I have a customer what would like to use an external audio source for music on hold. They are in the process now of moving to 4300/4400 ISRs. According to this link using the router to tie in an external music source is no longer supported. Is there an alternative to support a live feed?
https://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/NIM/software/configuration/guide/b-ConfVoiFxNIM.html#con_1145762
Unsupported Features
Following is a list of features not supported on the Cisco Fourth-Generation Voice & Fax Network Interface Module in Cisco IOS XE Release 3.14S:
- Codecs: iLBC, iSAC, G.723.1
- Connection trunk
- Hoot and holler, voice multicasting
- Music on hold (MoH) from a live feed
