[asterisk-dev] [DAHDI] How to set FXO channel busy

[dpn at switchvoice.com]

Hi Tzafrir,

-----Original Message----- 
From: Tzafrir Cohen
Sent: Tuesday, January 31, 2017 20:36
To: dpn at switchvoice.com
Subject: Re: [asterisk-dev] [DAHDI] How to set FXO channel busy

On Tue, Jan 31, 2017 at 06:52:18PM +0200, dpn at switchvoice.com wrote:
> Hello,
> I have developed a FXO driver which is working fine.

Where can we find it?

The driver I am developing supports both FXS and FXO.
Initially I have done FXS portion, it was improved by  Vittorio Gambaletta
and you can find it as OpenWRT package at 
https://github.com/villagetelco/vt-fxs-packages.
After I finalize FXO portion I will push it as well.

> I want to test the nontrivial scenario when I have an analog phone in 
> parallel to the FXO port.
> This setup works as expected.
> What I want in addition is the FXO port detects if the analog phone is 
> off-hook (has already seized the line).
> I can detect this by measuring the voltage on the line.
> So anyone familiar with DAHDI.
> What king of signal my driver should send to DAHDI so it puts the FXO 
> channel busy? (to avoid FXO tiring to seize the line if it is already used 
> by the analog phone)
> What signal I need to release the channel afterwards?

I don't remember if this is handled by DAHDI well.

Thank you.
Anybody else having a clue?


Thanks
Dimitar


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               Tzafrir Cohen
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