PRI -- cable to carrier equipment

[wpetilli]

Had a new site go up just recently and when a standard cat6 Ethernet cable was used between the MM710 and the carrier handoff the circuit would not come into service. Using a cross-over cable did work. Not a DS1 cable, but a standard cross-over cable. I didn't think that was common.

 

[joe2938]

depends how they delivered it but is is working so no worries

 

[AvayaTier3]

DS1 cables should have shielded transmit/receive pairs from the ds1 board / csu to the Telco demarc.

25 Pair cable connector are for tn464, tn767, tn2464, etc. legacy ds1 hardware
transmit pair
T - tip  - violet-orange - Amphenol pin 47
R - ring - orange-violet - Amphenol pin 22
receive pair
T1 - tip  - violet-green - Amphenol pin 48
R1 - ring - green-violet - Amphenol pin 23

DS1 Tie Trunk Example
DS1 tie trunks provide a 1.544 Mbps (T1) or 2.048 Mbps (E1) digital data service
between 2 collocated systems or between the system and a data network. The
following cables can be used:
- C6C connector cable ? 50-foot (15.2 m) shielded cable with a 50-pin
male connector on 1 end and a 15-pin male connector on the other end.
Use to connect a DS1 tie trunk circuit pack to a Channel Service Unit.
- C6D connector cable ? 50-foot (15.2 m) shielded cable with a 50-pin
male connector on each end. Use to connect a DS1 tie trunks in collocated
cabinets.
- C6E connector cable ? 100-foot (30.5 m) shielded cable with a 50-pin
male connector on 1 end and a 50-pin female connector on the other end.
Use as an "extension" cable between the DS1 tie trunk circuit pack and
other connector cables.
- C6F connector cable ? 50-foot (15.2 m) shielded cable with a 50-pin
male connector on 1 end and a 3 inch (7.62 cm) stub on the other end. Use
to connect the DS1 tie trunk circuit pack to channel multiplexers requiring
hardwired connections. See Table 1-12 for a pinout.

Collocated DS1 Tie Trunks

Two DS1 tie trunk circuit packs can be in collocated systems. A DS1 tie trunk
circuit pack in 1 system can connect to a DS1 tie trunk in another system. Use a
C6D cable if the distance is less than 50 feet (15.24 m). If the distance is
greater than 50 feet (15.24 m), use a C6E cable.
NOTE:
The maximum distance between cabinets is 1310 feet (399.3 m).


Table 1-12. Pinout of C6F Cable

Wire Color      Lead Designation        Pin Number
White/Green     LI (High Side)          47
Green           LI                      22
White/Brown     LO                      48
Brown           LO (High Side)          23
White/Slate     LBACK2                  49
Slate           LBACK1                  24

A great teacher, does not provide answers, but methods to teach others "How and where to find the answers"

bsh

40 years Bell, AT&T, Lucent, Avaya
Tier 3 for 30 years and counting
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