Far End Device II Model 1342

Transcription

1 3 Far End Device II Model 1342 Operating Instructions Optimized for ADSL2+ May C

2 Table of Contents Introduction...3 Power-up...4 Connecting the 3M Far End Device II...5 Installing, Replacing the Battery...6 Specifications...7 Auto and Manual Testing with the 3M Dynatel Test Set 965DSP and 3M Far End Device II (FED II)...8 FED II Standard Applications...9 Getting Started...9 Hookups...9 3M Far End Device (FED) Cord Selection Chart...10 How It Works...11 Commonly Used DTMF Manual FED Commands...11 FED Applications with the 965DSP tester...12 Hookups...13 TDR End of Pair Identification...13 Quiet Line for POTS Noise Measuring...14 FED II ONLY IEEE Termination for Wideband Longitudinal Balance Measuring...14 Send Stepped Tones for Slope Measuring POTS or Wideband...15 Send a Single Tone ofr POTS Loss Measuring...16 Send a Single Tone for Wideband Loss Measuring...16 Using the FED to Strap the Pair for Special Resistance Measuring...17 Single Pair Strap for RFL...17 Separate Good Pair for RFL...18 Isolate the Yellow Banded Clips...18 Reference Card...19

3 Introduction The 3M Far End Device II (FED II) 1342 is an accessory device to the 3M Dynatel Subscriber Loop Analyzer 965DSP. When used with the 965DSP, the FED II helps improve work efficiency by automatically providing some necessary functions at the far-end of the pair under test during pair qualification testing. The 965DSP tester controls the FED II using DTMF signaling. The FED II supports the following functions for the 965DSP Auto Test feature: Loop Resistance (shorts Tip to Ring) Resistive Balance (shorts Tip-Ring to Ground) Single Tone & Sweep Loss (sends loss tone) Longitudinal Balance testing with IEEE termination (Std ) Optional second pair connection Central Office isolate Note: When the 1342 FED II is used in conjunction with a 965DSP with version or earlier software, it will support figure 1 hookup only (same as the original FED). When used in conjunction with a 965DSP with version or later software, it will support all 3 hookup configurations. The FED II is contained in a small plastic case with an on/off pushbutton and LED power/battery indicator. It is powered by a 9-volt alkaline battery (supplied). The test lead is terminated with an RJ-45 on one end and 7 color-coded heavy-duty alligator clips on the other. The RJ-45 connector plugs into the top of the FED II case.

4 Power-up The 3M Far End Device II can be turned on manually (by the user) or remotely (by the 3M Dynatel Tester 965DSP). The FED II is powered up manually and placed in an idle state by pressing the on/off push button once. If the push button is pressed twice rapidly in succession, the unit is powered-up and begins sending an identification (ID) tone on pair 1 (bluebanded test leads). The ID tone, when applied to the pair under test, can be used to identify the pair at the other end of the cable. Pressing the push button once more turns the unit off. If the FED II is powered up in the ID tone mode, it can also be used to measure continuity. The FED II will produce a continuous tone if the resistance between the black and red test clip is 800 ohms or less. This feature can be used to positively identify a pair if the tip and ring at the other end has been shorted together. The FED II is powered up remotely by the 965DSP at the beginning of the Auto test sequence. The LED will begin to flash at a rate of about four times per second. If the unit detects that the battery is weak, the LED will flash once per second. The battery should be replaced as soon as possible when this occurs.

