Accepted Solutions
Please create separate dial peers that are used for calls from your CM and from your service provider and on these use information in the VIA header to match them. Something along the line with this should work.
voice class e164-pattern-map 1
description E164 Pattern Map for called number to CUCM
e164 4...
!
!
voice class e164-pattern-map 2000
description E164 Pattern Map for called number to ITSP
e164 0T
!
voice class uri CUCM sip
host ipv4:IP ADD CUCM 1
host ipv4:IP ADD CUCM 2
! add as many line as you need, one for each CM that handles call processing
!
voice class uri PSTN sip
host ipv4:IP ADD ITSP
! add as many line as you need
!
voice class server-group 1
ipv4 IP ADD CUCM 1 preference 1
ipv4 IP ADD CUCM 2 preference 2
! add as many line as you need, one for each CM that is in the CMG use by the trunk for the SBC
description Inbound calls from ITSP to CUCM
huntstop 1 resp-code 404 to 404
!
voice class sip-options-keepalive 1
description Used for Server Group SIP OPTIONS PING
!
dial-peer voice 101 voip
description *** Inbound Dial-Peer From ITSP ***
no incoming called-number +6221303022xx
incoming uri via PSTN
!
dial-peer voice 10 voip
description *** Inbound Dial-Peer from CUCM ***
session protocol sipv2
incoming uri via CUCM
voice-class codec 1
voice-class sip bind control source-interface GigabitEthernet0/0/1
voice-class sip bind media source-interface GigabitEthernet0/0/1
dtmf-relay rtp-nte sip-kpml
no vad
!
dial-peer voice 12 voip
description *** Outbound Dial-Peer for inbound calls from ITSP to CUCM ***
no destination-pattern 4...
no session target ipv4:IP ADD CUCM
session server-group 1
destination e164-pattern-map 1
voice-class sip options-keepalive profile 1
dtmf-relay rtp-nte sip-kpml
no vad
!
dial-peer voice 102 voip
description *** Outbound Dial-Peer to ITSP ***
no destination-pattern 0.
destination e164-pattern-map 2000
voice-class sip options-keepalive
The router it self has no version, it has a model. What version of IOS do you run on the router? Can you please share the configuration of your router and any information that you have got from your service provider? Please redact any sensitive information, like user name and password.
The first part of your output is a SIP option ping, then the lower part is a 400 Bad Request that state that your request is invalid with this error.
"Warning: 399 IP ITSP "SS280000F1048642L10295298[00000] From header absent or undecipherable",399 IP ITSP "SS280000F1048642L15013890[00000] To header absent or undecipherable""
To help you with this you really need to share the output from the whole registration process/call attempt.
Apart from the advice given by @b.winter I would recommend you to upgrade your IOS version as the one you currently use is quite buggy. Use 17.6.3a or 17.6.4 instead.
Not directly related to your issue as such, but I suggest that you have a look at this document, In Depth Explanation of Cisco IOS and IOS-XE Call Routing, and modify your configuration so that you match inbound dial peer based on information in the VIA header and that you add a specific dial peer for the inbound direction from your CM, plus use one dial peer for your communication with all your CM nodes by using a server group. With this you can remove dial peer 13 and 14. This will greatly simplify any effort in troubleshooting and your future maintenance.
It would also be of help if you would share your interface configuration so that it could be verified.
