flash transfer problem in asterisk integration with old PBX

Comment on Asterisk tips zap transfer
plink
Joined: Tue 07 of Nov, 2006

Re: flash transfer problem in asterisk integration with old PBX

Posted:Mon 27 of Nov, 2006 (11:07 UTC)
I've solved the problem changing the flash time in the zapata.conf file,
I've set:

flash = 200 (the defualt was 750 ms)

in the extensions.conf the code is for example:

exten => 42,1,Flash()
exten => 42,2,SendDTMF(42,250)
exten => 42,3,Hangup()

now the transfer with flash works correctly

plink
Joined: Tue 07 of Nov, 2006

flash transfer problem in asterisk integration with old PBX

Posted:Tue 07 of Nov, 2006 (14:55 UTC)
I've tried to transfer a call using the Flash command, but with my configuration it doesn't work.
I have a traditional PBX connected with a zap channel to Asterisk that acts like an IVR:

TELCO line --> traditional PBX (FXS) --> (FXO) Asterisk

From the TELCO line I can make a call to the traditional PBX and reach Asterisk, the IVR system on Asterisk answers the call and I can dial an extension (for example 42 that is on the traditional PBX). In the asterisk dialplan I've set to transfer the call using Flash() like in this example:

exten => 42,1,Flash()
exten => 42,2,Background(silence/1) wait 1 second for the traditional PBX
exten => 42,3,SendDTMF(42,250)
exten => 42,4,Background(silence/1) wait 1 second for the traditional PBX
exten => 42,5,Hangup()

When I dial the extension 42, the phone 42 on the traditional PBX rings but when I answer there isn't communication with the call from the TELCO line and after a few seconds the line hangup.
Here you can see what happen in asterisk CLI console:

Executing Answer("Zap/4-1", "") in new stack
— Executing BackGround("Zap/4-1", "a_suoni_plink/menu_esterno2") in new stack
— Playing 'a_suoni_plink/menu_esterno2' (language 'it')
== CDR updated on Zap/4-1
— Executing Flash("Zap/4-1", "") in new stack
— Flashed channel Zap/4-1
— Executing BackGround("Zap/4-1", "silence/1") in new stack
— Playing 'silence/1' (language 'it')
— Executing SendDTMF("Zap/4-1", "42") in new stack
— Executing BackGround("Zap/4-1", "silence/1") in new stack
— Playing 'silence/1' (language 'it')
— Executing Hangup("Zap/4-1", "") in new stack
== Spawn extension (incoming, 42, 5) exited non-zero on 'Zap/4-1'
— Hungup 'Zap/4-1'

I've tried the following changes to the dialplan in my example but transfer still doesn't work:

- I've tried to use wait(1) instead of Background(silence/1)

- I've tried without Background(silence/1) or wait(1):

exten => 42,1,Flash()
exten => 42,2,SendDTMF(42,250)
exten => 42,3,Hangup()

- I've tried without the Hangup() instructions at the end

Has anyone the same problem like me and any suggestions?