[comp.dcom.modems] Can you change the pulse timing on T2500's?

jiro@shaman.com (Jiro Nakamura) (05/20/91)

Hiya -
	Quick question:

	Is it possible to change the speed of the pulse dialing on
Telebit T2500's?  I haven't counted, but it seems like it's about
15 pps, I'd like to move it up to 20 pps if possible.

	- jiro nakamura
	jiro@shaman.com

-- 
Jiro Nakamura				jiro@shaman.com
Shaman Consulting			(607) 253-0687 VOICE
"Bring your dead, dying shamans here!"	(607) 253-7809 FAX/Modem

chip@osh3.OSHA.GOV (Chip Yamasaki) (05/21/91)

In <1991May20.153657.654@shaman.com> jiro@shaman.com (Jiro Nakamura) writes:

>Hiya -
>	Quick question:

>	Is it possible to change the speed of the pulse dialing on
>Telebit T2500's?  I haven't counted, but it seems like it's about
>15 pps, I'd like to move it up to 20 pps if possible.

Check the manual, pp 4-32 and 5-38 both list S Register 11 which sets the
Touch tone timing.  There the manual says "The S11 register does NOT
affect pulse dialing which IS FIXED at 100 milliseconds per pulse."

No, you can't change it.
-- 
--
Charles "Chip" Yamasaki
chip@oshcomm.osha.gov

gandrews@netcom.COM (Greg Andrews) (05/21/91)

In article <1991May20.153657.654@shaman.com> jiro@shaman.com (Jiro Nakamura) writes:
>Hiya -
>	Quick question:
>
>	Is it possible to change the speed of the pulse dialing on
>Telebit T2500's?  I haven't counted, but it seems like it's about
>15 pps, I'd like to move it up to 20 pps if possible.
>

Sorry, the pulse dial timing on the TB+, T1000, T2000, T2500, etc. is fixed
at 100 milliseconds.  See the &Pn command and S11 registers for more info.
You can alter the Make/Break ratio, but the overall timing remains approx 
10 pulses per second.

>	jiro@shaman.com

-- 
 .------------------------------------------------------------------------.
 |  Greg Andrews   |       UUCP: {apple,amdahl,claris}!netcom!gandrews    |
 |                 |   Internet: gandrews@netcom.COM                      |
 `------------------------------------------------------------------------'

davidg%aegis.or.jp@kyoto-u.ac.jp (Dave McLane) (05/22/91)

chip@osh3.OSHA.GOV (Chip Yamasaki) writes:

> In <1991May20.153657.654@shaman.com> jiro@shaman.com (Jiro Nakamura) writes:
>
> >Hiya -
> >     Quick question:
>
> >     Is it possible to change the speed of the pulse dialing on
> >Telebit T2500's?  I haven't counted, but it seems like it's about
> >15 pps, I'd like to move it up to 20 pps if possible.
>
> Check the manual, pp 4-32 and 5-38 both list S Register 11 which sets the
> Touch tone timing.  There the manual says "The S11 register does NOT
> affect pulse dialing which IS FIXED at 100 milliseconds per pulse."

True enough, but my manual says, on pp 4-23 and 5-30:

  The &P command is used to select the make/break ratio used when
  pulse dialing.

  &P0 - 39% Make/61% Break ratio. US timing.
  &P1 - 33% Make/67% Break ratio. UK timing.

But maybe that isn't what you want....

--Dave

--
Dave McLane <davidg%aegis.or.jp@kyoto-u.ac.jp>

floyd@ims.alaska.edu (Floyd Davidson) (05/22/91)

In article <1991May21.044113.1688@osh3.OSHA.GOV> chip@osh3.OSHA.GOV (Chip Yamasaki) writes:
>In <1991May20.153657.654@shaman.com> jiro@shaman.com (Jiro Nakamura) writes:
>
>>Hiya -
>>	Quick question:
>
>>	Is it possible to change the speed of the pulse dialing on
>>Telebit T2500's?  I haven't counted, but it seems like it's about
>>15 pps, I'd like to move it up to 20 pps if possible.
>
>Check the manual, pp 4-32 and 5-38 both list S Register 11 which sets the
>Touch tone timing.  There the manual says "The S11 register does NOT
>affect pulse dialing which IS FIXED at 100 milliseconds per pulse."
>
>No, you can't change it.

Just to add a little to this...  Telephone switch systems are
also "fixed" at 10 pps, so changing it would most likely
cause errors  (8-12 pps would probably work, out of that range
and the switch will think it isn't dial pulse anymore).

Floyd
-- 
Floyd L. Davidson   | Alascom, Inc. pays me, |UA Fairbanks Institute of Marine
floyd@ims.alaska.edu| but not for opinions.  |Science suffers me as a guest.

curt@cynic.wimsey.bc.ca (Curt Sampson) (05/22/91)

In article <1991May22.014949.14165@ims.alaska.edu>
  floyd@ims.alaska.edu (Floyd Davidson) writes:

> Just to add a little to this...  Telephone switch systems are
> also "fixed" at 10 pps, so changing it would most likely
> cause errors  (8-12 pps would probably work, out of that range
> and the switch will think it isn't dial pulse anymore).

