home *** CD-ROM | disk | FTP | other *** search
- Path: prodigy.com!usenet
- From: BNVA76A@prodigy.com (Larry Haynes)
- Newsgroups: comp.sys.cbm
- Subject: Re: Dip switches on 1670 modem?
- Date: 13 Mar 1996 00:39:38 GMT
- Organization: Prodigy Services Company 1-800-PRODIGY
- Distribution: world
- Message-ID: <4i55ga$gru@usenetw1.news.prodigy.com>
- References: <4i0grj$dte@nuhou.aloha.net>
- NNTP-Posting-Host: 198.83.16.34
- X-Newsreader: Version 1.2
-
- judd@aloha.net (GARY WAYNE JUSTICE) wrote:
- >
- >Could anybody tell me what the postions of the dip switches on the
- Commodore
- >1670(1200 baud) modem are set at?
- > I have seem to have lost the orginal manual to it,there are 4(four)
- >switches on the back of it.
-
- Excerpts from pages 62 and 70 of Commodore Modem 1200 Model 1670
- manual. Looking at the back, switches are 1-4 from left to right
-
- SWITCH FUNCTION SETTING
- 1 Auto Answer Enable
-
- Auto answer suppressed DOWN
-
- Modem answers on second ring UP
-
- Dip switch 1 control the auto answer mode.
- On power up, the modem checks dip switch 1,
- and if it is down, it will ignor all incom-
- ing calls (as if you had issued an ATSO=0
- command). With the switch up the modem will
- answer on the second ring.
-
- 2 Carrier Detect Enable
-
- Carrier detect on pin H-K of edge connector DOWN
-
- No carrier detect signal UP
-
- Only Plus/4 users need to be concerned with
- this switch. It must be in the UP position
- for successful transmission. Other computers
- can operate regardless of how this switch is
- set.
-
- DCD (User port pin H,K - from modem) is low
- when a carrier has been detected. This line
- can be disabled with dip switch 2 UP.
-
- 3 Speed Indicate Enable
-
- Enable the speed indicate signal to the DOWN
- computer to inform the program of the
- transmission speed of an incoming call.
-
- Disable the speed indicate signal. UP
-
- SI (User port pin J - from modem) is the
- speed indicate line. This tells the computer
- the speed of the incomming call. High is 300
- baud. Low is 1200 baud. Monitor this line to
- provid an autobaud function for BBS programs.
- This line is disabled with dip switch 3 UP.
-
- 4 Data Terminal Ready
-
- DTR always on. DOWN
-
- DTR normal; computer controls DTR. UP
-
- DTR (User port pin E - from computer) is
- normally grounded with dip switch 4. This
- signal can be controlled by the computer if
- switch 4 is UP. With switch 4 UP, the modem
- will disconnect current call and ignore all
- commands if DTR is high, and operate normally
- if DTR is low. BBS programs can use this to
- force a disconnection after a given time limit.
-
- NOTE: When you change a dip switch setting. The new setting is
- initiated when you plug in (first turn on) the modem. if the
- modem is already plugged in (turned on), initiate the new
- setting by issuing the Zap (AT Z) command.
-
- Hope this will be some help. If there is any more info that
- might be in the manual you need e-mail me at bnva76a@prodigy.com
- because I check that box more often than the Denver Freenet one.
-
- Larry L Haynes bnva76a@prodigy.com
- Denver, CO, USA bm851@freenet.hsc.colorado.edu
-
-
-
-