[c-nsp] PA-POS-1OC3 vs. PA-A3-OC3SMI

[Justin M. Streiner]

On Thu, 18 Sep 2008, David Aldworth wrote:

> We are looking for a fully channelized OC3 interface for a Cisco 7200 VXR. 
> Something that we can break individual T1's off of. In researching this there 
> are two routes: PA-POS-1OC3 or PA-A3-OC3SMI. The first is SONET and the 
> second is ATM.
>
> Other than price what is the difference? Which is needed?

I don't believe either interface supports anything other than concatenated 
operation, i.e. a full 155 Mb/s interface; you can't break the OC3 into 
its component STS slots to break out DS3, CT3, T1, etc...

Also, the interface you'd buy would be determined by the transport type. 
A POS OC3 interface might be able to physicall terminate a ATM OC3, but it 
won't be able do any of the ATM stuff.

jms