[asterisk-r2] MFC/R2 protocol error on chan 1: Seize Timeout

[Moises Silva]

On Wed, Feb 4, 2015 at 3:43 AM, Petya Minovska <p.minovska at balkantel.net>
wrote:

>  Hello,
>
> I have an Asterisk server and a multiplexer connected via E1 boards (TE133
> Digium for the server and Lomif for the multiplexer). I have connected a
> phone to the FXS board of the multiplexer and I am trying to make a call to
> it. Through dahdi_tool I can see the rx and tx CAS bits and when I change
> them I see it.
> Both rx CAS and tx CAS are in state 'idle', but when I try to make a call
> I see the following error in the CLI;
>
> * == Using SIP RTP CoS mark 5*
> *    -- Executing [812 at demo:1] Dial("SIP/101-00000015", "DAHDI/1/812,,tT")
> in new stack*
> *    -- Called DAHDI/1/812*
> *[Feb  4 10:36:10] WARNING[32752]: chan_dahdi.c:4185 dahdi_r2_write_log:
> Chan 1 - Seize Timeout Expired!*
> *[Feb  4 10:36:10] ERROR[32752]: chan_dahdi.c:4188 dahdi_r2_write_log:
> Chan 1 - Protocol error. Reason = Seize Timeout, R2 State = Seize
> Transmitted, MF state = MF Engine Off, MF Group = Forward MF init, CAS =
> 0x08*
> *DNIS = 812, ANI = 101, MF = 0x20*
> *[Feb  4 10:36:10] ERROR[32752]: chan_dahdi.c:3973
> dahdi_r2_on_protocol_error: MFC/R2 protocol error on chan 1: Seize Timeout*
> *    -- Hungup 'DAHDI/1-1'*
> *  == Everyone is busy/congested at this time (1:0/0/1)*
> *    -- Executing [812 at demo:2] NoOp("SIP/101-00000015", " DAN
> CHANUNAVAIL") in new stack*
> *    -- Executing [812 at demo:3] Hangup("SIP/101-00000015", "") in new stack*
> *  == Spawn extension (demo, 812, 3) exited non-zero on 'SIP/101-00000015'*
>
> Would you please tell me what can help me to solve the problem. Is there a
> problem with the signalling bits, configured in the multiplexer or the
> configuration in the Asterisk.
>

This error is typically a configuration problem on the other end. It means
we sent a CAS signal but did not receive any response (no bit changes on
the rx)
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