23
24
6. ERROR
response to AT[
command
7. Unit appears to
be locked-up
Unit is in PassThru
Mode
Flow control
parameters set
incorrectly
Improper sub-channel
cable pinout
Model 3022 not
plugged into an RS-
232 port, or is plugged
into a DB-25 port that
cannot supply
sufficient operating
power (short haul
modem, laptop, etc.)
(continued)
Key \\\ to re-enter Local
Offline Command
Mode
Disconnect Model
3022, then set
Terminal Device Flow
Control (RTS/CTS or
XON/XOFF).
Reconnect Model
3022, then set Model
3022 flow control (Fn
Command) to be the
same Flow Control
Method as Terminal
Device.
Re-wire cable
according to pinout
diagrams in Section
3.2.
It needs power! Plug it
into an RS-232 port or
obtain Model 3P-MF
power supply adapter.
SYMPTOM
POSSIBLE PROBLEM
SOLUTION
8. Modem
connection has
been established,
but 3022 will not
pass data
Model 3022 is still in
PassThru Mode
Improper bit rate at
modem channel (C3)
Flow control
parameters set
incorrectly
Data format (data bits,
parity, stop bits) set
incorrectly
(continued)
Reset Kill Time Out
(Kn command) to be
shorter time period.
Reset 3022 to enter
Online Data Mode
based upon status of
CD (AT[X1 command)
Break the modem
connection and check
the channel 3
configurations on both
local and remote
Model 3022s (AT[V).
Then reset C3 for
proper throughput rate
(AT[C3Bn).
Verify proper flow
control on all three
channels of local and
remote 3022
Verify correct data
format on all three
channels of local and
remote 3022
SYMPTOM
POSSIBLE PROBLEM
SOLUTION
