Re: 4/2 4/1 Timing Protocol Spefications wanted (Alarm protocols)

[Bob La Londe <none@none.com99>]

On 12/28/2021 2:25 PM, Bager2700 wrote:
> Hey I know 4/2 protocol is older than the days, however I am looking for the specs for the timing of the protocol.
>
> AKA  from Dialer going on line to waiting for station receiver online panel data tone bursts --- ACK -- kissoff etc.
>
> Although the timing is fairly flexible  i would like to know the actual specs for the sequence and timing.
>
> I have the SIA, Contact ID, FSK, etc but 4/2 formats i have not found information.
> Does anyone have the info?
> Thanks inadvance
>
>


Best guess?  Whatever the acceptable timing is between digits for pulse
telephone dialing.  Really.  That's where it comes from.  Its also why
pulse format is so slow compared it CID or other single tone/digit
formats.

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