BCM 4.0 offsite intercom ip to offiste intercom ip dialed voice issue

[Sekin]

Greetings all.

My problem is making a voice call from one offsite ip set to another offsite ip set. You can page, call out receive calls and do every feature except make a call from one ip set to another ip set, there seems to be no voice path. The phone will ring and can be answered but no voice comes through the call. The offsite phones themselves will receive pages and voicemail; just not communicate with another offsite ip set. However if you bring in one of the offsite ip sets and put it on the local network with the BCM 200 then you can place an intercom voice dialed call. Any help would be greatly appreciated!

 

[Sekin]

I think I have the answer. I need to create an additional ip tunnel between the ip sets. Does this need to be ipSec tunnel or vpn tunnel between the offsite sets?

 

[oldestgeek]

There's a couple of ways to do it. One is to create an IPSec tunnel between the sets. That works well if you have just a few sites. If you have many sites, that would get out of hand pretty quickly as the number of tunnels increase algebraically with the addition of each new site. With more than three or four sites the answer is to use VPN equipment at the host site that allows you create a rule allowing branch-to-branch connections, which by default are blocked. With that in place all vpn connections go back to the host site where the connections are routed to the other branch sites.

 

[jsaad]

sometimes this is referred to as 'hair-pinning' (picture a hair-pin) or "spoke to spoke tunneling".