Use The Error Counter - Nortel Communication Server 1000S Maintenance Manual

Use the error counter

Table 11
PRI channel numbers and equivalent terminal numbers (Part 2 of 2)
Channel number
20
21
22
23
24
The error counter detects bipolar violations or no-signal periods. It counts,
stores, and displays these occurrences to a maximum of 9999.
The PRI fault detection and isolation procedures described in this section are
performed using a portable test package, which consists of one each of the
following items:
• the TTT2028 Mini-Error Counter, plus operation instruction card
• a cord equipped with a bantam plug at one end and minihooks at the other
• a loopback plug (shorts pins 3 to 1 and 11 to 9 of a 15-pin D connector)
Primary Rate Interface maintenance
D2 format TN (S C U)
2 8 0
0 4 0
2 4 0
1 8 0
3 8 0
ISDN Primary Rate Interface
Page 67 of 210
D3, D4,E SF format
TN (S C U)
2 4 0
2 5 0
2 6 0
2 7 0
3 8 0
Maintenance