Data/Fax/Voice Modem User Guide MT5600DSVD, MT5600DSDV2

MultiModemDSVD User Guide 5 Solving Problems
59
Multi-Tech Systems, Inc.
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If you are running under Windows 3.1 and have a 16550AFN UART, you might
need to turn on the 16550’s data buffers and/or replace the Windows serial driv-
er, COMM.DRV.
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✔ Try entering the &V1 command to display information about the last connection,
making a screen print of the connection statistics, and checking for parameters
that might be unacceptable.
TT
TT
T
herher
herher
her
e e
e e
e
ArAr
ArAr
Ar
e Ge G
e Ge G
e G
arbagarbag
arbagarbag
arbag
e Ce C
e Ce C
e C
harhar
harhar
har
aa
aa
a
cters octers o
cters octers o
cters o
n tn t
n tn t
n t
he Mohe Mo
he Mohe Mo
he Mo
nitonito
nitonito
nito
rr
rr
r
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✔ Your computer and the remote computer might be set to different word lengths,
stop bits, or parities. If you have connected at 8-N-1, try changing to 7-E-1, or
vice-versa, using your communications software.
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✔ You might be experiencing line noise. Enable error correction, if it is disabled, or
hang up and call again; you might get a better connection the second time.
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✔ At speeds above 2400 bps, the remote modem might not use the same transmis-
sion or error correction standards as your modem. Try connecting at a slower
speed or disabling error correction. (With no error correction, however, line noise
can cause garbage characters.)
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✔ Try entering the &V1 command to display information about the last connection,
making a screen print of the connection statistics, and checking for parameters
that might be unacceptable.
TT
TT
T
he Modhe Mod
he Modhe Mod
he Mod
em Dem D
em Dem D
em D
oesnoesn
oesnoesn
oesn
’’
’’
’
tt
tt
t
WW
WW
W
oo
oo
o
rkrk
rkrk
rk
ww
ww
w
itit
itit
it
h Calh Cal
h Calh Cal
h Cal
lerler
lerler
ler
ID ID
ID ID
ID
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✔ Caller ID information is transmitted between the first and second rings, so if
autoanswer is turned off (S0=0) or if the modem is set to answer after only one
ring (S0=1), the modem will not receive Caller ID information. Check your ini-
tialization string, and if necessary change it to set the modem to answer after the
second ring (S0=2).
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✔ Make sure that you have Caller ID service from your telephone company.
FF
FF
F
axax
axax
ax
and D and D
and D and D
and D
aa
aa
a
tt
tt
t
a Sofa Sof
a Sofa Sof
a Sof
tt
tt
t
ww
ww
w
arar
arar
ar
e Cane Can
e Cane Can
e Can
’’
’’
’
tt
tt
t
Run a Run a
Run a Run a
Run a
tt
tt
t
t t
t t
t
he She S
he She S
he S
ameame
ameame
ame
TT
TT
T
imeime
imeime
ime
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✔ Communications devices can be accessed by only one application at a time. Un-
der DOS or Windows 3.1x, you can run either your fax software or your
datacomm software, but not both at the same time, unless you have a special
communications device management application. In Windows 95, you can have
data and fax communication applications open at the same time, but they cannot
use the same modem at the same time.