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10-14 Service verification
Restoring service to the DCH
When the DCH state is LO or RNR, refer to "Troubleshooting" in Chapter 3,
"D-channel handler," for additional information on troubleshooting. Table
10-8 lists the DCH states and actions.
Table 10-8
DCH states and actions
DMS-250
switch states
INB
INI
PMB
CFL
MANB
LO
RNR
297-2521-106 Standard 23.01 March 2001
Resource out of
service
D-channel is installation
busy
DCH is being initialized
DTCI is busy
carrier failed
DCH is manual busy
logical link failed
far-end layer 3 is not
responding
Actions to be taken
- Enter the PRADCH level of the MAP terminal.
- Post, BSY, and RTS the DCH.
No action is required. The system will bring up the
DCH.
- Enter the PM level from the MAP terminal.
- Post the DTCI.
- Isolate the fault.
No action is required if DTCI is going through a
restart. Otherwise,
-enter the carrier level of the MAP terminal, then
- BSY and RTS the carrier.
From CI level of the MAP terminal:
- Enter
- MAPCI; MTC; TRKS; TTP; PRADCH.
- Post the DCH.
- Return the DCH to service.
Refer to "Troubleshooting" in Chapter 3, "D-channel
handler."
Make sure that the far-end DCH is in service.
—end—
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