[asterisk-users] Sporadic yellow alarms in dahdi_tool output

[Ishwar Sridharan]

Thanks for the response James. I shall talk with the provider.
If the problem resides with the remote side, how does
loading dahdi_echocan_mg2 and wct4xxp modules fix the issue, atleast
temporarily?

--
Regards,
Ishwar.


On Fri, Nov 25, 2011 at 8:04 PM, James zhu <zhulizhong at live.com> wrote:

>  hi:
> please ask your provider to check the connection. yes, RAI means there is
> a problem with remote side.
>
> Best regards,
> James.zhu
> Doing asterisk/PRI/ss7/dahdi, linux, asterisk cards,
> gateway(fxs/fxo/pri<->SIP).
> website: www.voipviews.com
>
>
> ------------------------------
> Date: Fri, 25 Nov 2011 18:48:33 +0530
> From: ishwar at exotel.in
> To: asterisk-users at lists.digium.com
> Subject: [asterisk-users] Sporadic yellow alarms in dahdi_tool output
>
>
> Hi all,
>
> We have a telephony server in India which runs CentOS release 5.7 (Final)
> version with four-span Digium Card, one of which has an E1 PRI line
> terminating on the server.
> $ dahdi_hardware
> pci:0000:07:08.0     wct4xxp+     d161:1420 Wildcard TE420 (5th Gen)
>
> Recently we've been observing the status of Span 1 as observed from
> dahdi_tool output flaps between yellow and green. This happens a couple of
> few a day.
> While the span state is yellow, I observed that the
> modules dahdi_echocan_mg2 and wct4xxp are not loaded.
>
> After running sudo modprobe wct4xxp; sudo modprobe dahdi_echocan_mg2, the
> span state changes to green.
> The dahdi documentation has the following to say on yellow alarms:
>
> (RAI — Remote Alarm Indication)
>
> Your T1/E1 port will go into yellow alarm when it receives a signal from
> the remote switch that the port on that remote switch is in red alarm. This
> essentially means that the remote switch is not able to maintain sync with
> you, or is not receiving your transmission.
>
>
> As a newbie to asterisk, pointers will be very helpful. Here are some more
> details on the installed versions of various packages/modules.
>
> 1. Linux Kernel Version : $ uname -a
> Linux 022.exotel.in 2.6.18-274.3.1.el5 #1 SMP Tue Sep 6 20:13:52 EDT 2011
> x86_64 x86_64 x86_64 GNU/Linux
> 2. Dahdi verison: dahdi-linux-complete-2.5.0.1+2.5.0.1
> 3. Asterisk verison: asterisk-1.8.6.0
> 4. libpri version: libpri-1.4.12
>
> Is this a configuration issue, package version issue or an operator issue?
> I'll be glad to share the necessary dahdi configuration files if needed.
>
> Thanks in advance.
>
> --
> Cheers,
> Ishwar.
>
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