[asterisk-users] Some IAX calls do not disconnect.

[Rajkumar S]

Hello,

I have a 3 server asterisk configuration where one asterisk (say A) (v
1.4.25) has a digiuim card connected to E1 from which calls are routed
to another asterisk server  (B) (1.6.0.9) over IAX trunk from which
calls get routed to third server (C) (1.6.0.9) again via IAX trunk.
SIP clients are connected to third server. A is the PSTN termination
server, B runs the menu and AGI and C is where SIP clients connect.
SIP clients can also dial outside and call goes like C -> B -> A ->
PSTN.

Every day evening I find that there are about 30 calls in B which is
not disconnected. This comprise of both calls from B -> A as well as B
-> C. There are no such lingering calls in A or C.

Every day I manually disconnect the calls, shown below are two example
with first one from B -> C and second B -> A.

a16-in1*CLI> soft hangup IAX2/a16-in1-11080
Requested Hangup on channel 'IAX2/a16-in1-11080'
    -- Hungup 'IAX2/a16-in1-a16-q1-16420'
  == Spawn extension (queue, s, 20) exited non-zero on 'IAX2/a16-in1-11080'
    -- Hungup 'IAX2/a16-in1-11080'

a16-in1*CLI> soft hangup IAX2/a16-in1-903
Requested Hangup on channel 'IAX2/a16-in1-903'
    -- Hungup 'IAX2/a16-in1-sangoma-flip-outgoing-16393'
  == Spawn extension (inbound-calls, outbound, 1) exited non-zero on
'IAX2/a16-in1-903'
    -- Hungup 'IAX2/a16-in1-903'

in iax.conf of B the entries are like:

[general]
bindport = 4569
bindaddr = 0.0.0.0
disallow=all
allow=ulaw
jitterbuffer=no
forcejitterbuffer=no

[a16-in1-a16-q1]
type=peer
host=192.168.79.176
auth=plaintext
secret=password
username=a16-q1
qualify=yes
trunk=yes

in C the corresponding entry is:
[general]
bindport = 4569
bindaddr = 0.0.0.0
disallow=all
allow=ulaw
jitterbuffer=no
forcejitterbuffer=no

[a16-q1]
type=user
auth=plaintext
secret=password
context=inbound-calls
qualify=yes
trunk=yes

I do not know where even to start. Any idea to resolve this would be
much appreciated.

raj