I also posted this at IP telephony but I think this is better place to ask this type of questions.
Is there a way to nail up an IP to IP transcode channel through a 2811 without any SIP (or other) signalling by using IOS commands? I'd like to stream IP media through the gateway using test equipment that cannot perform the SIP signalling. The alternative is to hook up a few endpoints, start a sip session to open up the media ports. unplug the endpoints and turn on the test equip to stream the media. However, I'm not sure there is any keep alive that might kill the session after some interval of inactivity.