[VoIP] Line reversals for payphones.....

[Andy Greening]

Hmmm,

More prodding and it would seem that the SPA 3000 can to line reversals,  on
the FXs although I can't seem to find how that would be programmed for
answer. Has anyone played with this feature and had it working?

Andy G

(I'm scared of using cisco stuff, it looks far to techy for me! )

-----Original Message-----
From: voip-bounces at ckts.info [mailto:voip-bounces at ckts.info] On Behalf Of
Shane Young
Sent: 05 November 2007 21:05
To: voip at ckts.info
Subject: Re: [VoIP] Line reversals for payphones.....

Detecting would be on the SPA-3000's FXO port, you need to look at the  
FXS port and I thought it could do reversal.

The Cisco 3810 should as well.

The IAXy from Digium doesn't, but I've asked Mark to add it, we'll see  
what happens :)

--Shane


Quoting Andy Greening <axg at syntec.co.uk>:

> Dennis
>
> Having just found a Sipura doc on the wed it states that it can detect
> reversal for a cleardown, but doesn't speicify that it can give a reversal
> on answer.....
>
> Andy
>
> -----Original Message-----
> From: voip-bounces at ckts.info [mailto:voip-bounces at ckts.info] On Behalf Of
> Dennis D Hock
> Sent: 05 November 2007 20:56
> To: Voice Over IP Tandem for Analog Switches
> Cc: Voice Over IP Tandem for Analog Switches
> Subject: Re: [VoIP] Line reversals for payphones.....
>
> Andy,
>
> Are you sure the Sipura doesn't reverse on answer as an option.  It seems
> to me I recall the couple I have being able to option it.  Don't know for
> sure if it really does it or not.
>
> Dennis Hock
>
> -----voip-bounces at ckts.info wrote: -----
>
>
> To: Voice Over IP Tandem for Analog Switches <voip at ckts.info>
> From: Andy Greening <axg at syntec.co.uk>
> Sent by: voip-bounces at ckts.info
> Date: 11/05/2007 03:49PM
> Subject: [VoIP] Line reversals for payphones.....
>
> Gents,
>
> Here's a little challenge to someone who knows far more about * than I do
> ;-}
>
> I have a UAX12 here in Blighty (ok it's off the air at the minute, it's
> just
> moved location at home and I've got to find time to cable it again!) and I
> have a Pay-on-answer payphone which I want to be able to use on Cnet. The
> problem I have is this:-
>
> For the payphone to work correctly the junction to the * needs to have its
> polarity reversed when the far end answers, and at certain periods
> throughout the call 'silent line reversals' would be applied to the
> junction
> to give the metering.
>
> I use a Grandstream handytone ATA as my outgoing junction, and AFAIAA no
> ATA
> offers line reversal on answer.
>
> The only way I can see that the line reversals can be done is to have a
> relay card in the * box and when the answer comes from Cnet have some sort
> of code make a relay on the card change over. The silent line reversals
> would be a bonus, (so that the metering comes from the junction) but is
not
> critical, as these can be 'spoofed' locally.
>
> Does anyone out there have the skills to give this a go?
>
> Thanks in advance
>
> Andy G
>
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> 04:36
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>

--Shane
+1-821-7311 CNET

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