[asterisk-users] billed calls when cellullar phone is unreachable

[Simone Cittadini]

We have a customer routing calls trough a pri (digium board), our system 
then terminates the calls in various places (let say we offer LCR).

When we route a call to an unreachable cellular phone we know it cause 
we get a particular ${HANGUPCAUSE} so we don't bill that call even if 
billsec is > 0 (the duration of the "cellular is unreachable bla bla" 
message),  but the customer says their system too records the call as > 
0 and their expected behaviour is to have the call recorded as duration 
== 0.
(I'm supposing the customer is noticing the cellphones cause of the high 
traffic, but probably this happens also with other kind of "service 
messages" which aren't to be billed, have to try)

Now, is there some standard (we are in italy) which as to do with AMA 
codes / PRI_CAUSE / HANGUPCAUSE whatever that "non asterisk" systems 
expects to work right or have I to go trough "try everything comes to 
mind until it works" ?

for example setting some PRI_CAUSE on the channel based on the type of 
the HANGUPCAUSE I see ?

Why this seems to me a problem of the customer but I'm resolving it ?

that's roughly the extension :


exten => _X.,1,AGI(agi://127.0.0.1:54321/SomeAgiHere?someArgumentsHere)
exten => _X.,n,GotoIf($["${CALLABLE}"="TRUE"]?chkmax:hangup)
exten => _X.,n(chkmax),Set(GROUP()=${TECH_PRE})
exten => _X.,n,GotoIf($[${GROUP_COUNT(${TECH_PRE})} >= 
${MAX_CALLS}]?hangup:dial)
exten => _X.,n(dial),Dial(${STR_DIAL})
exten => _X.,n(hangup),Hangup

exten => h,1,Set(CDR(userfield)=${USERFIELD}-${HANGUPCAUSE})