CUCM-Granstream Sip Trunk Issue

[waqas sardar]

Hi Team,

Attached are logs.

We are facing issue while creating sip trunk between cucm and grandstream pbx .

Cucm (134.119.189.230)

Grandstream(213.175.162.27)

From Cisco call is not working .

[Bowen Qin]

You should using CUBE to interconnect two PBX it is not safe to NAT a public IP to your CUCM.
You will also need to using SIP Profile to modify the sip header so the calls can be returned to your public IP.

[waqas sardar]

How to to modify the sip header so the calls can be returned to your public IP. 

[Ritesh Desai]

Hi @waqas sardar 

You would request you to implement Cisco CUBE for SIP HEADER modification.

URL: CUBE HEADER MANIPULLATION 

Secondly I would suggest to implement NAT on Grandstream SIP TRUNK IP Address.

Make sure the transport, protocol, codec matches at both the ends.

While configuring SIP trunk on Cisco do mention " voice-class sip options-keepalive" in dial-peer for monitoring the SIP TRUNK status on CUBE.

regards,

Ritesh Desai

[waqas sardar]

We don't have cube.

[Roger Kallberg]

Without a session border controller, known as SBC or CUBE in Cisco terminology, you would very likely not get this to work. Do you’re self a favour, take the advice given and setup a SBC in the call path.