root@ozdaltx.UUCP (root) (06/16/89)
I'm running into a strange problem since I've started using
a new modem. The message,
"garbage or loose cable on serial dev 8, port shut down"
Will appear on my screen, I think after the line has been
called... It never does it when I'm sitting here.
Someimtes, I will also see a "panic trap" message and the
system will go West and has to be reset.
I'm running SCO XENIX V2.1.1 on an AT 286. The modem is an
EVEREX 2400E. I have an ANCHOR 2400E on the other port and
it hasn't given me any trouble. (knock on wood).
I'm wondering if certain parameters in the modem need to be
changed. I have &C1 and &D0 set, with S0=2.
My gettydefs table look like this;
1 # B1200 SANE HUPCL ECHOE ISTRIP CS8 CR1 NL1 -CLOCAL #
B1200 SANE HUPCL CS8 ECHOE IXANY -CLOCAL #
\r\fMembership: use "guest"\n\rAIDS info: use "aids"\n\rLogin: # 2
2 # B300 SANE HUPCL ECHOE ISTRIP CS8 CR1 NL1 -CLOCAL #
B300 SANE HUPCL ECHOE IXANY CS8 -CLOCAL #
\r\fMembership: use "guest"\n\rAIDS info: use "aids"\n\rLogin: # 3
3 # B2400 SANE HUPCL ECHOE ISTRIP CS8 CR1 NL1 -CLOCAL #
B2400 SANE HUPCL CS8 ECHOE TAB3 IXANY -CLOCAL #
\r\nAT\n\fMembership: use "guest"\n\rAIDS info: use "aids"\n\rLogin: # 1
Any suggestions/help would be more than appreciated.
Scotty
AIDS INFORMATION EXCHANGE BBS (214) 247-2367/247-5609
"Education is the best weapon"
{ames,rutgers,texsun,smu}!killer!ozdaltx!sysop johngm@dhw68k.cts.com (John Miller) (06/22/89)
In article <5542@ozdaltx.UUCP>, root@ozdaltx.UUCP (root) writes: > I'm running into a strange problem since I've started using > a new modem. The message, > > "garbage or loose cable on serial dev 8, port shut down" > > Will appear on my screen, I think after the line has been > called... It never does it when I'm sitting here. I have a friend who has the same problem as above. His system is using Xenix 2.1.1 on an AT. It only happens when a user calls in. He can dial out on the line but trying to login is a nightmare. johngm@dhw68k
daveh@marob.masa.com (Dave Hammond) (06/23/89)
In article <24025@dhw68k.cts.com> johngm@dhw68k.cts.com (John Miller) writes: >In article <5542@ozdaltx.UUCP>, root@ozdaltx.UUCP (root) writes: >> I'm running into a strange problem since I've started using >> a new modem. The message, >> >> "garbage or loose cable on serial dev 8, port shut down" [...] This should be one of those `frequently-asked-questions' :-> The `garbage or ...' message is quite generic. It appears *anytime* that there is any problem with the RS-232 level signals on a COM line. Problems can stem from poor cable wiring, poor shielding, improper (or more often *intermittent*) CD, CTR, DSR or RING signal levels, etc. -- Dave Hammond daveh@marob.masa.com
maxim@subch.UUCP (Maxim Samo) (06/24/89)
In article <24025@dhw68k.cts.com> johngm@dhw68k.cts.com (John Miller) writes: >In article <5542@ozdaltx.UUCP>, root@ozdaltx.UUCP (root) writes: >> "garbage or loose cable on serial dev 8, port shut down" This happens if the Ring Indicator Cable ist connected to the Computer. Just disconnect Pin 22 from the modem and everything should be fine. Maxim -- Maxim Samo, P.O.Box, CH-4125 Riehen UUCP (EUROPE): maxim@subch.UUCP UUCP (USA): ..!uunet!acad!acadch!impch!subch!maxim
mgraham@cdp.UUCP (06/25/89)
I have the same problem (garbage or loose cable on serial dev n, port shut down). This happens when people dialin (modem/1200/2400). Does anyone know about this/know what I can/should do about it? - Mark Graham
russ@bbx.UUCP (Russ Kepler) (06/27/89)
In article <5542@ozdaltx.UUCP>, root@ozdaltx.UUCP (root) writes: > I'm running into a strange problem since I've started using > a new modem. The message, > > "garbage or loose cable on serial dev 8, port shut down" [...] OK, this one has been running around for a while and I haven't seen anyone else answer... If the message is appearing on serial post that are actually internal modems a fix exists from SCO: xnx128 Internal Modem Supplement The letter associated say that the update (replacement libio.a files) will fix the problem reported in the 'garbage or loose' message above. I've set this up for a few folks (one of them fairly desperate for the fix this last weekend) and it really does seem to fix the problem. If anyone needs it it should be loadable from sosco. If you can't get it send me email & I can probably make it available using uucp or something else... -- Russ Kepler - Basis International SNAILMAIL: 5901 Jefferson NE, Albuquerque, NM 87109 UUCP: {backboneishsite}!unmvax!bbx!russ PHONE: 505-345-5232
bote@csense.UUCP (John Boteler) (07/05/89)
From article <894@bbx.UUCP>, by russ@bbx.UUCP (Russ Kepler): > In article <5542@ozdaltx.UUCP>, root@ozdaltx.UUCP (root) writes: >> I'm running into a strange problem since I've started using >> a new modem. The message, >> >> "garbage or loose cable on serial dev 8, port shut down" [...] > > OK, this one has been running around for a while and I haven't > seen anyone else answer... > > If the message is appearing on serial post that are actually > internal modems a fix exists from SCO: If the modem is external, and it has a Hayes command set, it is possible that this message is being caused by echoing from the modem or result codes being generated by the modem. Solution: Turn the echo and result code reporting off for dial-in use. As 'getty' initializes the port, if the modem receives any characters, it will echo them back to the host, which then echoes back to the modem...infinitely. More commonly, result codes are generated by the modem in response to 'getty' initializing the modem; the result is the same. 'getty' can't believe that any modem would have the audacity to actually send data to it without 'carrier detect' asserted. It therefore assumes that with 'carrier detect' absent, there must be either electromagnetic interference on the serial line or a loose connection causing invalid data to be sent, and reports same. Note: Telebit Trailblazers are made for UNIX systems, and have incorporated a dual mode result code command for just this reason. Practical Peripherals modems allow two setup configurations to be stored internally for quick switching between dial-out and dial-in modes. There are others, also. -- Bote uunet!cyclops!csense!bote {mimsy,sundc}!{prometheus,hqda-ai}!media!cyclops!csense!bote