5 Connecting the 3M Far End Device II Once the test pair(s) has been located, the FED II can be connected to the pair(s) at the initial work point. Normally this pair(s) would be opened at the pedestal or splice point. The FED II is connected to the test pair(s) in the direction of the tests as shown in Figures 1 and 2. The FED II can also be used on an active pair as shown in Figure 3. In Figure 3 the FED II is placed in series between the 965DSP test set and the CO on an active pair. Fig. 1 One Pair Hookup Fig. 2 Two Pair Hookup 965 DSP Pair 1 Ring (blue) FED Pair 1 Tip (blue) or FED II Ground (green) 965 DSP Pair 1 Ring (blue) FED II Pair 1 Tip (blue) Pair 2 Ring (red) Pair 2 Tip (red) Ground (green) Fig. 3 One Pair Hookup 965 DSP Pair 1 Ring (blue) Pair 1 Tip (blue) Ground (green) CO Ring (yellow) Central FED II CO Tip (yellow) Office Hookups: 1. Pair one is marked with blue bands. The black clip is Tip (A), the red clip is Ring (B). The bluebanded leads connect to the primary test pair. 2. The CO pair is marked with the yellow band. The black clip is Tip (A), the red clip is Ring (B). The yellow-banded leads are optional. Connected to the CO side of a working pair (Fig. 3) the FED II will isolate this circuit towards the CO. 3. Pair two is marked with red bands. The black clip is Tip (A), the red clip is Ring (B). The redbanded leads connect to the optional secondary test pair (Fig. 2).

6 4. Green lead always connects to shield and ground or to a reference conductor. The 3M Far End Device II testing between the 3M Dynatel Tester 965DSP and the FED II on a dead pair. After the testing is completed, the FED II will re-activate pair until the FED II is removed from the circuit. Note: Install the FED II per figure 1, 2 or 3 and the 965DSP will activate the FED II as required. Installing/Replacing the Battery Turn the unit over so that it is facing down. Loosen the screw at the top-center of the battery cover (beneath the rear label) using a small phillips screwdriver. Remove the cover by lifting the part closest to the retaining screw (cover is hinged at the bottom). Remove the battery from the compartment. Unsnap the clip from the 9V battery and discard per applicable regulations. Press the clip onto the contacts of the new battery, making sure that the contacts mate properly. Place the battery back in the compartment as shown on the rear label. Insert the two tabs of the battery cover into the lower part of the opening being careful not to force it. Press the cover into place and tighten the retaining screw.

7 Specifications Size: 2.6 X 4.7 X 0.9 (6.6 X 11.9 X 2.3 cm) Weight: 5.6 oz. (159 g.) with battery Operating temp.: 0 to +140 F (-18 to +60 C) Storage temp.: -40 to +165 F (-40 to +75 C) Battery life: 24 hours typical Battery shelf life: 2 months (installed) Replacement battery: Duracell MN1604 or equivalent Strap resistance: Less than 0.2 ohmsdc input impedance: >100 megohms tipring-gnd AC input impedance: ~100 kohms in series with 470 pf tip-ring Voltage rating: 250 Vdc, 150 Vac ID tone frequency: 577 Hz & 1004 Hz ID tone amplitude: 8 volts p-p no load typical Transmitted tones: 0 dbm ± 0.5 dbm 400 Hz to 100 khz 0 dbm ± 1.0 dbm 100 khz to 2.2 MHz Tone output impedance: 600 Ω < 20 khz 135 Ω 20 khz Termination: IEEE (Std ) Termination limited to 1 volt peak

8 Field Note 33 AUTO and Manual Testing with the 3M Dynatel Test Set 965 DSP and 3M Far End Device II (FED II) The 3M Far End Device (FED) is like having a helper at the far end of the pair while you are performing AUTO Tests with the 965DSP tester, whether you are qualifying pairs for new service installations or identifying service problems on working lines. The FED will send pair identification tone, send the appropriate transmission tones for the type of service being qualified, provide the proper terminations for noise testing and will not interfere with open ended tests. The FED II has the same applications as the original FED plus additional functionality. The FED II allows two pair testing (primary pair 1 and secondary pair 2) for vacant pair tests. It may be installed on a working pair at the Central Office MDF, CDO MDF, at a cross connect box or at a subscriber NID in line with the working pair. It does not interfere with service in its pass through mode when dormant and it does not matter if the service is POTS or wideband. When the FED is activated with the 965DSP AUTO Test, it will automatically disconnect the CO or subscriber side of the circuit making the pair vacant for further testing. After testing as a vacant pair the 965DSP will turn off the FED putting the pair back into service automatically.

