How to connect trixbox server to existing IP-PBX server

Any one know how to connect trixbox server to existing IP-PBX server? I have set up a Asterisk PBX server and now want to integrate it to my company’s current IP-PBX, then we no need to buy the IP phone and also can use the current Calling system, yet we still can save some money.

Well first off, tell us what your existing system is, without knowing what it is we can’t tell you if you need to setup a zap trunk, a sip trunk, or what, depending on what the system you have is, and what options it accepts it may have different configuration possibilities. We need more information to help you!!