[asterisk-users] Subscribe Problem - Zombie Channel

[dotnetdub]

Hi List,

Asterisk 1.4.22 built by root @ carl on a i686
Purely SIP
Linksys SPA962 with 932 sidecar and also Cisco SPA508 / 525G with Sidecars

Have an issue with this happening with a number of my customers.

Customer hits the ringing BLF on the sidecar to pickup the call incoming on
another handset.

Not always but enough to cause me a problem it leaves a channel open.

At the moment, this is the output from core show channels on one of the
affected sites:

core show channels
Channel              Location             State   Application(Data)

SIP/102--08e1 *8 at from-inside Down    (None)
SIP/102--08d6 *8 at from-inside Ring    (None)
SIP/102--08d7 *8 at from-inside Ring    (None)
3 active channels
0 active calls


I can't get rid of them, if I:
soft hangup SIP/102--08e149c0
Requested Hangup on channel 'SIP/102--08e149c0'

and thats all that happens.

core show channels
Channel              Location             State   Application(Data)

SIP/102--08e1 *8 at from-inside Down    (None)
SIP/102--08d6 *8 at from-inside Ring    (None)
SIP/102--08d7 *8 at from-inside Ring    (None)
3 active channels
0 active calls

The only way to free them up is to force a restart.

restart now

Any clues on how I can debug this and try to sort it or even if anyone has
come across this.

Many thanks in advance.

Brian
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