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Conference hydra::amiga_v1

Title:AMIGA NOTES
Notice:Join us in the *NEW* conference - HYDRA::AMIGA_V2
Moderator:HYDRA::MOORE
Created:Sat Apr 26 1986
Last Modified:Wed Feb 05 1992
Last Successful Update:Fri Jun 06 1997
Number of topics:5378
Total number of notes:38326

932.0. "CTS2424 adh modem" by HOUSE::FRACTAL () Sat Nov 28 1987 21:39

    
    Hi... I just bought a CTS2424 adh modem for 299 to replace my Scholar.
    Does any body else out there have this beast? It has an incredible
    command set. Let me tell ya' you can do anything with this baby...but,
    here's a problem. I have a cable with pins 1-8 and 20 connected
    to my Amiga. For some reason, when I dial anywhere, it just says
    no carrier. Also, it drops carrier on the local analog loop mode
    along with loads of garbage. It did the same on my Decmate III.
    If anybody has this sucker, can you give me a hand? 
    
    (yes I know that you're all thinking what did he buy a cts when
    he had a scholar for? I've had a total of 4 shortouts on the part
    of the scholar. Must have been an early model :-)
    
    
    
    HELP!
    
T.RTitleUserPersonal
Name
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932.1Try this...OASIS2::BERNARDJohn Bernard DTN 288-6622Sun Nov 29 1987 15:3618

I had the same problem with one of my modems.  The Amiga can raise or lower
DTR (pin 20) at will depending on application/software through the 8520 chip.

A way around this would be, on your MODEM cable ONLY, connect pin 9 from the
SER: port to pin 20 of the modem.  This in effect gives you DTR all the time.

An easier way would be to force DTR from within the modem.  The manufacturer
usually provides this option on most modems.   You need DTR to set off and
maintain the initial connect handshake.


Hope this helps...  Let us know how you make out..

-john-


932.2ok..HOUSE::FRACTALMon Nov 30 1987 21:137
    
    Ill give it a shot. Does DTR determine whether or not you can pick
    up carrier?
    
    
    thanks,
    
932.3As I remember...OASIS2::BERNARDJohn Bernard DTN 288-6622Wed Dec 02 1987 14:216
Essentially, you need Terminal Ready (DTR) to be able to generate Carrier
 Detect (pin 8).  The modem uses this internally to establish and keep the 
connection as well as some software packages.

-john-