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wrong configuration lead to cannot call out

Publication Date:  2013-12-31 Views:  90 Downloads:  0
Issue Description
espace U1980 connected with PSTN via PRA link. Sometimes cannot make outgoing calls, the error code shows there is no connection available.
Alarm Information
N/A
Handling Process
Confirm with customer there are only 2 PRA link is in use, so use below command to remove the last 2 E1 ports. (configured the last 2 E1 ports to an invailable office to remove it)

config modify board slot 8 type dtu trunkport 2 officeno 254
config modify board slot 8 type dtu trunkport 3 officeno 254

then test again, problem solved.
Root Cause
check the configuration of trunk configuration by show "show trunk status slot 8 portinboard 0", got below result

**********
E1T1 Information

GlbE1T1 BoardType Trunkport Office ProtocolType CRC State 
------- --------- --------- ------ ------------ --- ------
56      DTU       0         0      PRA          YES NORMAL
57      DTU       1         0      PRA          NO  NORMAL
58      DTU       2         0      PRA          NO  LOS   
59      DTU       3         0      PRA          NO  LOS    
**********

from this we know all the 4 port is configured as office 0, but only the last 2 ports is abnormal. That maybe the cause.

Suggestions
Need to notice the trunk port configuration when add it.

END