I have the following setup.
Voice mail server <--> SIP proxy (VOIPswitch) <---> Linksys ATA <--> User
The SIP proxy support only DTMF inband and can't be changed since it is global config. But the voicemail server understands only the SIP DTMF outband.
What I'm trying to do is install a cisco voice router in between Voice mail server and SIP proxy (VOIPswitch) so that the final setup will be looks like
Voice mail server <-->Router <--> SIP proxy (VOIPswitch) <---> Linksys ATA <-->User
When i have tried to implement the same with the cisco 7204 router i face the issue that there is no SIP notify option available in the DTMF-Relay type even though the ios version suggest it has.
Can you please help me on following areas and solve this difficult issue
1. Will this setup will work if i create two dial peers one for Voice mail server and the other one for SIP proxy (VOIPswitch)
2. How to enable the DTMF outband in the router under the dial peer since the sip notify is not available as supported type
3. I thought to create a dial peer for Voice mail server with destination pattern as 900 (access number) and create a dial peer for SIP Proxy server with destination pattern as .9T is this ok?
4. Any other suggestion or approach?
Thanks in advance and appreciate your quickest response.
Thanks again and Happy Cisco!