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User’s Guide and Reference 4 - 9
Modem Command Reference
Result Codes
NO DIAL TONE If X2 or X4 is selected and 1 second of dial tone is
not detected within 5 seconds; or if W dial modifier
is used and 3 seconds of dial tone is not detected
within the time specified by S7
BUSY If busy is detected, and X3 or X4 is selected or if dial
modifier is used
NO ANSWER If “@” dial modifier is used and 5 seconds of
silence is not detected within the time specified by
S7
CONNECT XXXX If a connection is established
NO CARRIER If a connection cannot be established, the abort
timer (register S7) expires; or a character is entered
during the handshake process
En — Command Echo
Parameters 0 or 1
Default 1
Controls the echo of characters received by the modem while the modem
is in the command mode. If both the modem and the software have echo
on, double characters will appear. If no characters appear, then both
character echoes are off.
Examples
ATE0 Inhibits the echoing of commands
ATE1 Enables the echoing of commands
Fn - Select Line Modulation (14400 only)
Parameters 0 through 10, 13 through 19
Default 0
This command can be used to assure that a connection is made only at
the specified speed.
Examples
ATF0 Selects auto-detect mode (equivalent to N1
command)
ATF1 Permit V.21 or Bell 103 connections only based on
ATBn setting.
ATF2 Reserved