Larson Davis System 824, Technical Reference Manual

Page: 532 / 673

A-76 824 Reference Manual 9/29/09
the monitor number entered, and (2) is a flag: 1-
Alarm 2-Exceedance 4-Low Memory. More than
one of these can be set at a time, in which case x is
the sum of all set flags.
Computer sends:
824A0123:11111111
Step 5
The Model 824 awaits a response code, which
should be: “824A0123:11111111” (enter), where
(0123) is the Model 824’s serial number and
(11111111) is the Lock Combination (setting 28)
which is required whether or not the Model 824 is
currently locked. If the response is incorrect, the
announcement is resent. Four chances are given to
respond correctly. A “3 cr” sequence will cause
the Model 824 to hang up.
824 sends: “Ready”
Step 6
When a correct response is received, the Model
824 indicates it is ready to send data when
requested with “824:Ready”(enter).
Model 824 Answering Procedure
Modem sends: 2 Step 1 The modem informs the Model 824 that a
connection has been requested; that is, the phone
is ringing.
Step 2 The Model 824 answers the phone.
Modem sends: 824A0123:001:0 Step 3 The modem informs the Model 824 that a connec-
tion has been made. The Model 824 modifies its
baud rate to that of the connected modem. If the
connection is unsuccessful, the procedure is
retried in 4 min.
Modem sends: 10 (enter) Step 4 The Model 824 sends the following announce-
ment: “824:824A0123:001:0” (enter), where
(0123) is the Model 824’s serial number, (001) is
the monitor number entered, and (0) is a flag: 1-