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CHAPTER 5 Operation Procedure for System with PIR
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.
Table 5-10 CCIS Line Fault Situation
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.
FAULTY SITUATION REFERENCE SECTION
A specific CCH/CCT card is faulty. Section 4.12.3, Specific CCH/CCT Card Is Faulty
When the signal transmission line is a digital line, transmitting/
receiving of control signals cannot be performed.
Section 4.12.4, Fault of CCH, DTI and Related Flat
Cable
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