[Asterisk-Users] ISDN Data calls through *

[Stuart Hirst]

Dear All,

We have a setup with * acting as the intermediary between an LG GDK 34i with
PRI and a BT PRI with 8 channels.

LG-GDK-34i -> pri (E1 crossover cable) -> E100p -> Asterisk -> E100P -> BT
PRI

We have normal calls from both digital and analogue extensions working fine
on the GDK however we have a BRI ISDN router that makes data calls via the
GDK and the calls do not get connected. This used to work when the GDK was
directly connected to the BT PRI.

* sees the call and switches it through to the correct destination number
and the ISDN router sees the call as being answered however the call setup
does not seem to get completed.

I have tried using various Dial options such as "c" before the number for a
clear channel connection and "d" appended in the line selection to force the
connection to be digital...whatever that means. This seems to be related to
how we are bridging the ISDN call to the external destination.

Has anyone successfully done something similar and if so what was the
general approach.

Below is the relevant section from extensions.conf

exten => s,1,Answer ; Answer the line
exten => s,2,DigitTimeout,3 ; Set Digit Timeout to 3 seconds
exten => s,3,ResponseTimeout,10 ; Set Response Timeout to 10 seconds

exten => _X.,1,Dial(Zap/g1d/${EXTEN})
;exten => _X.,1,Dial(Zap/g1/c${EXTEN})

exten => _X.,2,Congestion
exten => t,1,Congestion

Below is the relevant sections from zapata.conf

context=incoming
switchtype=euroisdn
pridialplan=unknown
nationalprefix=0
internationalprefix=00
usecallerid=yes
hidecallerid=no
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
group=1
callgroup=1
pickupgroup=1
immediate=no
musiconhold=default
signalling = pri_cpe
channel => 1-8

context=outgoing
nationalprefix=0
internationalprefix=00
switchtype=euroisdn
pridialplan=unknown
;immediate=yes
group=2
overlapdial=yes
signalling = pri_net
channel => 32-39

An help would be appreciated.

Regards,

Stuart

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