asterisk users - Mar 2006 - AAH: DNID not set if caller suppresses CID?

Hi,

using asterisk@home, with quadBri from junghanns.net I am facing a 
strange problem:
I have set incoming routes for some extension / DID:
[ext-did]
include => ext-did-custom
exten => 23,1,SetVar(FROM_DID=23)
exten => 23,2,Goto(ext-local,23,1)
exten => 57,1,SetVar(FROM_DID=57)
exten => 57,2,Goto(ext-local,57,1)
exten => 66,1,SetVar(FROM_DID=66)
exten => 66,2,Goto(ext-local,66,1)

If I call from external to my * with ext 57 eveything works as expected, 
as long as I don't suppress my clid. Doing this, my call will not be 
routed to ext 57, but instead to the 'default' extension.
Asterisk full log with clid:

Mar 26 18:02:21 DEBUG[3582] chan_sip.c: Auto destroying call 
'zukv2Ul4VuP5lU1w@192.168.149.123'
Mar 26 18:02:32 VERBOSE[3572] logger.c:     -- Accepting voice call from 
'177XXXX' to '57' on channel 0/1, span 3
Mar 26 18:02:32 DEBUG[3572] chan_zap.c: Enabled echo cancellation on 
channel 7
Mar 26 18:02:32 VERBOSE[7387] logger.c:     -- Executing 
SetVar("Zap/7-1", "FROM_DID=57") in new stack
Mar 26 18:02:32 VERBOSE[7387] logger.c:     -- Executing
Goto("Zap/7-1",
"ext-local|57|1") in new stack
[...]
the same w/o CLID:
Mar 26 17:27:37 VERBOSE[3570] logger.c:     -- Accepting voice call from 
'' to 's' on channel 0/1, span 1
Mar 26 17:27:37 DEBUG[3570] chan_zap.c: Enabled echo cancellation on 
channel 1
Mar 26 17:27:37 DEBUG[7284] pbx.c: Expression result is '1'
Mar 26 17:27:37 VERBOSE[7284] logger.c:     -- Executing 
GotoIf("Zap/1-1", "1?from-pstn-reghours|s|1:") in new stack
Mar 26 17:27:37 VERBOSE[7284] logger.c:     -- Goto (from-pstn-reghours,s,1)
Mar 26 17:27:37 DEBUG[7284] pbx.c: Expression result is '0'
Mar 26 17:27:37 VERBOSE[7284] logger.c:     -- Executing 
GotoIf("Zap/1-1", "0?from-pstn-reghours-nofax|s|1:2") in new
stack
Mar 26 17:27:37 VERBOSE[7284] logger.c:     -- Goto (from-pstn-reghours,s,2)
Mar 26 17:27:37 VERBOSE[7284] logger.c:     -- Executing 
Answer("Zap/1-1", "") in new stack
Mar 26 17:27:37 DEBUG[7284] chan_zap.c: Engaged echo training on channel 1
Mar 26 17:27:37 VERBOSE[7284] logger.c:     -- Executing
Wait("Zap/1-1",
"1") in new stack
Mar 26 17:27:38 VERBOSE[7284] logger.c:     -- Executing 
SetVar("Zap/1-1", "intype=EXT-23") in new stack
Mar 26 17:27:38 VERBOSE[7284] logger.c:     -- Executing
Cut("Zap/1-1",
"intype=intype|-|1") in new stack

Can someone give me a hint what went wrong?
TIA,

Rgds,
Hans

Hi,

just to complete this thread if someone faces a similiar problem:
The missing DID is caused by our telco company. It only happens when 
having two different ptp lines (with different numberblocks) and calling 
from one of these to the other. Calls from any other line in the world 
come in with the DID set to the correct extension.

Rgds,
Hans