Zhone Technologies 900 - Manual (Page 158)

5-44 IMACS System Release 5.1.6 Data Cards
Model No. Running Head BRI Card Specifications BRI Card
6. At the local end (where the incoming BRI loss was first observed), use the loopback
and test signal functions of the BRI card to test the affected port. These tests are
accessible from the BRI Main Screen (through the LOCAL LB and related
parameters) and its associated Test Screen (through the BERT parameter), as
previously described in this chapter. These allow you to test the circuit path in segments
and thereby quickly pinpoint the problem.
7. If necessary, also perform loopbacks and send test signals to the affected circuit from
the other end. In addition, if it is an NTU circuit, you can perform end-to-end tests using
a suitable data test set at one or both ends of the circuit in conjunction with the loopback
functions of the BRI card or NTU at either end.
8. If the BRI card is determined to be faulty, replace it and return the faulty unit for repair
to the location specified by your distributor.
5.6 BRI Card Specifications
BRI Cards (826070, 826171, and 826270)
Physical Interface
Number of Ports 8
Capacity per port Two B (64 kbps each) plus One D (16 kbps) channel
Physical Interface Female 50-pin RJ-27X Telco connector
Electrical Interface
Model 826070 and 826171 2-wire, U-interface per ANSI T1.6014.2
Model 826270 4-wire, S/T-interface per ANSI T1.602/ITU I.430
Transmission Range Model 8260, 8261, 8262, and 826270)
Wire Gauge 22 AWG (.644 mm)
23 UK SWG 24 AWG (.511 mm)
25 UK SWG 26 AWG (.405 mm)
27 US SWG
Distance 26,000 ft. (7.9 km) 22,000 ft. (6.7 km) 18,000 ft. (5.5 km)
Transmission Range Model 8262
and 826270
Mode Distance
NT p-p max. 1500mm
NT s-b max. 150m
NT e-b max. 1500m, max. 35m between devices
Transmission Range
Code Alternate Mark Inversion (AMI)
Rate 192Kbps + 100ppm
Timing External and Internal (software configurable)
Remote NTU Configuration Options (for 256x or 22xx NTU’s only)
DTE Interface Type V.36 or V.24
Synch/Asynch Synchronous or Asynchronous Transmission