I'm a bit confused regarding Call Hold service using SIP. I have seen two
differnet approaches to solve this:

1. Send a re-Invite with "0.0.0.0" as the IP address in the sdp data
2. Send a re-Invite with the parameter a=sendonly set in the sdp data

Is there some draft or RFC about this? Which one is preferred? I guess it is
best to have support for both ways (at least receiveng call hold) but when I
send the call hold I need to know which way to use.

Do you see any pros/cons about the two different solutions?

Regards,
Andreas

____________________________________
Andreas Bystrom
Computer Engineer

e-horizon Streaming Technologies
Stadshusplatsen 2, 4th floor
Box 172
SE 14922 Nynashamn

mail  : [EMAIL PROTECTED]
web   : www.e-horizon.se
phone : +46 8 524 201 80
mobile: +46 708 85 23 35
____________________________________

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