I have the same requirement but I was unable to locate any specific thread that deatils how to add a third-party SIP phone.
I did attempt to configure the ephone-dn and ephone, but was not successful in adding the command dtmf-relay sip-notify to the ephone, and I cannot figure out why, but then is this correct programming?
Here are my commands:
name Polycom Conf Phone
username "EXT7927" password EXT7927
So any assistance in this matter is greatly appreciated.
Has any body made it working, i am in the sitatuon. I have connected my polycom to the FXS port and it is working but for one way call only. i cant make two calls or call a third party.