Ribbon Documentation Portal will be unavailable Thursday February 2nd 2023 between 2:00 PM EST ~ 12:00 PM. More Info

Versions Compared


  • This line was added.
  • This line was removed.
  • Formatting was changed.


Third-Party Product Features

The testing was executed with the AT&T test plan, and the following features were tested:

  • Basic originated and terminated calls 
  • Calling Number presentation
  • Hold and Resume
  • Voice Mail
  • Conference Call
  • Network-Based Call Transfer (Blind and Unattended transfers are only supported with Avaya SIP endpoints)
  • Call Forwarding
  • Auto Attendant
  • Meet-Meet Conference
  • AT&T IP Teleconferencing
  • N11 Calls
  • FAX
  • DTMF
  • Network Based Enhanced Features

Not Supported Features

  • cRTP
  • SBC sends SIP 18x or 200 response without p-time in SDP