network 7100 systems both are behind Adtran 3140 routers

[frank6160]

Customer wants to be able to dial extensions at remote site. Both already have SIP trunks for inbound/outbound PSTN calling.

[Anonymous]

Frank, I'm not certain exactly what your question was, but if you're asking how to set this up, more than likely the easiest thing to do would be to set up a VPN tunnel between the 3140 routers using this guide:

Configuring a GRE over IPSEC VPN Tunnel in AOS

From there, you can configure a SIP trunk between the 7100s using this guide:

Configuring SIP Trunking and Networking for the NetVanta 7000 Series

Thanks

Jay

[frank6160]

Thanks Jay. That's what I was looking for.

[Anonymous]

Frank, I went ahead and flagged this post as "Assumed Answered". If any of the responses on this thread assisted you, please mark them as Correct or Helpful as the case may be with the applicable buttons. This will make them visible and help other members of the community find solutions more easily. If you still need assistance, we would be more than happy to continue working with you on this - just let us know in a reply. Thanks

Jay