[Asterisk-Users] quadBRI

[tim]

 Hello Asterisk users.

  We have a quadBRI card installed and have the following problem. When 
starting Asterisk, the card is up and works perfect. But if no one uses 
it for 2-3 hours, the card seems to change status. If I try making a 
call from my sip phone to an extarnal telephone then asterisk registers 
that I'm trying to call, i.e. it's not a bridged but a show channels 
gives this output:
        Channel  (Context    Extension    Pri )   State Appl.         Data
        Zap/1-1  (isdn-ingresso s            1   ) Dialing AppDial       
(Outgoing Line)
        SIP/116-c24d  (from-sip   03926969736  1   )    Ring 
Dial          ZAP/g1/3923333736|30|t
        2 active channel(s)
But in the sip phone there is only silence exept for som weak clicking 
sound.
  If instead I make the call from outside, then the sip phone rings, 
when I answer, in the sip phone there is absolute silence and the 
calling phone keeps ringing. Asterisk says that the call is up, i.e. 
bridged.

  Does anyone know anything about this syndrome? Below are the conf 
files involved.

[from-sip]
exten => _0.,1,Dial(ZAP/g1/${EXTEN:1},30,t)
[isdn-ingresso]
exten =>27380773,1,Dial(SIP/116,20,t)
exten => s,1,Answer
exten => s,2,Playback(pbx-invalid)
exten => s,3,Hangup

zapata.conf:
loadzone=nl
defaultzone=nl
span=1,1,3,ccs,ami
span=2,0,3,ccs,ami
span=3,0,3,ccs,ami
span=4,0,3,ccs,ami
bchan=1,2
dchan=3
bchan=4,5
dchan=6
bchan=7,8
dchan=9
bchan=10,11
dchan=12

zaptel.conf:
switchtype = euroisdn
echocancel=yes
echocancelwhenbridged=yes
echotraining=yes

rxgain=8.2
txgain=-1.0
signalling = bri_cpe_ptmp

pridialplan = local
prilocaldialplan = local

switchtype = euroisdn
signalling = bri_cpe_ptmp
pridialplan = local
context=isdn-ingresso
group = 1
channel => 1-2
switchtype = euroisdn
signalling = bri_cpe_ptmp
pridialplan = local
context=isdn-ingresso
group = 2
channel => 4-5
switchtype = euroisdn
signalling = bri_cpe_ptmp
pridialplan = local
context=isdn-ingresso
group = 3
channel => 7-8
switchtype = euroisdn
signalling = bri_cpe_ptmp
pridialplan = local
context=isdn-ingresso
group = 4
channel => 10-11