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HI,<br />
<br />
Is anyone able to eleborate on the operation of an generic hardware or software IP PBX, I have read:<br />
<br />
&quot;SIP clients register with the IP PBX server when they wish to make a call they ask teh IP PBX to establish the connection.&quot;<br />
<br />
I am trying to get an clear understanding for how the call flow from 1 client (IP PHONE) to another another through the PBX.<br />
<br />
Thanks
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HI,

Is anyone able to eleborate on the operation of an generic hardware or software IP PBX, I have read:

"SIP clients register with the IP PBX server when they wish to make a call they ask teh IP PBX to establish the connection."

I am trying to get an clear understanding for how the call flow from 1 client (IP PHONE) to another another through the PBX.

Thanks

IP PBX operation and SIP call flow

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.