[c-nsp] Channelized DS3 over SM fiber handoff

Seth Mattinen sethm at rollernet.us
Fri May 1 21:05:54 EDT 2009

Michael Ulitskiy wrote:
> Hello,
> We will need to terminate channelized DS3 circuit in 7200VXR router. 
> The problem is that DS3 is given to us by telco (Verizon) as a single-mode fiber.
> I have no experience with this kind of setup and actually limited experience with DS3 circuits.
> Has anybody done this before? How it's usually done?
> Is there a DS3 PA with fiber interface for 7200 routers (I don't see any) or I should use
> a media converter with PA-MC-T3? If so, can you recommend one?
> It seems that many media converters use proprietary DS3 encoding scheme and must be used in pairs
> (or at least I've been told so), but telco is unable to give us any recommendation on how
> we should terminate it on our end. 
> If anyone could share the experience on terminating DS3 over fiber handoff from Verizon, East Coast,
> I'd greatly appreciate it. Any pointers to appropriate documentation/tutorials/howtos/etc are also very welcome.
> Thanks a lot,

I've never seen anyone do that before with a DS3. Maybe they gave you


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