[Freeswitch-dev] FreeTDM delay reconnecting E1/T1

Moises Silva moises.silva at gmail.com
Mon Oct 24 08:04:17 MSD 2011

On Thu, Oct 20, 2011 at 10:21 AM, Glaucio Vaz de Mello <gvmello at yx.cl>wrote:

> Hello,
> Just to tell you that I tested it again with latest Git source and latest
> sangoma driver.
> Delay still happens, but are less than before.
> When E1/T1 cable is disconnected, wanpipemon command shows "Loss of Signal"
> in less than 1 second.
> Meanwhile, fs_cli "ftdm dump" still shows "physical status" as "ok" for 4
> or 5 seconds, then it turns to "alarmed".
> Reconnecting the cable I experienced bigger delays: while wanpipemon shows
> "Loss of Signal OFF" in less than 1 second, fs_cli "ftdm dump" takes more
> than 20 seconds to became "ok" again.
> If you think this should be fixed and need more information, logs or ssh
> access, just let me know and I'll be glad to provide it.

The "loss of signal" indicator is a very low level indication that there is
sudden disconnection, but the T1/E1 standard has a timer to indicate red
alarm, 4 seconds sounds about right top off my head. However 20 seconds to
recover from red alarm is too much. Please contact techdesk at sangoma.com to
have a support engineer take a closer look at your problem.

Feel free to ping me on IRC as well.

*Moises Silva
**Software Engineer, Development Manager***

msilva at sangoma.com

Sangoma Technologies

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t.   +1 800 388 2475 (N. America)

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