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

[ABLE1 <somewhere@xxxxxxxxxxx>]

On 12/28/2021 6:00 PM, Bob La Londe wrote:
> 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.
>>
>> AKAÂ  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.
>
Hi Bob,  Not even gonna hint you are wrong!!  No way!!!!
But, what I will say is that if Bager2700 hasn't already Googled Pulse
Dialing AKA "Rotary Dial" the answer is as follows.

========================================================================
Within the Bell System the dial pulse period is nominally one-tenth of a
second long, permitting a rate of 10 pulses per second. Modern
telephones are now wired for push-button dialing (see below), but even
they can usually generate pulse signals when the push-button pad is
operated in conjunction with electronic timing circuits.
========================================================================

Have a good rest of the week!!!!

Les