C – enable/disable data compression, Dn – dialling command – Westermo TD-32 User Manual
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%C – Enable/disable data compression
Enables or disables data compression negotiation. The modem can only perform data compression on
an error corrected link. The parameter value is written to S41 bit 0 and 1.
%C0
Disables data compression. Resets S41 bit 1 to 0.
%C1
Enables MNP 5 data connection. Resets S41 bit 1.
%C2
Enables V.42bis compression. Sets S41 bit 1.
%C3
Enables both MNP 5 and V.42 compression.
Sets S41 bit 1. (Default)
Please also refer to AT\Nn
Dn – Dialling command
This command directs the modem to go on-line and dial according to the string entered after D.
If no dial string or any other character (according to below) is supplied, the modem will go on-line
and attempt the handshake in originate mode, (dialling mode).
The command D can also be followed by other characters than numbers, these are as following:
*
Sends the DTMF tone corresponding to * on a regular phone.
#
Sends the DTMF tone corresponding to # on a regular phone.
A-D
Sends the DTMF tones corresponding to these.
J
Attempts to connect this call with MNP 10 link negotiation.
(also refer to AT*H)
K
Enables power level adjustment during MNP 10 link negotiation. (also refer to ATMn)
L
An L immediately after ATD makes the modem re-dial the last number.
P
The modem selects pulse dialling. In most countries this is not available.
T
The modem selects tone dialling (DTMF). This is normally used by the modem why it is
not necessary to use T when dialling a number.
S=n
The modem dials the number stored in the directory with &Z. (n = 0 to 19)
W
The modem will wait for dial tone before dialling the rest of the numbers.
,
A comma gives a pause in dialling. The length is determined by the value in register S8.
Note! It is neither allowed nor advisable to use comma to wait for a new dialling tone.
Use W instead.
;
Semicolon in the end of a dialling command returns the modem to command mode and it
allows the user to issue additional ”AT” commands to the modem.
^
The calling tone that otherwise is heard during a dial attempt, is not activated during this
specific dial attempt.
(-)
Brackets, hyphens and spaces have no function and these can be used to format the com-
mand line.
If ATD.. returns ERROR the ATX0 is probably set in a country that does not allow blind dialling.
Please also refer to ATA, ATX, AT&Z, S6, S7, S8, S9, S30