[cisco-voip] overlap-recieving and empty DNIS

[Martin Lohnert]

Hi fellas,
I'm pulling my hair out because of a CME installation in Austria. We have to
use overlap-recieving on an ISDN line, since local telco sends us DNIS
digits in sequence (they send 4-digit extension numbers, without any
prefix). This works fine on its own, but because the national dial-plan is
not fixed length, we get call setups to the main office number without any
DNIS information (if someone dials the office number without the 4 digit ext
number) and they are to be routed to one of the ip phones (reception) This
again works on its own via a dial-peer with "incoming called-number ." and a
translation profile, but it breaks overlap-receiving - the call gets routed
to reception after ANY first digit is received... An example:

SCENARIO1:--------------------
!
dial-peer voice 7 pots
 incoming called-number .T
 direct-inward-dial
!
- call to 27381-3039 (overlap-receiving) rings on ext 3039 (works OK)
- call to 27381 (we recieve no DNIS) fails, call gets disconnected
----------------------------------------
SCENARIO2:---------------------
!
dial-peer voice 7 pots
 incoming called-number .
 translation-profile incoming RECEPTION
 direct-inward-dial
 port 1/0/1
!
- (transation profile translates called number to 2739 (receptionist)
- call to 27381 (we recieve no DNIS) succeeds, rings on 2739
- any calls to 27381-XXXX also ring on 2739
-----------------------------------------

So the bottom line is, is it possible to have overlap-receiving working, and
at the same time be able to terminate calls without DNIS (Called Number)
info?

Cheers,
Martin
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