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pbx <--> fxo

How should I configure a FXO port on Cisco 3640 for a PBX connection?

The diagram is:

Phone1 -- PBX -- FXO -- Cisco 3640 -- IP Network -- Cisco 1700 -- FXS -- Phone2

When Phone1 dials the number of FXO he cannot get dial tone?

Is there a problem at PBX connection or FXO configuration?

1 REPLY
Blue

Re: pbx <--> fxo

You need to configure this as an OPX (off-premise extension) if you want phone2 to appear as an extension off the PBX. If you want Phone1 to be able to call multiple extensions through your IP network you really need a DID capable interface like a 4WE&M or T1.

For an OPX your voice port configuration on the 3640 will use this command:

connection plar opx XXXX (the dial peer ext of phone 2)

On the 1700 voice port:

connection plar XXXX (dial peer ext of the 3640 FXO)

You will also need to configure the appropriate dial peers (POTS and VOIP).

Here is a good reference:

http://www.cisco.com/warp/public/788/signalling/pbx_across_ip.pdf

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