[Asterisk-Users] delay on pri dialling when asterisk is spliced between E1-Pri and legacy pbx

[Frank Sautter]

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