How to develop VoIP client using SIP in J2ME?

Hi Everybody,
I want to develop a VoIP client in J2ME that connects to asterisk server of debian and can call to the registered user of asterisk server and can have a telephonic talk session easily.
Do anybody have idea regarding the development of the client or having tutorial that teaches the development of VoIP in J2ME or in any other way.?
PLZ help me to provide the solution.
Thanks in anticipation.
with regards,
KHAKHAR SAGAR

Hi
I am interested about developing VoIP application (using SIP) in J2ME platform. But I am stuck with the problem of MMAPI. Without using MMAPI J2ME has no access to mobile media devices, such as speaker or microphone, and without creating a player MMAPI can't play media data, such as sound or video. But its not possible to record voice and play voice data simultaneously using player in J2ME. So it seems almost impossible to implement VoIP application maintaining all its constraints and requirements, specially in case of delay and jitter.
I am looking for some solution, which will provide the ability to overcome this problem. I come out with two possible solutions, but not sure about their out come. If we can develop a native media application, we can have access to it by using KNI (K Native Interface). In that way we can take some risk to develop VoIP application for J2ME. My another solution is, we can handle the player using MMAPI to record and play voice data in mill second level, so that we can have a real time feeling, though I am not sure if its possible by using RTSP.
If any one have solution of this problem, please help us.
Reagards
Asif Mohammed Adnan

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