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New Member

Problems with a T1 CAS back-to-back configuration with fxs port

Hi everybody!

I'm looking to acquire knowledge in IP telephony and VoIP. I'm testing some configuration back to back and I have some problems with a T1 CAS link.

Here is my situation:

On each side, I have two analog phones connected to a 2811 router. The routers are connected by a T1 CAS link (with a T1 crossover cable).

I can call a local number, but when I try to reach the remote phone, I get only one ring tone in the local phone, but no ring on the remote phone.

I tried on a T1-PRI connection and I have not problem.

The problem is that I do not do the commands "debug cas" on my router (the command is not present)

There is my configuration:

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!! CME Router 1

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!

network-clock-participate wic 2

!

isdn switch-type primary-ni

!

controller T1 0/2/1

framing esf

clock source line

linecode b8zs

mode cas

ds0-group 1 timeslots 1 type fxo-ground-start          <- I'm not sure about this type on each router

no shut

!

voice-port 0/3/0

signal groundStart

description 5000

station-id number 5001

no shut

!

voice-port 0/3/1

signal groundStart

description 5001

station-id number 5001

no shut

!

dial-peer voice 5000 pots

destination-pattern 5000

port 0/3/1

!

dial-peer voice 5001 pots

destination-pattern 5001

port 0/3/0

!

dial-peer voice 6000 pots

destination-pattern 6000

incoming called-number 500

direct-inward-dial

port 0/2/1:23

forward-digits all

!

dial-peer voice 6001 pots

destination-pattern 6001

incoming called-number 500

direct-inward-dial

port 0/2/1:23

forward-digits all

!

end

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!  CME Router 2

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!

network-clock-participate wic 1

!

isdn switch-type primary-ni

!

controller T1 0/1/1

framing esf

clock source internal

linecode b8zs

mode cas

ds0-group 0 timeslots 1 type fxo-ground-start

no shut

!

voice-port 0/3/0

signal groundStart

description 6000

station-id number 6000

no shut

!

voice-port 0/3/1

signal groundStart

description 6001

station-id number 6001

no shut

!

dial-peer voice 6000 pots

destination-pattern 6000

port 0/3/0

!

dial-peer voice 6001 pots

destination-pattern 6001

port 0/3/1

!

dial-peer voice 5000 pots

destination-pattern 5000

incoming called-number 600

direct-inward-dial

port 0/1/1:23

forward-digits all

!

dial-peer voice 5001 pots

destination-pattern 5001

incoming called-number 600

direct-inward-dial

port 0/1/1:23

forward-digits all

!

end

Thanks to read me, if you have any comments or help, don't hesitate!

Christophe

1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Gold

Problems with a T1 CAS back-to-back configuration with fxs port

Cannot connect fxo to fxo. One side must be fxs.

2 REPLIES
Hall of Fame Super Gold

Problems with a T1 CAS back-to-back configuration with fxs port

Cannot connect fxo to fxo. One side must be fxs.

New Member

Problems with a T1 CAS back-to-back configuration with fxs port

Thanks for your help Paolo,

This is so logical! I've think about this when i wrote this message...

I'm back on tuesday.

I'll try with one side fxo and fxs to the other!

thanks a lot

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