6 Sep
1998
6 Sep
'98
6:22 p.m.
Paul Grammens wrote:
I picked up a TRS-80 Model 100 Portable Computer for my collection, and
found a fair amount of info on it on the net. One thing I could use is a
pinout on the phone jack. Also, I gather that this went to an accoustic
coupler. Can I wire it so I can use it directly with a modular phone line?
I got this working with an external 1200 Baud modem, but I wanted to use
the internal 300 baud modem instead.
Thanks,
Paul
Hi Paul,
Here is the pinout for the phone jack:
Pin No. Symbol Description
--------- -------- ------------------------------------
1 TL Conventional Telephone Unit
2 GND Logic GND
3 R x MD Direct Connection to Tel Line (RING)
4 R x MC Acoustic Coupler Connection (MIC)
5 T x MC Acousitc Coupler Connection (Speaker)
6 VDD
7 T x MD Direct Connection to Tel Line (TIP)
8 RP Ringing Paluse
I hope this helps.
--Alan