19 Nov
2017
19 Nov
'17
6:59 p.m.
I recently acquired a TI Silent 700 model 787 terminal. This cc 1980
unit is an interesting member of the Silent 700 family as it is capable
of 120 chars/sec printing and has an internal 300/1200 baud direct connect
modem that does Bell 103, Bell 212A and Vadic modulation in both originate
and answer modes.
It's a got a DB25 on the back for directly connecting serial but I don't
have any documentation on how to choose the internal modem vs the DB25
for comms or any pinouts for this DB25 outside the usual expectations
of RS232 on a DB25.
Seeking any documentation that might be around. Happy to cover copying
costs or purchase a manual if it is excess to someone's needs.
Chris
--
Chris Elmquist
19 Nov
19 Nov
8:46 p.m.
On Sun, 19 Nov 2017, Chris Elmquist via cctalk wrote:
I recently acquired a TI Silent 700 model 787
terminal. This cc 1980
unit is an interesting member of the Silent 700 family as it is capable
of 120 chars/sec printing and has an internal 300/1200 baud direct connect
modem that does Bell 103, Bell 212A and Vadic modulation in both originate
and answer modes.
It's a got a DB25 on the back for directly connecting serial but I don't
have any documentation on how to choose the internal modem vs the DB25
for comms or any pinouts for this DB25 outside the usual expectations
of RS232 on a DB25.
Some models of Silent 700 had a connector (I seem to remember it as maybe
being DA-15?, instead of DB-25?) that permitted it to connect to external
modem, AND permitted external devices to connect to the Silent 700
internal modem, or a loop back (defaulted to jumpered to that internally)
ofconnecting the terminal to its modem.
10:18 p.m.
On Sunday (11/19/2017 at 05:46PM -0800), Fred Cisin via cctalk wrote:
On Sun, 19 Nov 2017, Chris Elmquist via cctalk wrote:
Yes indeed. I have several of those, model 745 as one example, and it
is a DA15 for which I have the pinout and made a cable for hooking to
various old micros here.
This 787 is a later generation with some noticable differences in the
connectoring, switches, LEDs, etc. It is for sure a DB25 female and
below that, behind a flip-up cover, is an RJ11/13 (six pin) telephone
jack for the modem.
The unit is also taller/thicker than the 745 generation. It's roughly
another inch thick with the extra bulk on the bottom. At first I thought
it might be a model with bubble memory but it is not. Instead, it's the
"go faster" model with 120cps rather than 30cps printing.
There is a flip-card instruction manual inside the paper door which does
reveal some keyboard commands to change the baud rate (up to 9600 bps)
and the modem modulation and answer vs originate but there are no clues
about how to select modem or serial port or other more hardware specific
things.
Will be on the hunt for a service manual now. I have such for both my
1st (model 725) and 2nd (model 745) generation units so might as well
get one for this beast too.
Chris
--
Chris Elmquist
I recently acquired a TI Silent 700 model 787
terminal. This cc 1980
unit is an interesting member of the Silent 700 family as it is capable
of 120 chars/sec printing and has an internal 300/1200 baud direct connect
modem that does Bell 103, Bell 212A and Vadic modulation in both originate
and answer modes.
It's a got a DB25 on the back for directly connecting serial but I don't
have any documentation on how to choose the internal modem vs the DB25
for comms or any pinouts for this DB25 outside the usual expectations
of RS232 on a DB25.
Some models of Silent 700 had a connector (I seem to remember it as maybe
being DA-15?, instead of DB-25?) that permitted it to connect to external
modem, AND permitted external devices to connect to the Silent 700 internal
modem, or a loop back (defaulted to jumpered to that internally)
ofconnecting the terminal to its modem. 
20 Nov
20 Nov
10:40 a.m.
On Sun, Nov 19, 2017 at 9:18 PM, Chris Elmquist via cctalk
<cctalk at classiccmp.org> wrote:
Yes indeed. I have several of those, model 745 as one
example, and it
is a DA15 for which I have the pinout and made a cable for hooking to
various old micros here.
Is that posted/can you post that cable pinout somewhere? I've got a
number of those models and have never been able to attach anything to
those ports.
3:42 p.m.
On Monday (11/20/2017 at 09:40AM -0600), Jason T via cctalk wrote:
On Sun, Nov 19, 2017 at 9:18 PM, Chris Elmquist via
cctalk
<cctalk at classiccmp.org> wrote:
Hey Jason--
It's here, (Thank You Al)
http://www.bitsavers.org/pdf/ti/terminal/silent_700/984025-9701rC_743_KSR_7…
page 2-3, table 2-1 (pdf page 13).
I think the terminal is normally supplied with a "loopback" plug
(that's almost always missing) that goes into that DA15-M and loops the
"printer/keyboard interface" to the "communications interface" when
you
are using the onboard acoustic coupler. If you want to talk to a local
host not over the modem, then you remove that loopback plug and plug in
your own cable that goes to your host.
I made this cable with DA-15 female on one end and DE9-male on the other
so that this terminal would look like a PC serial port and connect to
various DCEs such as a terminal server and other stuff I have here wired
for direct connect to a PC comm port,
DA15-F DE9-M
1 5 GND
11 1 CD
12 2 RXD (to the terminal)
13 3 TXD (from the terminal)
15 4 DTR
Keep on the lookout for a model 787 manual. This thing is cleaning up
quite nicely and I hope to put the juice to it later today or tomorrow.
It was found on the floor of a garage-- that would be the dirt floor.
Not cool and it looked pretty rough on the outside but hoping it's still
happy on the inside ;-)
Chris
--
Chris Elmquist
Yes indeed. I have several of those, model 745
as one example, and it
is a DA15 for which I have the pinout and made a cable for hooking to
various old micros here.
Is that posted/can you post that cable pinout somewhere? I've got a
number of those models and have never been able to attach anything to
those ports.
2789
days inactive
2790
days old
4 comments
3 participants
participants (3)
-
chrise＠pobox.com -
cisin＠xenosoft.com -
silent700＠gmail.com