9 3M Far End Device (FED II) Standard Applications The FED II, when used with the 3M Dynatel Test Set 965DSP (Ver or higher software), will qualify: POTS Inactive test POTS Inactive and Active tests on working service Wideband tests on active or inactive service Getting Started Gather as much information about the cable and pairs as possible (cable and pair number/s, wire gauge, general layout of the cable network, approximate length of the pair, cross box and workout terminal location and the type of service to be tested). It s always a good idea to pretest the pairs with the 965DSP tester Inactive pair AUTO test before hooking up the FED. All commands for the FED are made on the pair under test. If the pair has an open, the FED can t hear the commands. Hookups There are four color-coded sets of test leads on the FED II: Green Blue banded - connects to ground - connects to pair 1 (primary test pair) Optional Red banded - connects to pair 2 (secondary test pair) Yellow banded - connects to the CO or subscriber side of the working service.

10 Each pair of test leads has a black and red set of test clips. The BLACK always connects to TIP and RED connects to RING. There are two types of hookups, Single pair or Two pair. The CO disconnect option is normally used on working services. The choice of hookups depends on the application the 3M Far End Device II will be used for. See the following chart. FED Cord Selection Chart Test Application Green Clip Gnd Blue Banded Pair 1 (Primary Pair) Red Banded Pair 2 (Second Pair) Yellow Banded CO or Subscriber Side Single vacant pair POTS or x x WB testing Single working pair POTS x x x or WB 2 vacant pait POTS or WB x x x testing 2 pair testing with primary pair working POTS or WB x x x x FED FED II 10

11 How It Works After the 3M Far End Device has been placed on a pair and the 3M Dynatel Test Set 965DSP hooked up at the other end, the 965DSP AUTO test function will automatically command the FED to wake up and program the FED for the appropriate INACTIVE or WIDEBAND test routines. When the test is finished, and the 965DSP has exited the AUTO test program, the 965DSP will turn the FED off automatically. Commonly used DTMF Manual FED Commands The Far End Device can be used manually for additional applications. It can be controlled using the dial pad of the 965DSP. The FED will have to be turned on remotely and a security password must be used before entering DTMF application commands. When you are finished testing the FED, it should be turned off to conserve its battery. NOTE: The most frequently used DTMF command strings may be programmed, stored and used in the 965DSP dial test set function. 11

12 3M Far End Device Applications with the 3M Dynatel Test Set 965DSP When the FED has been manually turned on with a double keystroke, pair ID tone is being transmitted. You will first need to turn the tone off with the 965DSP by holding down any DTMF key for more than 5 seconds. Application Turn ON the FED Application command string Send the FED 577Hz ID tone for more than 5 seconds command string Security Pass Word is A hiccup will be heard on the 965DSP speaker confirming acceptance of the password. Application command string Turn OFF the FED 9# Don t forget to turn it off when finished with the testing. Application command string Set the temporary extended time (N = time in seconds) from 0 to N# 12

13 Without the temporary time set, the default time for all the applications will always be 10 seconds. Enter the time extension followed by the function command. There can be no more than a 1 second pause between key presses when using the 3M Dynatel Test Set 965DSP keypad entering DTMF commands. If the 1 second elapses, you must start the command over. HOOKUPS The 3M Far End Device hookup will be Black to TIP, Red to RING and Green to Ground for all applications except Resistance Fault Locating (RFL). After the FED has been turned on and the DTMF commands have been sent for your application, back out of the dialing function and use the appropriate test feature of the 965DSP tester to measure. TDR end of pair identification Application & time command string Open and short the pair every half second (winking) Wink for 10 seconds 007# Wink for 30 seconds 730#007# Wink for 60 seconds 760#007# 13

14 Quiet Line (600 Ohm Termination) for POTS Noise Measuring Application & time command string Quiet for 60 seconds 760#6# Quiet for 5 minutes 7300#6# Quiet for 15 minutes 7900#6# 3M Far End Device II ONLY IEEE Termination for Wideband Longitudinal Balance Measuring Application & time command string Term for 30 seconds 730#47# Term for 60 seconds 760#47# Term for 5 minutes 7300#47# Do not use if: VAC TG > 3 or VAC RG > 3 or VDC TG > 3 or VDC RG > 3 14

