Voice Gateway Configuration Guide

[Raminkn20]

Hi.

I have a 2811 router with fxo and pvdm, now I want to connect my cucm to this router and use this as a voice gateway to connect my cucm to PSTN. I need a guidance document to configure my router. 
I need your help.

[b.winter]

Google is your friend:
https://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/NIM/software/configuration/guide/b-ConfVoiFxNIM.html

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/sip/configuration/15-mt/sip-config-15-mt-book/voi-sip-over.html

[Raminkn20]

Thanks.

[Roger Kallberg]

Just a friendly advice, your router hardware and software is end of life since many years.

[Raminkn20]

Thanks. yeah I know that and I use it just for practice and training