[asterisk-r2] [r2 dropped calls]

[Moises Silva]

> [15:45:11:702] [Thread: 3044408208] [Chan 1] - M - Bits changed from 0x0C to
> 0x04
> [15:45:11:702] [Thread: 3044408208] [Chan 1] - M - CAS Rx << [ANSWER] 0x04
> [15:45:11:702] [Thread: 3044408208] [Chan 1] - M - Attempting to cancel
> timer timer 3
> [15:45:11:702] [Thread: 3044408208] [Chan 1] - M - timer id 3 found,
> cancelling it now
> [15:45:11:702] [Thread: 3044408208] [Chan 1] - M - Attempting to cancel
> timer timer 0
> [15:45:11:702] [Thread: 3044408208] [Chan 1] - M - Cannot cancel timer 0
> [15:45:26:842] [Thread: 3044408208] [Chan 1] - M - Bits changed from 0x04 to
> 0x08
> [15:45:26:842] [Thread: 3044408208] [Chan 1] - M - CAS Rx << [CLEAR FORWARD]
> 0x08
> [15:45:26:842] [Thread: 3044408208] [Chan 1] - M - Far end disconnected.
> Reason: Normal Clearing
> [15:45:26:844] [Thread: 3044408208] [Chan 1] - M - Attempting to cancel
> timer timer 0
> [15:45:26:844] [Thread: 3044408208] [Chan 1] - M - Cannot cancel timer 0
> [15:45:26:844] [Thread: 3044408208] [Chan 1] - M - CAS Tx >> [CLEAR FORWARD]
> 0x08
> [15:45:26:844] [Thread: 3044408208] [Chan 1] - M - CAS Raw Tx >> 0x09
> [15:45:26:859] [Thread: 3057417104] [Chan 1] - M - Bits changed from 0x08 to
> 0x0C
> [15:45:26:859] [Thread: 3057417104] [Chan 1] - M - CAS Rx << [CLEAR BACK]
> 0x0C
> [15:45:27:534] [Thread: 3057417104] [Chan 1] - M - Bits changed from 0x0C to
> 0x08
> [15:45:27:534] [Thread: 3057417104] [Chan 1] - M - CAS Rx << [IDLE] 0x08
> [15:45:27:534] [Thread: 3057417104] [Chan 1] - M - Call ended
> [15:45:27:534] [Thread: 3057417104] [Chan 1] - M - Attempting to cancel
> timer timer 0
> [15:45:27:534] [Thread: 3057417104] [Chan 1] - M - Cannot cancel timer 0
>
> ************************************************chan-1-forward-0-20110718154508.call********************************************************************************
>
>
> We have also used the "timers.cas_persistence_check=3000" parameter and the
> calls are dropped too.
>

The trace suggest that there is a problem at the physical layer
(redfone?) and caused a glitch in the CAS bits, is not ok to receive a
clear forward when we're the forward side, we should receive clear
backward. The only reason that comes to mind is that the bits were
reported as changed because of some problem in the line.

Moises Silva
Senior Software Engineer, Software Development Manager
Sangoma Technologies Inc. | 100 Renfrew Drive, Suite 100, Markham ON
L3R 9R6 Canada
t. 1 905 474 1990 x128 | e. moy at sangoma.com