Black Box MD1276A, User Manual

Page: 226 / 289

Page 226
ATS42 Modem
Disconnect Reason
S Register 42 contains a value indicating the
reason the modem last disconnected.
This allows you to check for possible faults if
your modem suddenly hangs up or returns to
local command state without you entering an
escape sequence.
The modem will return one of the following
values in S Register 42:
Va l u e Mea ning
0 Modem reset
1 An escape sequence was entered
or DTR was lowered after the
&D1 command was issued
2 DTR lowered by the computer
after an &D2 or &D3
command was issued
3 Carrier lost from remote
modem
4 Disconnect using the TALK/
DATA switch
5 Connection failed or timed out
6 No answer tone detected
7 Connected at wrong speed
8 S Register 7 time limit exceeded
9 Receive data buffer (line buffer)
overflowed
1 0 Receive data buffer (terminal
buffer) overflowed
1 1 Failure to negotiate MNP class
3 or 4 connection
1 2 Inactivity timer expired
1 3 Unable to establish MNP
connection with reliable mode
selected
1 4 Retrain failed
1 5 A break sequence received from
the remote modem after the
Y1 command was issued
1 6 Character received while
modem was attempting to
establish a connection
17,18 Internal error
— MNP
1 9 NORMAL MNP or V.42
disconnect. Disconnect request
from remote modem
2 0 MNP disconnected after 12
attempts to send a packet
21-26 Internal protocol errors
—
MNP
2 7 Analog loopback switch
asserted while on line
2 8 Security system rejected user
2 9 DES encryption could not
achieve an error corrected
connection
3 0 MNP10 rate fallback failed
3 1 CTS stuck (continuous retrains
or data pump failure)
3 2 Incoming call: Access denied
3 3 LAPM protocol error
3 4 DES Multikey: Key and/or IV
did not match remote modem
3 5 Too many retrains, unable to
get a good connection
4 2 V.42bis received an invalid
token
6 0 Fax completed successfully
61, 62 Fax error caused disconnect
6 3 Remote fax busy
9 9 Abnormal exit from on line
state