[nsp] What WIC to use with E1 service

[atticus at satanic.org]

> I need to send a router to Europe to connect to a E1 service, the router
> is going to be 1721. Here (NA) I would just use WIC-1DSU-T1, what is the
> equivalent for E1.

VWIC-1MFT-G703 is your best bet. Be sure to verify with your provider that
you will need to provide an E1 interface, as in some localities you'll get
V.35 at the demarc.

The module provides a RJ48 connector, so make sure you find out what the
presentation will be, as it can vary (see the cable options on the product
page for the part).

> Also what kind of framing should I ask the E1 to be set to?

That VWIC can do framed (crc4 or non-crc4) and unframed (G.703). If you
can arrange it, see if you can get the circuit provisioned as unframed (if
you have to go framed, you can save a bit by just going w/ VWIC-1MFT-E1).