This is an old revision of the document!
server# cat sip.conf
[general] ... disallow=all allow=alaw ... [sipnet_SIPID] type=peer secret=SIPPASSWORD defaultuser=SIPID fromuser=SIPID fromdomain=sipnet.ru host=sipnet.ru callbackextension=sipnet_SIPID [sipnet_SIPID] type=user insecure=invite context=incoming nat=no directmedia=no