Symptom
Fault symptom: The phone connected to the U1980 fails to dial 9110. After the dialup, the busy tone is heard.
Networking: IP phones are connected through the -U1980-PRA trunk to the peer device.
Possible causes:
After number change, the called number length is 3 but the minimum number length configured for the prefix is 4. As a result, digit collection fails and the call fails to be sent.
Handling Procedure:
According to the fault symptom, the phone belongs to a POTS user and does not involve the configuration of the IAD digitmap. The busy tone may be played by the U1980 or the call is released by the peer end.
Check whether the calling number has the local, idd, and ddd call rights.
Provide the related prefix configuration. The outgoing dialing test matches prefix 9. The configuration of the prefix is as follows:
[%eSpace U1980(config)]#show prefix dn 9
SubPBXNo Prefix CallCategory CallAttribute CustomAttribute ChargeIndex SelectOfficeCode
-------- ------ ------------ ------------- --------------- ----------- ----------------
0 9 basic local null --- 0
MinLen MaxLen UseLongCLI If4PSTN WaitNextNumTimerLen PwdCallLimit CallerNumAuth
------ ------ ---------- ------- ------------------- ------------ ---
4 32 NO YES 2000 (ms) NO No CLDPredeal CLDIndex ChangeType ChangePos ChangeLen NewDn
---------- -------- ---------- --------- --------- -----
YES 1 DELETE 0 1 -
CLIPredeal Information
CLIPredeal CLIIndex ChangeType ChangePos ChangeLen NewDn
---------- -------- ---------- --------- --------- --------
YES 2 MODIFY 0 24 8811XXXX
Therefore, it is suspected that the minimum number length of the prefix is too large. As a result, the MGW fails to collect digits.
Capture call logs. The logs show that the number format is invalid. The logs show that digits have been collected and the called number is changed to 110, but the call is still waiting for digit collection.
(User locating is not end, request for next-bit callee number)
11455 [0118][0x0000a7bc][2014-08-20 03:30.80][ccm.c 6288][dwCCMNo= 52] CCM_CallStartInfomationMsgProc: numbers is:[110],1,2
11456 [0087][0x0000a7bc][2014-08-20 03:30.80][ccm.c 30388][dwCCMNo= 52] CCM_ReAnalysisPrefix
11457 [0086][0x0000a7bc][2014-08-20 03:30.80][ccm.c 23194][dwCCMNo= 52] CCM_CheckCallRights
11458 [0126][0x0000a7bc][2014-08-20 03:30.80][ccm.c 6637][dwCCMNo= 52] User locating is not end, request for next-bit callee number
11459 [0082][0x0000a7bc][2014-08-20 03:30.80][ccm.c 23821][dwCCMNo= 52] CCM_TransferUUS
Therefore, the length of the called number after number change is 3 but the minimum number length configured for the prefix is 4. As a result, digit collection fails and the call fails to be sent.
Change the minimum number length of prefix 9 to a value smaller than 4.
Suggestions and Summary:
When configuring the maximum and minimum number lengths for prefixes, ensure that the number length before and after number change is greater than or equal to the minimum number length and less than or equal to the maximum number length.
