Implementing asterisk pbx

Hello |Everybody,

I have a customer that is interested in implementing Asterisk PBX, The company has 10 PSTN (Telecom) lines and have 100 Analogue Intercom Extention lines.

How can I implement this solution without changing the 100pcs analogue phones IP-Phones


You will need lots of FXS ports… Email digium and see if they have anything. Expect to pay a bit for this though.

You can use there old PBX. Conect the old PBX to asterisk for Voicemail and IP telephony, for evrything else use good old PBX.