[VoiceOps] ITFS Term vendor question

Larry Sheldon larrysheldon at cox.net
Fri Sep 19 02:55:23 UTC 2014

On 9/17/2014 16:59, Jay Ashworth wrote:
> ---- Original Message -----
>> From: "Nick Crocker" <nick.crocker at gmail.com>
>> Can someone shed some light on how you might be accomplishing this, I have
>> a hard time believing that customers are being told they cannot dial TF
>> numbers in their own country.
> In the US, it's always been my understanding that what we call INWATS calls
> are dipped *at the originating CO*, and the actual toll call across the
> SS7/TDM backbone goes out using either the real 10D DN of the target line,
> or some fake 10D that routes to the appropriate trunk group somehow at the
> destination end.
> So it's not that unusual to me that a network that is interfacing at
> Class 4, instead of Class 5, might be unable to originate calls to TF DNs.
> I admit to not being sure this is a worldwide view of the issue, as our
> Wikipedian friends would say, though.

I don't think I ever know the details of automatic TF routing, but I'm 
pretty sure that in California Zenith and Enterprise numbers were 
translated by R & R and sent collect.  Zenith 9000 is the only exception 
I know of.

Operator 25 (?) calls were just sent collect to the CB number.

In-WATS was purchased for particular areas (rest-of-the-state, for 
example) and calls from a point not paid-for simply would not translate.

The unique Characteristics of System Administrators:

The fact that they are infallible; and,

The fact that they learn from their mistakes.

More information about the NANOG mailing list