RE: Commodore Modems - C1660 and C1670

From: William Levak (wlevak_at_cyberspace.org)
Date: 2004-02-08 23:29:48

 

First:  The model number is not enough to identify the modems.  There
are several versions.  You also need the part number.

  model    part no.      modem
  1660     310476-01     Magic Modem TI-1660
  1660     310476-06     Magic Modem 1660
  1670     310476-02     U.S. Robotics
  1670     310476-04     Commodore CR-1670

If you have something different, I would like to add the information to my
list.

>Ok, so no melt downs... but I did have some problems... I had both a
>C1660 and a C1670 to try. The C1660 did most of the right things. I was
>using the "Common Sense" software (which by the way makes no sense to
>me... boy, telecommunications was horrible back then....) and it worked
>fine with respect to dialling out, waiting etc... but I had no real BBS
>number to actually connect to.

If you have a friend nearby with a computer and modem, you can have
him/her set the modem to answer, and dial the number.  With any simple
terminal program you should be able to communicate.

>Then I tried the C1670.... even with the latest version (which is meant
>to be 1670 compatible) it refused to give me the dial option. 

Just type in ATDT followed by the phone number, and press enter.  It
should dial.  This assumes touch-tone dialing, if not, use ATDP.

>                                                               So I tried
>some other software, FAST-TERM which were supposed to be 1670 compatible.
>These worked as far as waiting for the dial tone, then dialing the
>number, but rather than waiting for an answer they immediately show
>"CONNECT" without. I mucked around with the jumpers (3 jumper model) but
>no change... 
 
>I'm guessing the US version of the C1670 modem cannot detect the
>Australian "ringing tone", either wrong frequency or to soft... does
>anyone know? I did have to re-solder a connector to the board, but as
>dialling works I figure everything is properly soldered?
 
Not necessarily,  you can blow the Carrier Detect gate without affecting
anything else.

Warning: on the 1660 used on a Plus/4, you must open the jumper on the
bottom near the connector, or you definitely will blow the Carrier Detect
gate.


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