
Allied Data Technologies
11
ATB
CCITT/ RING modulation
With this command, the modem uses CCITT- or RING modulation for
connections with a speed of 300 or 1200 bps, depending on the
parameter entered. The default setting CCITT is used for all other speeds.
0 - CCITT modulation (default
1 - RING modulation
AT\B
Break signal to other modem
With this command, during a connection without error correction the
modem sends a break signal to the other modem, the length of which
depends on the specified parameters. During a connection with error
correction, the break signal is sent by the active error correction protocol,
but without an indication of the length. If there is no connection or FAX
mode is active, the ERROR message is issued.
1 - 9 Length of the break signal in units of 100 ms (default = 3).
(This only applies to connections without error correction.)
AT%C
Data compression mode
This command selects the MNP5 and/or V42bis mode for data
compression. This mode can only be used with a connection with error
correction.
0 - data compression off
1 - MNP5 data compression on
2 - V42bis data compression on
3 - V42bis and MNP5 on, automatic selection (default)
AT&C
DCD status (carrier detect)
This command is used to set the operation of DCD.
0 - DCD is always on (not visible on LED indicator)
1 - DCD monitors the carrier status on the line (default)
AT#CID
Dutch Calling Line Identification