[cisco-voip] PRI Inbound and Two-Stage Dialing

[Anthony Holloway]

A few years ago, Cisco introduced us to the Toll Fraud prevention changes
in 15.1(2)T
<https://www.google.com/search?q=cisco+ios+15.1%282%29+toll+fraud>, and one
of the changes was dealing with two-stage dialing.

Pre-15.1(2)T, two-stage dialing was the default behavior on an inbound POTS
dial-peer for calls coming in from a PRI.

You would have to use the following command to switch to one/single stage
dialing:

*direct-inward-dial*

Once the toll fraud change came through, you no longer needed to do this.
However, if you upgraded or typed it in new, no harm done either.

I was just helping a co-worker on a new ISR 4431 running 16.6(4), and he
was getting two-stage dialing for inbound calls to his PRI, with an inbound
dial-peer like:

*dial-peer voice 1100 pots*
* translation-profile incoming lets-do-this*
* incoming called-number .*
*!*

It wasn't until we put the DID command on the dial-peer that it started to
behave correctly.

Did Cisco change back to defaulting to two-stage dialing?  Internet
searches, and bug search tool searches are not showing me that it has.
Anyone here know what's up?
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