SIP trunk issue on CUCM 7!

[wahidayat007]

Hi,

I am trying to setup a trunk on our CUCM 7, with a third party provider, I have got the user name/password and IP address to establish a sip trunk! I have only one route pattern which is 9.@ and I have selected SIP trunk as my gateway. I am trying to call from my IP phone, but I get cisco message, Call cannot be completed as dialed! Any help of setting this will be help full.

Thanks

[wahidayat007]

Well,

Thanks for your email. In my case, I did not have router configured as our Gateway for E1/T1. Which means we did not have any E1/T1 PSTN lines. We were connected to the third party PSTN provider through MPLS network and they provided the IP their public IP address and SIP customer user/password. I configured SIP trunk between my CUCM 7 and the PSTN Provider (Avaya or 3com system). They were using UDP port 5060 and I was trying TCP port 5060, but I changed UDP port 5060 on my side and eventually they saw our SIP request messages. In the route pattern you can define your International digits/numbers and can select SIP as your gateway in the gateway list to go through. Hope this would help.

Rgds

Wahidayat007

[jrossouw]

Hello Nick,

I've been wanting to use SIP directly from CUCM for a while now. Would you mind elaborating a bit on your statement above regarding the registration restriction? Is this something that might be available in future? I see this as a very useful method of routing calls in test/lab environments as there's no need for a gateway/cube.

Thanks, Johan

[Nicholas Matthews]

Hi Johan,

CUCM can send an invitation with authentication credentials but cannot send a REGISTER message. If your provider requires this then you will need CME/CUBE. This is a feature of smaller providers, so it's likely if you will be running the volume of a CUCM cluster over a SIP trunk it may be a non-issue.

-nick

[wahidayat007]

Well,

       Thanks for your email. In my case, I did not have router configured as our Gateway for E1/T1. Which means we did not have any E1/T1 PSTN lines. We were connected to the third party PSTN provider through MPLS network and they provided the IP their public IP address and SIP customer user/password. I configured SIP trunk between my CUCM 7 and the PSTN Provider (Avaya or 3com system). They were using UDP port 5060 and I was trying TCP port 5060, but I changed UDP port 5060 on my side and eventually they saw our SIP request messages. In the route pattern you can define your International digits/numbers and can select SIP as your gateway in the gateway list to go through. Hope this would help.

Rgds

Wahidayat007