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- Feb 2/93 SupraFAXModem V.32(bis) HINTS & TIPS by Paul Elson
- updated Feb 15/93
- ---------------------------------------------------------------------------
- * DISCLAIMER *
- You may distribute this freely, without charge, so long as no portion of
- this document is modified. While nothing I describe or suggest in this
- document should be harmful to any part of your computer system or modem, I
- will NOT be responsible for ANY kind of damage, loss of income, your sanity
- or whatever it maybe!
-
- I am NOT an employee of SUPRA CORP.; nor have I received any money for
- this document. I am the average computer user just like you.
-
- If you wish to add something to this document, please fell free to do so
- at the END of it, and send me a copy. (see end of file where i can be
- reached). Please also include the date on which you do so.
- ---------------------------------------------------------------------------
-
- After a lot of messing around with my SUPRAFAXMODEM V.32bis, I finally
- came up with the best configuration that allowed me to connect just about
- everywhere at 14400bps. First off you should use the &F2 defaults, and
- change your profile from there. I've called as much as 3000 miles away and
- still able to connect at 14400!
-
- Here is my NRAM setting that I use everyday...
-
- ACTIVE PROFILE:
- B1 E1 L2 M0 N1 Q0 T V1 W2 X4 Y0 %C1 %E0 %G0 \N3 &C1 &D2 &K3 &Q9 &R0 &S0 &X0 &Y0
- S00:000 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:050 S08:002 S09:006
- S10:014 S11:050 S12:050 S18:000 S23:061 S25:005 S26:001 S36:007 S37:000 S38:020
- S40:087 S46:138 S48:007 S95:000 S109:062 S110:002
-
-
- Change W0 to W2, when you connect, you will get the MODEM speed connect
- XXXXX not the serial port rate.
- ***NOTE*** Make sure your serial ports is locked at 19200 (or higher),
- that HARDWARE FLOW IS ON (RTS/CTS),and that your terminals AUTO BAUD is
- OFF!!
-
-
- ---------
- UPSHIFING
- ---------
- S register 109 is a BIT MAP REGISTER. The default for S109 is 62, which is
- all rates combined (connect at 4800 and upshift through 14400). How do you
- get 62?? Add'em 4800-14400(see chart below). So if you want to connect at
- say 9600 and go to 12000 set s109=24 (9600=8, 12000=16, so 8+16=24). If you
- want to go from 9600 to 14400 set 109=40 (9600=8,14400=32, so 8+32=40).
- ***NOTE*** With that last example the modem will jump from 9600 to 14400
- if the line is good enough, IT WILL NOT GO TO 12000 FIRST!!! IT
- WILL JUMP STRAIGHT TO 14400!! I don't recommend doing this
- unless you know that your line is ok! Instead set s109=56
- (8+16+32), this time the modem will go from 9600 to 12000 and
- then to 14400 is the lines are ok.
- ***NOTE*** To enable upshifting set S110=3 and %G1. After you do this the
- modem will only connect at the slowest speed set in S109.(above
- examples 9600)
-
- S109 value rate
- ----- ----
- 1 reserved
- 2 4800
- 4 7200
- 8 9600
- 16 12000
- 32 14400
- 64 reserved
- 128 reserved
-
-
- ------------------
- Some Little Extras
- ------------------
- If you find that you are getting a lot of "RETRAINS" try changing the %G1
- to %G0, this turns off the "rate renegotiation." I have found that this
- helps on long dist. calls.
- ***NOTE*** If you have the new "H or J" roms %G1 must be set in order for
- the modem to UPSHIFT!!!
-
- I've heard of people having some problems connecting with old USR DUAL
- STANDARDS. By setting S9=3, it seems to fix the problem. I HAVE NEVER HAD
- TO DO THIS, SO I CAN'T CONFIRM IT.
-
- Tried to run the modem tests but they didn't work??? Try this...Set serial
- port to 9600 or 2400. Then issue this command AT&F, now you should be able
- to use the test modes.
-
- If you have a tone line, Try changing S11 to about 55 (any # between 50 and
- 60 should be ok). This will turn "speed dialling" on.
-
- Some info on S95.
- If S95= Modem Connect Code Example
- -------- ------------------ -------
- 2 Connect DTE/ARQ Connect 19200/ARQ
- 3 Connect DCE/ARQ Connect 14400/ARQ
- 32 Proto:Compr:Connect DTE Protocol: (ie.LAP-M)
- Compression: (ie.V.42bis)
- Connect 19200
- 33 Proto:Compr:Connect DCE Protocol: (ie.ALT)
- Compression:(ie.Class 5)
- Connect 14400
- 34 Same as 32 except /ARQ added to connect code
- 35 Same as 33 except /ARQ added to connect code
- 45 Carrier:proto: Carrier 14400
- Compr:Connect DCE Protocol:
- Compression:
- Connect 14400
- 46 Same as 45 except /ARQ added to connect code
- 48 Compression:Connect DCE Compression:
- Connect 14400
- 50 same as 48 except /ARQ added to connect code
-
-
- -----------------------
- Some info on line noise
- -----------------------
- Have you ever noticed your modem connected and you DON'T get a CONNECT
- XXXX on your screen?? (YES THIS IS CAUSED BY LINE NOISE!!!) Or You connect
- and screen fills up with baud barf?? Or you connect and suddenly the modem
- drops carrier?? And last you try to connect, but modem just keeps sending
- the connect tones over and over but never connects??
-
- Well if you have, then you are more than likely getting some kind of line
- noise. I'm not going to go into a big speech about this because there are
- lots of files on this subject. But what i can tell you is, first try a
- slower baud rate by LOCKING the modems rate (using the N command and S
- register 37) and see if that helps. Next try a noise filter, I know several
- people that had some of the problems I mentioned above and it cleared most
- of it up. Something else, if you think you have line noise call your phone
- company and have them check your lines. If you still can't connect to a
- selected few modems (mostly on the same # exchange), its probably, a
- switching station that your lines go through.
-
- I have a problem connecting to a friend, who lives no more then 40 miles
- from me. We can only connect at 4800 10% of the time. We both had our lines
- checked, and they were OK. So i did a some checking around and found that a
- switching station between our homes was the problem. My line is on a
- semi-old analog switch and my friends is on an OLD analog switch, but the
- lines between the switches are NEW LINES installed 2 years ago....heres a
- small diagram...
-
- My house Friends house
-
- /\ /\
- |__| |__|
- | --- NEW LINES --- |
- |---------| |----------------| |-----------|
- --- --- <--this one is OLD
- ^ ^
- | switching stations |
-
- He has no problems connecting to anybody and either do I. Weird 'eh!?!?
- The phone company has been replacing some of the analog switches with
- NEW digital switches. Hopefully when they replace the old one my friends
- on, we'll be able to connect at a higher speed.
-
- FEB 15/93 - Today I found out that our phone company is replace all the
- old switches in the PROVINCE to new digital ones by the end of '93!
-
- Well guess thats about it, if I come up with any more it will be put in
- here...Hope this helps!
-
- If you have any info for me or you add to this file please NETMAIL me at
- 1:255/9@FIDONET or 40:940/1@AMIGANET
-