[Asterisk-Users] Connecting two branch offices using * and Mediatrix

[Rana Dutt]

Suppose a company has a U.S. office and a foreign office, and would like to make toll-free calls using IP between the offices. The U.S office will have an Asterisk system, but the foreign office has a large legacy PBX that they want to keep.   One way to do this is to install a Mediatrix FXO gateway at the foreign office. This gateway could be connected to a couple of unused tip/ring station ports on the legacy PBX system. I assume that when the Mediatrix registers with Asterisk, it does so as a single SIP endpoint. Suppose this endpoint is SIP/mediatrix, and my extensions.conf routes all extensions beginning with 4 to SIP/mediatrix, like this:   exten => _4XXX, Dial(SIP/mediatrix,15)   When I dial such an extension from the U.S. office, presumably the Mediatrix at the foreign office will intercept the call, but then what? What I would like it do do is go off hook on one of the tip/ring ports on the legacy PBX, and dial the last 3 digits to reach another extension off the PBX. Can it be programmed to do this? Or does the caller hear the Mediatrix answering the call and then have to enter the desired extension manually?   I have a similar question for the reverse direction. What exactly does the caller from the foreign office have to do to reach an extension in the U.S. office? Thanks very much.   -Ron