asterisk users - Jul 2005 - delay on pri dialling when asterisk is spliced between E1-Pri and legacy pbx

hello everybody,

one of our customers which wants a soft transfer between his old pbx to 
asterisk and sip. the setup is as follows:
   telco <---pri---> asterisk <---pri---> legacy pbx
everything is fine exept that when dialling from the legacy pbx it takes 
about 3 seconds before the asterisk start to dial.
where does this delay come from?
has it to do with 'overlapdial=yes'?

here is an excerpt from the logfile (i assume the number is dialled 
enbloc as it come with the redial function of the legacy pbx):

2005-07-28 17:23:37 VERBOSE[13873] logger.c:     -- Accepting overlap 
call from '070314161XXX' to '<unspecified>' on channel
0/1, span 2
2005-07-28 17:23:37 VERBOSE[13997] logger.c:     -- Starting simple 
switch on 'Zap/32-1'
2005-07-28 17:23:40 VERBOSE[13997] logger.c:     -- Executing 
Dial("Zap/32-1", "ZAP/g1/0172XXXXXXX") in new stack
2005-07-28 17:23:40 VERBOSE[13997] logger.c:     -- Requested transfer 
capability: 0x00 - SPEECH
2005-07-28 17:23:40 VERBOSE[13997] logger.c:     -- Called g1/0172XXXXXXX
2005-07-28 17:23:41 DEBUG[13872] chan_zap.c: Queuing frame from 
PRI_EVENT_PROCEEDING on channel 0/1 span 1
2005-07-28 17:23:41 VERBOSE[13997] logger.c:     -- Zap/1-1 is 
proceeding passing it to Zap/32-1
2005-07-28 17:23:41 DEBUG[13997] chan_zap.c: Requested indication 15 on 
channel Zap/32-1
2005-07-28 17:23:41 DEBUG[13997] chan_zap.c: Received 
AST_CONTROL_PROCEEDING on Zap/32-1

regards
  frank

> one of our customers which wants a soft transfer between his old pbx to
> asterisk and sip. the setup is as follows:
>    telco <---pri---> asterisk <---pri---> legacy pbx
> everything is fine exept that when dialling from the legacy pbx it takes
> about 3 seconds before the asterisk start to dial.
> where does this delay come from?
> has it to do with 'overlapdial=yes'?
This is normal behaviour if you use '.' in your extensions.conf. Use
'!'
instead and Asterisk will start dialing immediately.

Maik Schmitt

On Thu, 28 Jul 2005, Frank Sautter wrote:
> one of our customers which wants a soft transfer between his old pbx to 
> asterisk and sip. the setup is as follows:
>    telco <---pri---> asterisk <---pri---> legacy pbx
> everything is fine exept that when dialling from the legacy pbx it takes 
> about 3 seconds before the asterisk start to dial.
> where does this delay come from?
> has it to do with 'overlapdial=yes'?
> 
> here is an excerpt from the logfile (i assume the number is dialled 
> enbloc as it come with the redial function of the legacy pbx):
The three second delay sounds like the dial timeout - i.e. asterisk is for 
some reason waiting for mor digits. One cause can be that the dialplan 
contains a wildcard match "." which can match any number of digits, or
the
dialplan can be ambigous (e.g. containing both 345 and 3456 as 
extensions).

Instead of using "." in the dialplan (and if the outgoing leg can
handle
overlap digits) you can use "!" instead of ".". The
exclamation point is a
different wildcard that matches immediatly if it is the only possible 
extension remaining.

Normally the "no more digits" marker from the incoming leg would
trigger a
"." wildcard to match immediatly. Perhaps the pbx sends the number as 
overlap digits, or at least does not set the end of number marker?

Things are much easier to diagnose with a pri intense debug log.

Peter