[cisco-voip] back to back pri

[Kevin Thorngren]

You will need to do the following....

- T1 crossover cable
- One side should provide clocking by using the "clock source internal" 
on the T1/E1 ocntroller
- One side will need to be the ISDN User Side (default) and you will 
need to configure the other side as the ISDN Network Side with the 
following command under the serial interface: "isdn protocol-emulate 
network"

For example:

controller T1 3/0
  framing esf
  clock source internal
  linecode b8zs
  pri-group timeslots 1-24

interface Serial3/0:23
  no ip address
  encapsulation hdlc
  isdn switch-type primary-ni
  isdn protocol-emulate network
  isdn incoming-voice voice
  no cdp enable

Kevin

On May 7, 2006, at 10:37 AM, mohammad mirzaee wrote:

> Hi;
>
>
> Anybody knows how can I do back to back with isdn pri?
>
>
>
> Regards
> Mohammad
>
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