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CHAPTER 8 ND-71762 (E)
Page 104
Issue 2
MAINTENANCE PROCEDURE
“13-H”: CCS Link Failure (Permanent)
(1) Meaning
The system message “13-H” indicates that a failure has occurred many times to a common channel signaling
link and the link has been placed into make-busy state.
(2) Related System Message
When the failure is a temporary one, the system message “13-I” is output. If the failure of CCIS link restores
to normal, “13-J” is output.
Figure 8-3 Digital CCIS Line
Figure 8-4 Analog CCIS Line
Digital Line
Line for speech path and signal
to Distant office
Speech Signal
Control Signal
DTI
CCH
MDF
MDF
CCT
Digital Carrier
Equipment
Signal Line
CCH
Analog Carrier
Equipment
MDF
Control Signal
MODEM
to Distant office