[asterisk-r2] [B1 vs B6, PROBLEM WITH CALLS]

[Juan Pablo Villarreal Montoya]

Hello

I'm asking for help with this issue.

I have an asterisk box, connected to a legacy PBX through 2 E1 R2.  Almost
everything is ok.
I have noticed that when a call goes  to an available extension, the call is
established without problem. But when a call goes to a busy extension, i see
an error on my asterisk cli.  This is the error:

[Aug 29 18:30:42] ERROR[4950] chan_dahdi.c: Chan 2 - Protocol error. Reason
= Invalid Multi Frequency Tone, R2 State = Seize ACK Received, MF state =
Category Transmitted, MF Group = Forward Group II, CAS = 0x0C
DNIS = 4125, ANI = 25581838, MF = 0x31



Now, This is the las part of the call log of a dropped call, I think the
highlighted line is the one I'm having problems with.

[Aug 29 18:30:42] DEBUG[4950] chan_dahdi.c: Chan 2 - Sending more ANI
unavailable
[Aug 29 18:30:42] DEBUG[4950] chan_dahdi.c: Chan 2 - MF Tx >> F [ON]
[Aug 29 18:30:42] DEBUG[4950] chan_dahdi.c: Chan 2 - MF Rx << 3 [ON]
[Aug 29 18:30:42] DEBUG[4950] chan_dahdi.c: Chan 2 - MF Tx >> F [OFF]
[Aug 29 18:30:42] DEBUG[4950] chan_dahdi.c: Chan 2 - MF Rx << 3 [OFF]
[Aug 29 18:30:42] DEBUG[4950] chan_dahdi.c: Chan 2 - Sending category
National Subscriber
[Aug 29 18:30:42] DEBUG[4950] chan_dahdi.c: Chan 2 - MF Tx >> 1 [ON]
[Aug 29 18:30:42] DEBUG[4950] chan_dahdi.c: Chan 2 - MF Rx << 1 [ON]
[Aug 29 18:30:42] DEBUG[4950] chan_dahdi.c: Chan 2 - MF Tx >> 1 [OFF]
[Aug 29 18:30:42] DEBUG[4950] chan_dahdi.c: Chan 2 - MF Rx << 1 [OFF]
[Aug 29 18:30:42] ERROR[4950] chan_dahdi.c: Chan 2 - Protocol error. Reason
= Invalid Multi Frequency Tone, R2 State = Seize ACK Received, MF state =
Category Transmitted, MF Group = Forward Group II, CAS = 0x0C
DNIS = 4125, ANI = 25581838, MF = 0x31



Now this is the last part of a call log where everything is ok.

[Aug 29 18:32:39] DEBUG[4959] chan_dahdi.c: Chan 6 - Sending more ANI
unavailable
[Aug 29 18:32:39] DEBUG[4959] chan_dahdi.c: Chan 6 - MF Tx >> F [ON]
[Aug 29 18:32:39] DEBUG[4959] chan_dahdi.c: Chan 6 - MF Rx << 3 [ON]
[Aug 29 18:32:39] DEBUG[4959] chan_dahdi.c: Chan 6 - MF Tx >> F [OFF]
[Aug 29 18:32:39] DEBUG[4959] chan_dahdi.c: Chan 6 - MF Rx << 3 [OFF]
[Aug 29 18:32:39] DEBUG[4959] chan_dahdi.c: Chan 6 - Sending category
National Subscriber
[Aug 29 18:32:39] DEBUG[4959] chan_dahdi.c: Chan 6 - MF Tx >> 1 [ON]
[Aug 29 18:32:39] DEBUG[4959] chan_dahdi.c: Chan 6 - MF Rx << 6 [ON]
[Aug 29 18:32:39] DEBUG[4959] chan_dahdi.c: Chan 6 - MF Tx >> 1 [OFF]
[Aug 29 18:32:39] DEBUG[4959] chan_dahdi.c: Chan 6 - MF Rx << 6 [OFF]
[Aug 29 18:32:39] WARNING[4959] chan_dahdi.c: Unable to enable echo
cancellation on channel 6 (No such device)
[Aug 29 18:32:39] VERBOSE[4959] chan_dahdi.c: MFC/R2 call has been accepted
on forward channel 6
[Aug 29 18:32:39] VERBOSE[4959] app_dial.c:     -- DAHDI/6-1 is ringing


I don't know if the highlighted lines refer to gorup B Backward signals (B1
and B6), the thing is that when I receive a B1 the call gets dropped, and I
don't know which parameter adjust to solve this issue.

Thanks in advance



-- 
Juan Pablo Villarreal
Ingeniero Electrónico
email: jvillarreal at opengroupsa.com
Santiago de Cali
Colombia
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.digium.com/pipermail/asterisk-r2/attachments/20110829/5ca28361/attachment.htm>