Mailing List Archive: Back to Back ISDN PRI connection.

Back to Back ISDN PRI connection.

Oct 1, 2003, 5:05 AM

Post #1 of 4 (1076 views)

Hi,

is there a possibility to connect two Cisco E1 interfaces back-to-back supporting ISDN PRI
capabilities ?

One side is AS5300 with 4 Channelized E1/PRI ports, other is 3640 with High Density Voice Port
adapter, E1 (1 Port) Multi-Flex Trunk WAN Daughter Card.

Purpose is to simulate analog modem calls coming into 3640 via FXS, coming over E1 to AS5300
terminated on MICA modem.

Thank you for answer.

Kristian Liptak

Re: Back to Back ISDN PRI connection. [ In reply to ]

Aaron at cisco

Oct 1, 2003, 9:42 AM

Post #2 of 4 (1065 views)

Permalink

> >is there a possibility to connect two Cisco E1 interfaces back-to-back
> >supporting ISDN PRI
> >capabilities ?
> >
> >One side is AS5300 with 4 Channelized E1/PRI ports, other is 3640 with
> >High Density Voice Port
> >adapter, E1 (1 Port) Multi-Flex Trunk WAN Daughter Card.
> >
> >Purpose is to simulate analog modem calls coming into 3640 via FXS, coming
> >over E1 to AS5300
> >terminated on MICA modem.

> The command <isdn protocol-emulate network> allows for back-to-back
> connections by emulating the network side.

> mark

A couple other tips:

- For E1, use primary-net5 switchtype (if T1, use primary-NI)

- To avoid clock slips, set one side to freerun and the other side to
be loop timed. See http://www.cisco.com/warp/public/116/sgl_clocking.html .

Aaron

Re: Back to Back ISDN PRI connection. [ In reply to ]

mljohnso at cisco

Oct 1, 2003, 10:27 AM

Post #3 of 4 (1067 views)

Permalink

At 02:05 PM 10/1/2003 +0200, Liptak Kristian wrote:
>Hi,
>
>is there a possibility to connect two Cisco E1 interfaces back-to-back
>supporting ISDN PRI
>capabilities ?
>
>One side is AS5300 with 4 Channelized E1/PRI ports, other is 3640 with
>High Density Voice Port
>adapter, E1 (1 Port) Multi-Flex Trunk WAN Daughter Card.
>
>Purpose is to simulate analog modem calls coming into 3640 via FXS, coming
>over E1 to AS5300
>terminated on MICA modem.

The command <isdn protocol-emulate network> allows for back-to-back
connections by emulating the network side.

mark

Re: Back to Back ISDN PRI connection. [ In reply to ]

liptak at bgs

Oct 6, 2003, 3:06 AM

Post #4 of 4 (1062 views)

Permalink

If there is someone interested, I can send the configs of the working setup.

PC - analog modem - 2wire - FXS - 3600 - E1 - E1 cross cable - E1 - AS5300 - MICA modem

PC is able to dial over FXS into AS5300 via E1 timeslot (3600 act as a PBX).

Thanks to Aaron Leonard and Mark Johnson.

Kristian