User guide
13
DLM4000 User Guide
PN 161-09997-003A
Feb 2005
DLM4000 Command Descriptions
AT: The attention command clears the command buffer must precede all command lines except A/ and +++.
A/: This command re-executes the last command in the command buffer.
+++: This is the escape sequence to take the modem from data mode to command mode.
An: If n is not specified, answer incoming ring immediately. If n is specified, auto-answer after n rings where n is 1 to 255
B: The B command defines the communications protocol as follows.
B0: Selects CCITT protocol, which is used in Europe and most countries in the world.
B1: Selects Bell protocol, which is mainly used in the U.S. and Canada.
E: This command is used to enable or disable the echo of command characters and is only effective in command mode.
E0: Disables the echo of command characters.
E1: Enables the modem to echo command characters so they can be viewed and verified on the screen.
H: This command instructs the modem to go on or off hook. On hook means hang-up where
H0: Modem goes on-hook.
H1: Modem goes off-hook.
L: This command adjusts the volume of the modem speaker for call progress monitoring.
L0: Selects low speaker volume.
L1: Selects low speaker volume.
L2: Selects medium speaker volume.
L3: Selects high speaker volume.
M: This is the speaker on-off control.
M0: Turns the speaker off at all times.
M1: Turns the speaker on until a connection is established.
M2: Turns the speaker on at all times.
M3: Turns the speaker on until carrier is detected, is turned off when
dialing.
N: Sets the number of times the modems will redial if busy. The redial times counter is cleared to 0 after a connection is
made.
String: N=n Range: n=0-15 Unit: Time Default: 0
: Sets the interval between redials.
String: N5=n Range: 0-255 Unit: 2 seconds Default: 0
N?: Displays the current settings of the DLM4000s redial times.
N5?: Displays the interval time between redials.
P: Instructs the modem to use pulse dialing to dial a number. ATDT P 882-2206
Q: Enables or disables the sending of response codes after a command line is executed.
Q0: Enable the sending of response codes.
Q1: Disable the sending of response codes.