15 Send stepped tones for Slope measuring POTS or Wideband Step Tone Chart Command String Frequency Steps Slope Test Application 00052# 404, 804, 1004, 1204, 1404, 1604,1804, 2004, 2804, 3004 Hz POTS 00053# 20, 28, 32, 40, 48, 82 khz 56kB 00054# 20, 28, 32, 40, 48, 82 khz 64kB 00055# 20, 28, 32, 40, 48, 60, 70, 82 khz 00056# 20, 30, 50, 70, 90, 110, 130, 196, 400 khz 00057# 200, 400, 500, 700, 772, 1024 khz 00058# 20, 30, 40, 50, 69, 90, 110, 138, 276, 400, 600, 800, 1000, 1100 khz 00059# 200, 400, 500, 700, 772, 1024 khz ISDN HDSL T1 ADSL E1-High Cap 15

16 Send a Single Tone For POTS Loss Measuring Application & time command string Send single POTS Frequency to be sent from 200 Hz up to 9999 Hz. 404 Hz for 10 seconds # 1004 Hz for 30 seconds 730# # 2804 Hz for 60 seconds 760# # Send a Single Tone for Wideband Loss Measuring Application & time command string Send single Wideband Frequency to be sent from 20K Hz up to 1024K Hz. 40K Hz for 15 sec. 715#00240# 80K Hz for 30 sec. 730#00280# 196K Hz for 45 sec. 745#002196# 1100K Hz for 60 sec. 760# # The 3M Far End Device may be used to short and ground the pair for Special Resistance (balance testing) and as a strap for Resistance Fault Locating. This process is a little more difficult because the 3M Dynatel Test Set 965 DSP hookup will have to be changed after commanding the FED to the standard measuring hookups. 16

17 Using the 3M Far End Device to Strap the Pair for Special Resistance measuring The FED hookup will be Black to TIP, Red to RING and Green to GROUND. After the commands have made, use the standard 3M Dynatel Test Set 965 DSP hookup for Special Resistance Measuring. Application & time command string Short and Ground the Pair Short and Ground for 60 seconds 760#5# Short and Ground for 5 minutes 7300#5# Short and Ground for 15 minutes 7900#5# Short and Ground for 30 minutes 71800#5# Single Pair Strap for RFL The FED hookup will be Black to TIP, Red to RING and Green to GROUND. The 965 DSP tester hookup during commanding will be, Black TIP, Red to RING and Green to GROUND. After the commands have been made, use the standard 965 DSP hoolup for single pair RFL. Application & time command string Loop (short) the Pair Short for 60 seconds 760#1# Short for 5 minutes 7300#1# Short for 15 minutes 7900#1# Short for 30 minutes 71800#1# 17

18 Separate Good Pair for RFL The 3M Far End Device hookup will be Black and Red to the good pair, Green to the faulted wire. The 3M Dynatel Test Set 965 DSP hookup during commanding will be, Black and Red to the good pair, Green to the faulted wire.after the commands have been made, use the standard 965 DSP hookup for single pair RFL. Application & time command string Short and Ground the Pair Short and Ground for 60 seconds 760#5# Short and Ground for 5 minutes 7300#5# Short and Ground for 15 minutes 7900#5# Short and Ground for 30 minutes 71800#5# Isolate the Yellow Banded Clips Application & time command string Isolate and de-isolate Isolate 21# De-isolate 20# 18

19 Here is a Quick Reference table for the 3M Far End Device II (FED II) 1342 for you to use. Cut it out and carry it with you. FED Commands 5 sec. 577Hz ID Tone Turn ON FED Applications Security Password 7N# Temporary time set (N = seconds) 9# Turn OFF FED 1# Short the pair 5# Short and ground the pair 6# 600 ohms termination 47# Wideband LB IEEE termination 001N# Single tone POTS (N = tone) 002N# Single tone wideband (N = tone KHz) 007# TDR end of pair ID 19

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