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Im using the android.net.sip class to make SIP calls

Although, I can make calls and capture all the audio events from the call session Like ringing, busy, callconnected.....

How do i add the ringbacktone, and busy tone to the calls.

By default sipmanager does not play any of the normal audio you would expect to hear while placing a call.

Since the SIP Server does not send back any audio during a connection i assume the audio must be played on the local phone.

I found mentions of Startringbacktone() but i dont see how to play it.

Cœur
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user1203336
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2 Answers2

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What you're referring to is Early Media. Early media is simply media that is sent before a call is answered. Early media is typically supported by the use of the 183 Session In Progress response. Unlike a 180 Ringing response, 183 will contain SDP. This SDP is used to establish a media connection that carries those network tones and messages.

A good read is SIP Media Management: Early Media vs. Late Media

user2818782
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i just used MediaPlayer to play a sound between starting the call and when the OnCallEstablished is called.

As for a sound for busy I am not sure how to do that. Maybe test to see what is called back when busy is returned and then start a media player for that as well.

draksia
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