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- From: ray@nmt.edu (Ray Piworunas)
- Subject: Using a high-speed modem on an ASM terminal server.
- Message-ID: <1992Sep2.203948.25107@nmt.edu>
- Organization: New Mexico Institute of Mining and Technology (NM Tech).
- Date: Wed, 2 Sep 1992 20:39:48 GMT
- Lines: 74
-
-
- I have an ASM-32 that I am trying to get a "FaxModem" made by ZOOM
- Telephonics, Inc. to work on. I can't seem to establish a connection
- above 9600-baud. I would appreciate any help readers of this group
- could give. I'm not trying to do FAX transfers, just ordinary data
- connections.
-
- The serial line of the ASM the modem is on is setup as follows.
- #
- # Fast modem.
- #
- line 40
- access-class 1 out
- no private
- exec-timeout 2
- session-timeout 45
- modem ri-is-cd
- flowcontrol hardware
- autobaud
- databits 8
- parity none
- stopbits 1
- length 24
- width 80
- terminal-type dialup
- location TCC 2B - 14400-baud (MNP) dialup.
-
-
- I have wired the serial connection as shown below.
- ASM-32 Modem
- ---------------------
- SG (7) SG (7)
- TD (2) RD (2)
- RD (3) TD (3)
- RI (22) CD (8)
- DTR (20) DTR (20)
- CTS (5) CTS (5)
-
- The modem has the following settings (other than the factory defaults):
- &C1 Have CD follow condition of modem carrier.
- &D3 Reset modem after DTR drops.
- S0=1 Set for auto-answer.
- S36=5 Attempt an MNP connection, if it fails attempt an asynchronous
- (direct mode -- don't buffer data) connection.
- These settings were saved as configuration zero.
-
- I have been able to establish connections to the ASM at:
- 2400-baud, using a 2400-baud modem (Practical Peripherals PM2400SA),
- 4800-baud, using a Prometheus ProModem 9600-EC,
- 9600-baud, using a Prometheus ProModem 9600-EC.
- Once at the ASM prompt things work as they should.
-
- I can't establish a connection to the ASM at 19200-baud, nor at
- 38400-baud. From looking at the ASM port (using sh li 40) at various
- times during the connection attempt it appears the ASM is in its
- autobauding mode. It can't seem to lock on to the right speed.
- Occasionally it will show that the line has received a BREAK.
-
- I have tried setting the ASM line to a speed of 38400 instead of
- autobauding but that didn't help any with the attempt to connect at
- 38400. (I didn't try a slower speed connection with the ASM port at
- 38400 since the 38400 connection didn't work).
-
- I'm not sure if the error correction, or compression, at the higher
- speeds might be messing things up since I've never worked with these
- features before. It seems that that shouldn't be a problem in just
- getting to the terminal server prompt though.
-
- Well that's as far as I've gotten with it. I'm pretty well stuck right
- now. If you need more information please ask (I know I do!).
-
- Thank you,
- Ray Piworunas (ray@nmt.edu).
-
-