The rules of engagement when it comes to ring back

Here are the rules of engagement when it comes to ring back:

  • If Lync receives a SIP 180 Ringing message, it signals to the Lync client to play a ringing tone. These tones are not transmitted from the callee to the caller in RTP media packets; the ringing tone is generated locally by the Lync client
  • If a SIP 180 Ringing response is not received, never generate local ringing
  • If a SIP 180 Ringing is received but there are no incoming media packets, generate local ringing
  • If a SIP 180 Ringing has been received and there are incoming media packets, play them and do not generate local ringing

Great article here if you want to learn more.

 

Andrew Morpeth
Andrew Morpethhttps://ucgeek.co/author/amorpeth/
Andrew is a Modern Workplace Consultant specialising in Microsoft technologies based in Auckland, New Zealand; Andrew is a Director and Professional Services Manager at Lucidity Cloud Services and a Microsoft MVP.

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Andrew Morpeth
Andrew Morpethhttps://ucgeek.co/author/amorpeth/
Andrew is a Modern Workplace Consultant specialising in Microsoft technologies based in Auckland, New Zealand; Andrew is a Director and Professional Services Manager at Lucidity Cloud Services and a Microsoft MVP.

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