Incoming call not landing on IP phones using CUCM

[Mayank Nauni]

Hi all,

I am facing an issue; the incoming calls are not landing on the IP phones using the CUCM, below is the debug for the same and it shows the cause as Unallocation/Unassigned number.

I checked the config of Gateway, route pattern, partitions and CSS but seems to be ok.

.Jan  3 17:01:44.977: ISDN Se0/0/0:15 Q921: User RX <- INFO sapi=0 tei=0, ns=93 nr=117
.Jan  3 17:01:44.977: ISDN Se0/0/0:15 Q931: SETUP pd = 8  callref = 0x017B
         Sending Complete
         Bearer Capability i = 0x8090A3
                 Standard = CCITT
                 Transfer Capability = Speech
                 Transfer Mode = Circuit
                 Transfer Rate = 64 kbit/s
         Channel ID i = 0xA98381
                 Exclusive, Channel 1
         Calling Party Number i = 0x0083, '0162508156'
                 Plan:Unknown, Type:Unknown
         Called Party Number i = 0x81, '1065'
                 Plan:ISDN, Type:Unknown
.Jan  3 17:01:44.981: ISDN Se0/0/0:15 Q921: User TX -> RR sapi=0 tei=0 nr=94
.Jan  3 17:01:44.981: ISDN Se0/0/0:15 Q931: Received SETUP  callref = 0x817B callID = 0x00F5 switch = primary-net5 interface = User
.Jan  3 17:01:44.985: ISDN Se0/0/0:15 Q921: User TX -> INFO sapi=0 tei=0, ns=117 nr=94
.Jan  3 17:01:44.985: ISDN Se0/0/0:15 Q931: CALL_PROC pd = 8  callref = 0x817B
         Channel ID i = 0xA98381
                 Exclusive, Channel 1
.Jan  3 17:01:44.985: ISDN Se0/0/0:15 Q921: User TX -> INFO sapi=0 tei=0, ns=118 nr=94
.Jan  3 17:01:44.985: ISDN Se0/0/0:15 Q931: DISCONNECT pd = 8  callref = 0x817B
         Cause i = 0x8081 - Unallocated/unassigned number
.Jan  3 17:01:44.993: ISDN Se0/0/0:15 Q921: User RX <- RR sapi=0 tei=0 nr=118
.Jan  3 17:01:44.997: ISDN Se0/0/0:15 Q921: User RX <- RR sapi=0 tei=0 nr=119
.Jan  3 17:01:45.037: ISDN Se0/0/0:15 Q921: User RX <- INFO sapi=0 tei=0, ns=94 nr=119
.Jan  3 17:01:45.037: ISDN Se0/0/0:15 Q931: RELEASE pd = 8  callref = 0x017B
.Jan  3 17:01:45.037: ISDN Se0/0/0:15 Q921: User TX -> RR sapi=0 tei=0 nr=95

Any suggestions?

Regards,

Mayank

[Mayank Nauni]

Hi Mr. Pande,

I have removed the translation pattern 1xxx as suggested by you but the issue is still the same. I am attaching the debug isdn q921 and debug isdn q931 snapshot for your reference.

Regards,

Mayank

[Gajanan Pande]

Okay, its time to call the Telco & confirm if there are any DID allocation issues with your ISDN trunks from their side. They do mess at times on DID allocation on ISDN trunks. Better to confirm with them & have them reconfigure it properly in case of any issues. Who is the Telco by the way ?

GP.

[Mayank Nauni]

If we fall back to SRST the same setup works good for us... can it still be telco's issue ? The telco is "Time" in KL ...

[Gajanan Pande]

Good point. Then it's not the Telco issue. It works in SRST becos, your gateway router perhaps has the required dial-peer but when it goes to CUCM, CUCM doesnt have the required config & it drops the call. Have TAC to fix your CUCM config.

GP.

[Mayank Nauni]

thanks for your help Cheers !