Re: OT: ICM "NIC" interface type

NIC stands for Network Interface COntroller, but remember that ICM is
telephony software (pre voip, if you will).
So "Network" is the network like the last N in PSTN.

And "routing" is call routing. ICM has a "prerouting" mode where it
gets the call signal from the PSTN before the PSTN decides where to
route the call to, and ICM can return a label that the PSTN in turn
uses to decide call routing.

When doing "postrouting" you get the switch to tell ICM "I received this
new call" by some form of private channel, via a PG which serves as a
medium.

NICs are carrier dependent. Some are serial, some are IP, some might
have special purpose hardware.
And AFAIK, they are on the way out, since carriers bill prerouting
and there are new ways to send the call to the right place nowadays.

-Carlos

Radioactive Frog @ 23/04/2009 10:23 -0200 dixit:
> I was studying some doc on Cisco ICM and the manual doesn't tell what the
> hell is "NIC" (not network interface card, it means something else) on ICM.
> SRND keep saying that ICM "NIC" connects to PSTN for pre/post routing
> scenario but what interface does this ICM "NIC" has /? - E1/Ethernet or what
> ?
> how does call flow works with it?
> It's taking my sleep away. I have got headache already.
>
> Anybody ever came across this and be kind to explain?
>
> frog
>
>
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-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net