Directshow problem - Frustrated - hlp me

Hi,
I m using directshow with vc and i m working on audio / voice conferencing application. I m using gsm / multiple codecs and application can do both unicasting and multicasting .there are 2 problems,
1- in directshow there isn't any filter for sending the packet to network. [audio Capture part]
2-and receiving the packet from the network [playback part].

i found DSNetwork sample in directx9 but the problem is it is for mpeg2. Then i chk conference XP but it requires licence.

so i need somehow Sending and receiving filters like RtpSink and RtpSource.

I m already frustrated as i m not getting any help even when i contacted microsoft. please help me out.

Regards
Usman Sarwar

Not clear. You need coding help?To be precise, do you want to implement those filters?
Frankly, I have never used directshow and neither worked on videoconferencing applications.

Hi,
I need help in coding part, what i need is to implement those interfaces or any way to solve my problem.