Common Channel Interoffice Signaling (Ccis) Line Fault - NEC Univerge SV8500 Operation And Maintenance Manual

4.12 Common Channel Interoffice Signaling (CCIS) Line Fault

This section explains the fault repair procedure when any of the faults shown in Table 5-10 occur to a spe-
cific CCIS line.
FAULTY SITUATION
A specific CCH/CCT card is faulty.
When the signal transmission line is a digital line, transmitting/
receiving of control signals cannot be performed.
4.12.1 Check Point
When repairing a CCIS Line fault, consider the following items:
(1) Check alarm lamps on the CCH or CCT circuit card.
(2) Refer to Figure 5-27, and check the cable connection.
4.12.2 CCIS Line Control
The CCH/CCT circuit card controls the signal link (digital) of the interoffice common channel signaling
system and transmitting/receiving call processing information. The signal link controls permit normal
transmission and reception of call processing information.
A break in signal links is detected, then restored to establish signal links. The call processing information
is converted into signal format for Channel 1 (any channel) of the DTI before being transmitted to a distant
office. Figure 5-27 shows the CCIS line control route.
CHAPTER 5
Table 5-10 CCIS Line Fault Situation
– 654 –
Operation Procedure for System with PIR
REFERENCE SECTION
Section 4.12.3, Specific CCH/CCT Card Is Faulty
Section 4.12.4, Fault of CCH, DTI and Related Flat
Cable