I have a 5350 and i want to connect 2 T1 back to back ( loop ). Is it possible to connect like this or not . I am expecting VoIP calls from ethernet and will go into 1 T1 and will come out from other and then will send it where i want. It will be a great help if i get the working config or the link which explains this, i did an extensive search but couldnot get anything like this on cisco site. Help will be appriciated. Thanks
It is possible ... any particular reason why you want to do this ? If you are doing VOIP to POTS and then POTS to VOIP this will be a double compression cycle and the voice quality will drop noticebly, as well as the latency (delay) of the call doubling.
We really would not recomend this ...
If you must do it , you would use a T1 loopback cable to cross over the TX and RX pairs :
1 ---- 4
2 ---- 5
4 ---- 1
5 ---- 2
and set up one port as internal clocking to drive the second port.
PRI would be the best signalling, so one D channel would be need to be configured as ISDN layer 3 network side as well.
You would use POTS dial peers to direct the call out, and if necessary manipulate the digits so a VOIP dial peer can redirect the call to a new destination.
Thanks a lot for your reply. I did the same config but i was making sure is it the right way. For ISDN layer 3 Network we have the only option of configuring the Switch type primary-net3, it supports Network side setup as well.
The reason for doing such thing is i am expecting many calls from different providers to my network. I want to make a POP for them to send the calls to just one gateway and from there i will send it to its ultimate destinations. Any other openion about this will be appricaited. Thanks
Would need to see complete router configs to see how things are set up. Either paste them here, or better still open a TAC case on this issue. Also, set the debug timestamps to the msec - in config mode add:
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...