Got a question I have a Cisco ubr924 wanting to use the VOIP ports got a buddy that also has same modem is there a way I can configure our routers to call each other by ip and talk using the VOIP ports? Don't know if should use MGCP or SIP or what protocol and not sure on how to configure it to make this work can someone give me some examples or help me if this will even work?? Thanks alot