Applicable Modems; Special Internal Relays For Modem Mode - IDEC FC4A-C10R2 User Manual

27: M M
ODEM ODE

Applicable Modems

Any Hayes compatible modem can be used. Modems with a communications rate of 9600 bps or more between modems
are recommended. Use modems of the same make and model at both ends of the communication line.

Special Internal Relays for Modem Mode

Special internal relays M8050-M8077 are allocated to the modem mode. M8050-M8056 are used to send an AT command
or disconnect the telephone line. M8060-M8066 and M8070-M8076 turn on to indicate the results of the command.
M8057, M8067, and M8077 are used to indicate the status of the modem mode.
All completion and failure internal relays are turned off when another start internal relay is turned on.
Start and Result Internal Relays
Mode
Originate Mode
Disconnect Mode
AT General Command Mode
Answer Mode
When one of start internal relays M8050-M8056 is turned on, a corresponding command is executed once. To repeat the
command, reset the start internal relay and turn the internal relay on again.
Completion or failure of a command is determined as described below:
Completion: The command is transmitted repeatedly as many as the retry cycles specified in data register D8109.
When the command is completed successfully, the completion IR is turned on and the command is not
executed for the remaining cycles.
Failure: The command is transmitted repeatedly but failed in all trials as many as the retry cycles specified in
data register D8109.
Status Internal Relays
Status IR
M8057 AT Command Execution
M8067 Operational State
M8077 Line Connection
Note: While M8077 (line connection) is off, the
communication through port 2. When M8077 is turned on, maintenance communication or user communication is enabled
depending on the value stored in data register D8103 (on-line mode protocol selection).
27-2
Command
Initialization String
ATZ
Dialing
Disconnect Line
AT Command
Initialization String
ATZ
Status
ON: AT command is in execution (start IR is on)
OFF: AT command is not in execution (completion or failure IR is on)
ON: Command mode
OFF: On-line mode
ON: Telephone line connected (Note)
OFF: Telephone line disconnected
MicroSmart
« FC4A M
Start IR Completion IR
M8050 M8060
M8051 M8061
M8052 M8062
M8053 M8063
M8054 M8064
M8055 M8065
M8056 M8066
Description
cannot send and receive maintenance communication and user
S U ' M
ICRO MART SER S ANUAL
Failure IR
M8070
M8071
M8072
M8073
M8074
M8075
M8076
»
Data Register
D8145-D8169
—
D8170-D8199
—
D8130-D8144
D8145-D8169
—