filter. Use SPICE to verify

More information

LLS - Introduction to Equipment

LLS - Introduction to Equipment Published on Advanced Lab (http://experimentationlab.berkeley.edu) Home > LLS - Introduction to Equipment LLS - Introduction to Equipment All pages in this lab 1. Low Light Signal Measurements [1] 2. Introduction

More information

The Communiqué Digital Telephone Station

The Communiqué Digital Telephone Station The Communiqué Digital Telephone Station Press the Security* and 1 Automation* keys to access your security system and any home automation features, respectively (optional: see below). Press and hold the

More information

This document is designed to be used in conjunction with the CMX869A data sheet.

This document is designed to be used in conjunction with the CMX869A data sheet. CML Microcircuits COMMUICATIO SEMICODUCTORS Publication: A/Telecom/869A/1 May 2006 Application ote Bell 212A Implementation with CMX869A 1 Introduction The Bell 212A data communications protocol, originally

More information

Exercise 8. The Four-Quadrant Chopper EXERCISE OBJECTIVE DISCUSSION OUTLINE DISCUSSION. The Four-Quadrant Chopper

Exercise 8. The Four-Quadrant Chopper EXERCISE OBJECTIVE DISCUSSION OUTLINE DISCUSSION. The Four-Quadrant Chopper Exercise 8 The Four-Quadrant Chopper EXERCISE OBJECTIVE When you have completed this exercise, you will be familiar with the operation of the four-quadrant chopper. DISCUSSION OUTLINE The Discussion of

More information

Test No. 1. Introduction to Scope Measurements. Report History. University of Applied Sciences Hamburg. Last chance!! EEL2 No 1

Test No. 1. Introduction to Scope Measurements. Report History. University of Applied Sciences Hamburg. Last chance!! EEL2 No 1 University of Applied Sciences Hamburg Group No : DEPARTMENT OF INFORMATION ENGINEERING Laboratory for Instrumentation and Measurement L: in charge of the report Test No. Date: Assistant A2: Professor:

More information

The Sampling Theorem:

The Sampling Theorem: The Sampling Theorem: Aim: Experimental verification of the sampling theorem; sampling and message reconstruction (interpolation). Experimental Procedure: Taking Samples: In the first part of the experiment

More information