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



On Tuesday, December 28, 2021 at 6:30:04 PM UTC-8, ABLE1 wrote:
> On 12/28/2021 6:00 PM, Bob La Londe wrote:=20
> > On 12/28/2021 2:25 PM, Bager2700 wrote:=20
> >> Hey I know 4/2 protocol is older than the days, however I am looking=
=20
> >> for the specs for the timing of the protocol.=20
> >>=20
> >> AKA  from Dialer going on line to waiting for station receiver online=
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> >> panel data tone bursts --- ACK -- kissoff etc.=20
> >>=20
> >> Although the timing is fairly flexible  i would like to know the=20
> >> actual specs for the sequence and timing.=20
> >>=20
> >> I have the SIA, Contact ID, FSK, etc but 4/2 formats i have not found=
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> >> information.=20
> >> Does anyone have the info?=20
> >> Thanks inadvance=20
> >>=20
> >>=20
> >=20
> >=20
> > Best guess?  Whatever the acceptable timing is between digits for pulse=
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> > telephone dialing.  Really.  That's where it comes from.  Its also why=
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> > pulse format is so slow compared it CID or other single tone/digit form=
ats.=20
> >
> Hi Bob, Not even gonna hint you are wrong!! No way!!!!=20
> But, what I will say is that if Bager2700 hasn't already Googled Pulse=20
> Dialing AKA "Rotary Dial" the answer is as follows.=20
>=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=20
> Within the Bell System the dial pulse period is nominally one-tenth of a=
=20
> second long, permitting a rate of 10 pulses per second. Modern=20
> telephones are now wired for push-button dialing (see below), but even=20
> they can usually generate pulse signals when the push-button pad is=20
> operated in conjunction with electronic timing circuits.=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=20
>=20
> Have a good rest of the week!!!!=20
>=20
> Les
Hey guys it not, the pulse dialing (make/break ratio) specs that I am looki=
ng for but the 4/2 protocol ... so communicator goes on line and completes =
it dialing via DTMF or Pulse. Then waits for the Central station RX to come=
 online with its format tones.  How long will the 4/2 wait for this, how ma=
ny milliseconds are the data bursts and timing of the data.

so ONLINE-<wait how long?> <CS, tones approx 750ms><communicator data burst=
s time?>< no pulse time?><next data> then finally <kissoff approx 750ms>  <=
communications completed.>
The mystery is what the actual specification are for the 4/2 data format?

Hope that all make sense?


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