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- From: dburr@sbphy.physics.ucsb.edu (Donald Burr)
- Newsgroups: comp.dcom.modems,comp.unix.ultrix
- Subject: Setting up a Zoom V.32 on DECstation 5000/200 using ULTRIX 4.2
- Message-ID: <dburr.713670592@sbphy.physics.ucsb.edu>
- Date: 13 Aug 92 01:49:52 GMT
- Sender: root@ucsbcsl.ucsb.edu
- Followup-To: comp.dcom.modems
- Lines: 59
-
- Well, the site where I work, Santa Barbara City College, just got a nice
- shiny new Zoom V.32 modem (Note this is NOT the V.32 Turbo; it does NOT
- do 12,000 BPS using V.32bis, just straight 9600/V.32) I am having an
- interesting time, however, hooking it up to our DECstation 5000/200
- running Ultrix.
-
- First of all, how do you set up a modem as a dial-in port? Right now
- what I am doing is doing ATS0=1, and turning off command echo (ATQ1,
- ATV0, I think) and letting the modem do the answering, and just running
- a "dumb" getty on that port. Is there a better way? Perhaps one that
- can send initialization strings to the modem, and wait for a "CONNECT
- xxx" message so it can do auto-bauding? if so, how can I do this, and
- where is the source code (if it is a program)
-
- Now, does the ULTRIX tty ports support Hardware Flow Control (HFC)?
- This would be a definite advantage, because a lot of our users do file
- transfering (both from them -> to the workstation, and to them <- from
- the workstation) and blasting data at 19.2k baud (we have our port
- locked at that speed) can tend to over-run modem and serial port
- buffers. If HFC is supported, how do I enable it? (is it a
- hardware-only fix, or is it involve both hardware and software)
-
- Now my real reason for posting to comp.dcom.modems: Our lines are on a
- main switchboard. Consequently, I believe they have a strange ringing
- pattern (two short rings, close together, rather than one long ring)
- However, I don't think the modem can recognize this. The reason why is
- that the modem does not answer! Well, it does not answer most of the
- time -- it just sits there for 5 or 6 rings, or even 8, before I finally
- give up in disgust and disconnect. On rare instances, however, I HAVE
- been able to connect -- sometimes after the first ring, or sometimes
- after 3-4 rings. This is, IMHO, a problem with either the Zoom modem
- specifically, or a problem with our phone line. I am thinking it is a
- problem with our phone line, because I have a Zoom V.32 Turbo here at
- home, and it is on a residential (i.e. single) line, and it recognizes a
- ring right away, and answers right away. also, we used to have an older
- modem (Practical Peripherals 2400 baud, dumb modem) running on this same
- phone line, and it answered right away as well.
-
- My thoughts are that either the double-ring is confusing the hell out of
- the modem, or the ring signal is not "strong enough", and the modem is
- not recognizing it unless it repeats several dozen times.
-
- My question: Is there any way to fix/remedy this? Like increasing the
- modem's sensitivity? Basically, anything short of getting a new phone
- line/number.
-
- Anyway, thanks so very much for all your help! The Net is indeed a
- useful resource.
-
- Please send replies via E-MAIL to dburr@sbphy.physics.ucsb.edu. I
- regrettably don't read these groups very much, and if you replied by
- posting, they would probably scroll off our local site before I had a
- chance to read them. :-(
-
- --
- : Donald Burr, Coordinator : dburr@sbphy.physics.ucsb.edu INTERNET :
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