Actually, some exchanges will accept pulses at a 20 pps rate.  The
internal modem in the Radio Shack Model 100 laptop had an option to
dial at 20 pps.

cjs
-- 
Curt Sampson            | "[Atari's Race Drivin'] is more fun as a perverse
curt@cynic.uucp         | sort of flight simulator than a driving game."
curt@cynic.wimsey.bc.ca |           --Kevin Nomura (chow@netcom.com)

davidg%aegis.or.jp@kyoto-u.ac.jp (Dave McLane) (05/23/91)

floyd@ims.alaska.edu (Floyd Davidson) writes:

> >>    Is it possible to change the speed of the pulse dialing on
> >>Telebit T2500's?  I haven't counted, but it seems like it's about
> >>15 pps, I'd like to move it up to 20 pps if possible.
> >
> >Check the manual, pp 4-32 and 5-38 both list S Register 11 which sets the
> >Touch tone timing.  There the manual says "The S11 register does NOT
> >affect pulse dialing which IS FIXED at 100 milliseconds per pulse."
> >
> >No, you can't change it.
>
> Just to add a little to this...  Telephone switch systems are
> also "fixed" at 10 pps, so changing it would most likely
> cause errors  (8-12 pps would probably work, out of that range
> and the switch will think it isn't dial pulse anymore).

Ummm, hold on. Maybe they are fixed where you are but in Japan we have
*both* kinds: 10 pps and 20 pps. For me, the solution was to the spend
the extra money and get a tone line set S11=50 (the minumum) and fire
off the numbers to the telco instead of having to wait, breathlessly,
for the pps to click, click ... click out.

--Dave

--
Dave McLane <davidg%aegis.or.jp@kyoto-u.ac.jp>

terryk@encore.com (Terence M. Kelleher) (05/31/91)

In article <1991May22.014949.14165@ims.alaska.edu> floyd@ims.alaska.edu (Floyd Davidson) writes:

   Just to add a little to this...  Telephone switch systems are
   also "fixed" at 10 pps, so changing it would most likely
   cause errors  (8-12 pps would probably work, out of that range
   and the switch will think it isn't dial pulse anymore).

In reality, telephone systems are extremely tolerent of the pulse
timings.  On a Hayes compatible that I had the "pleasure" of being a
designer on, I expirimented with varying the times.  It was quite
reliable from about 2pps to around 100pps.  Of course, your line may
vary.

--
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                                 +----------------+
Terence Kelleher              +--+-------------+  |
Encore Computer Corp.         |  | E N C O R E |  |
terryk@encore.com             |  +-------------+--+
                              +----------------+

root@zswamp.uucp (Geoffrey Welsh) (06/01/91)

In a letter to All, Terence M. Kelleher (terryk@encore.com ) wrote:

 >In reality, telephone systems are extremely tolerent of the 
 >pulse
 >timings.  On a Hayes compatible that I had the "pleasure" of 
 >being a
 >designer on, I expirimented with varying the times.  It was 
 >quite
 >reliable from about 2pps to around 100pps.  Of course, your 
 >line may vary.

   Yeah; I doubt that a Strowger could handle 100 pps, though I would suspect 
that the electronic exchanges (and electronically controlled crossbars) 
would.
 

--  
Geoffrey Welsh - Operator, Izot's Swamp BBS (FidoNet 1:221/171)
root@zswamp.uucp or ..uunet!watmath!xenitec!zswamp!root
602-66 Mooregate Crescent, Kitchener, ON, N2M 5E6 Canada (519)741-9553
"He who claims to know everything can't possibly know much" -me

kgustilo@pennsy.med.jhu.edu (06/24/91)

In article <FB6e35w164w@aegis.or.jp> davidg%aegis.or.jp@kyoto-u.ac.jp (Dave >>
Just to add a little to this...  Telephone switch systems are
>> also "fixed" at 10 pps, so changing it would most likely
>> cause errors  (8-12 pps would probably work, out of that range
>> and the switch will think it isn't dial pulse anymore).
>
>Ummm, hold on. Maybe they are fixed where you are but in Japan we have
>*both* kinds: 10 pps and 20 pps. For me, the solution was to the spend
>the extra money and get a tone line set S11=50 (the minumum) and fire
>off the numbers to the telco instead of having to wait, breathlessly,
>for the pps to click, click ... click out.
>
s7=25; s11=50 for Hayes modems will give you faster dialing speeds. I don't
know if this will work on Telebits though

bill@bilver.uucp (Bill Vermillion) (06/26/91)

In article <1991Jun23.174452.23558@aplcen.apl.jhu.edu> kgustilo@pennsy.med.jhu.edu writes:


>s7=25; s11=50 for Hayes modems will give you faster dialing speeds. I don't
>know if this will work on Telebits though

The question was in regards to pulse timing.  T2500 specifies that pulse
timing is fixed at 100 milliseconds.  (This is in the pgh that shows how to
change tone duration length)

-- 
Bill Vermillion - UUCP: ...!tarpit!bilver!bill
                      : bill@bilver.UUCP