
MAINTENANCE PROCEDURE
3. CCIS (Common Channel Interoffice Signaling) Line Fault
This paragraph explains the fault repair procedure when any of the faults shown in Table
3.1 Check Point
When repairing a CCIS Line fault, consider the following:
(1)Check alarm lamps on the CCH or CCT circuit card
(2)By referring to Figure
3.2 CCIS Line Control
The CCH within the CCH/CCT circuit card controls the signal link of the interoffice common channel signaling sys- tem and transmits/receives call processing information.
The signal link controls to send/receive the call processing information.
The call processing information is converted into No. 7 signal format for channel 1 (any channel) of the DTI before being transmitted to a distant office.
Figure 8-5 Controlling the CCIS Line
MUX
CPU | TSW |
MDF
LT Cable
DTI |
FRONT
CABLE
CCH |
CCH MODEM
MODEM CABLE
CCT
LT Cable MDF
To CCIS Line
CHAPTER 8 |
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