When asterisk receives those messages you hear when calling an
unreacheable cellular phone it sends a 'connect' over the terminating
PRI line (digium TE410P), making the call seen as billed from customer's
perspective.
I don't know if this behaviour is a bug or something I can resolve with
some fine tuning, so I'm sending to both lists.
Since the calls comes from a SIP connected GSM gateway, is there some
SIP code which corresponds to the 'pass audio but don't connect' we want
here ?
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})
Here the provider's trace of a call answered by asterisk :
/HDLU 4/Port
=== LAPD ===
--- ADDRESS ---
SAPI : 0 = call control procedures
CR : ......1.
EA0 : .......0
TEI : 0 = non-automatic TEI assignment user equipment
EA1 : .......1
--- CONTROL ---
--- I FRAME ---
I FORMAT : .......0
N(S) : 86
P : .......0
N(R) : 31
=== ETSI ISDN ===
PROT DISC : 08h = Q.931 user-network call control message
LEN CALL R : 2
SPARE : 0
FLAG : 1....... = the message is sent to the side that
originates the call reference
CALL REF : 226
MESS TYPE : 07h = Connect
Here the complete trace :
/HDLU 4/Port
0 TEI: 0 CALL REF: 226 Setup '500' '[called number]'
0 TEI: 0 CALL REF: 226 Setup acknowledge
0 TEI: 0 CALL REF: 226 Call proceeding
0 TEI: 0 CALL REF: 226 Connect <== should not
0 TEI: 0 CALL REF: 226 Connect acknowledge
0 TEI: 0 CALL REF: 226 Disconnect 16 normal call clearing
0 TEI: 0 CALL REF: 226 Release
0 TEI: 0 CALL REF: 226 Release complete
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Here a trace from a correctly functioning non-voip system :
/HDLU 4/Port
0 TEI: 0 CALL REF: 246 Setup '500'
0 TEI: 0 CALL REF: 246 Setup acknowledge
0 TEI: 0 CALL REF: 246 Information 'c'
0 TEI: 0 CALL REF: 246 Information 'a'
0 TEI: 0 CALL REF: 246 Information 'l'
0 TEI: 0 CALL REF: 246 Information 'l'
0 TEI: 0 CALL REF: 246 Information 'e'
0 TEI: 0 CALL REF: 246 Information 'd'
0 TEI: 0 CALL REF: 246 Information 'n'
0 TEI: 0 CALL REF: 246 Information 'u'
0 TEI: 0 CALL REF: 246 Information 'm'
0 TEI: 0 CALL REF: 246 Information 'b'
0 TEI: 0 CALL REF: 246 Call proceeding
0 TEI: 0 CALL REF: 246 Progress
0 TEI: 0 CALL REF: 246 Progress
0 TEI: 0 CALL REF: 246 Disconnect 16 normal call clearing
0 TEI: 0 CALL REF: 246 Release
0 TEI: 0 CALL REF: 246 Release complete
--
Simone Cittadini
2K Elektronika
Tel +39.02.26265583
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