[Asterisk-Users] Identify call router? How?

[Rich Adamson]

> > > I have a machine in my office, it is labelled Cable and Wireless, and on
> > > the back it says, SMarT-1
> > > I have searched the web, and no joy. It connects to a PC via a serial
> > > cable, has anyone heard of such a device?
> > 
> > Sounds like a CSU/DSU that C&W installed for some service.

CSU = Customer Service Unit
DSU = Data Service Unit

Essentially, CSU/DSU's are high speed modems, converting logical bits sent
from a device (eg, PC) into appropriate 56k or T1 modulation schemes that
are based on telephony standards.