I am currently using a Vonexus VoIP server connected to a Cisco 2811 router. The router has an ISDN PRI for voice calls and a 4Mbps ethernet connection for data. I have set up an IPSec VPN tunnel to a remote site connected with a Cisco 1721 router with a standard T1. I have installed a VoIP phone at the remote site. The phone registers with the Vonexus server fine, and calls can be made to and from the main site as well as from external phones i.e. my cell perfectly fine. However if a call is made from the phone at the remote site to an external number the audio from the VoIP phone cannot be heard. Has anyone seen this before or have any tips? More detail can be provided if needed.
Thank you
Todd