I deployed an IP Telephony infrastructure with several IP Communicator software phones. Most users of these IP Communicators are teleworkers connecting from the Internet to the headquarters using Cisco's VPN client. The VPN concentrator is a Cisco AS...

I'm using Dialpad.com service for VoIP across the Internet. When I use my ATA186 it works fine (using SIP), but I can't figure out how to configure my 2611XM router with FXS card to do the same. What I don't know how to configure is the SIP authen...

Hi. I have two 3725 routers connected through a VPN. One of them (RA) is running CCME 3.1, the other one (RB) is connected to a Nortel PBX via a T1 CAS interface.When I place a call from an IP Phone registered to CCME in RA to a phone in the PBX conn...