[c-nsp] DS-3 Module and Cable for Cisco 2800/7200 Series Router

[Robert Boyle]

At 08:45 AM 6/11/2007, you wrote:
>Can anyone suggest the right DS-3 module and cable for Cisco 7200 
>and 2800 series routers.
>
>As per Cisco documentation, a PA-E3 can be used for 7200 and a 
>NM-1T3/E3 for 2800 series.

1. If you are going to terminate a DS3 for a point to point 
connection running frame relay, HDLC, or PPP, you will want a PA-T3 
or PA-2T3 or a more modern version such as a PA-T3+ or PA-2T3+.

2. If you are terminating a DS3 to break it down into channelized T1 
circuits, then you will want a PA-MC-T3 or PA-MC-T3+ or a PA-MC-2T3+

3. If you are using this for ATM then you will want a PA-A3-T3 or 
PA-A6-T3 (the newer version)

If you are using a DS3 to connect the 7200 and 2800 via a 
point-to-point DS3 from the phone company, then option 1 above will 
likely be the correct choice for you.

>Please can anyone comment of this, also would appreciate any 
>suggestion on the cables to be used to connect to these cards and to 
>the supplier's termination equipment.

You will need two 75 ohm cables with BNC connectors. You may also 
need attenuators for the RX side of your card since many Cisco cards 
have problems with overdriving the receive circuitry. These can be 
found online and many sources have been given in the past which 
should easy to find in the list archives.

-Robert



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