Connection between FXS/DID to PBX Trunk

[Kaushik Ray]

Hello

I am trying to find how to setup a trunk between FXS/DID ports on a Cisco Router to a PBX.

Can anyone who has set this up before share some some documents / links which shows how this can be setup?

Many Thanks

[mhnedirli]

hi, 

i never heard such a thing before, as i know you coldnt setup trunk on the FXS port due to this lines for single users or fax devices, what do you need this. if you need trunk between router and pbx you need to have a BRI/PRI or FXO line.

[mhnedirli]

hi, this is hunt group you can find more information if you search as hunt group

[Dragan Ilic]

I'm pretty sure that had setup similar to yours :)

I connected some old Selta PBX with Cisco router using FXS ports (Selta PBX side was acting like PSTN right).

Basically I always create trunk group with FXS port and then create dial-peer with some destination pattern pointing to that trunk group - pretty simple...

If I'm in right direction with your problem then I can provide you with some specific configs ;)

BR,

Dragan

[Kaushik Ray]

Thanks Dragan

yes it seems to be the same problem; if you can please share a link which shows how to create the trunk it will be most appreciated.

thanks

[Dragan Ilic · Accepted solution]

Well you can find info about creating trunk groups with voice ports (FXO or FXS) with google definitely :)

But here is some example of real config about that:

trunk group FXS-PBX
 hunt-scheme round-robin - "THIS IS TRUNK GROUP CONFIG"

voice-port 0/1/0
 trunk-group FXS-PBX
 cptone SI
 description ===FXS PBX 1===
!
voice-port 0/1/1
 trunk-group FXS-PBX
 cptone SI
 description ===FXS PBX 2===
!
voice-port 0/1/2
 trunk-group FXS-PBX
 cptone SI
 description ===FXS PBX 3=== - "PUT 3 VOICE FXS PORTS IN TRUNK GROUP"

dial-peer voice 100 pots
 trunkgroup FXS-PBX
 description ===FXS PBX===
 destination-pattern XXX - "CREATE PATTERN TO SEND CALLS TO PBX"

And that would be your start point...then configure your PBX digit manipulation in opposite direction (can't help on that because I'm in IP world definitely :) )

HTH,

Dragan