[Asterisk-biz] Modem Over IP: solutions ?

[Bruce Ferrell]

depending on the alarm datalink speed, you should be able to use G711 on 
just about any ATA or IAD type device. PSK modulations will be more 
suseptable to jitter.  Usually alarm circuits are FSK under 1200 BPS so 
they should make it fine.

Jean-Michel Hiver wrote:
> Hi,
> 
> I have a potential client who has legacy alarm systems which use modems 
> to transmit encoded data to a remote location through the PSTN. They 
> wish to replace the 'PSTN' bit with an IP link.
> 
> I am aware that it would be best if the data was transmitted directly 
> over IP rather than modulated and then sent on the internet, but that is 
> not possible because of the legacy equipment.
> 
> I was wondering if there was some specialized ATAs of some kind that 
> would do TDMoIP and which could be used for this purpose?
> 
> Link latency is about 300ms with no more than 10ms jitter. If you have a 
> solution please let me know!
> 
> Cheers,
> Jean-Michel.
> 
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