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COMSPHERE 3900 Series Modems
AT
Command
&Fn
Select Factory Default Configuration Options. Loads factory configuration
options into Active (Operating) area.
&F0
&F1
&F2
&F3
&F4
&F5
&F6
&F7
&F8
Only the &F0 and &F3 commands will leave you in AT Command mode.
The other commands will take you out of AT command control and place
the modem into Dumb mode. The only way to return to AT command
control is via the diagnostic control panel (DCP).
&Gn
V.22bis Guard Tone.
&G0
&G1
&G2
NOTE: The V.22bis Guard Tone cannot be disabled in some countries.
&In
Dial Transmit Level.
The AT command is &In, where n is
0 for –1 dBm
1 for –1 dBm
32 for –32 dBm
NOTE: In North America the range of allowable values is –10 dBm to
&Ln
Leased Mode.
&L0
&L1
&L2
&L3
&L4
The &L command will cause the modem to reset before entering or
exiting Leased-Line mode. Therefore, it must be entered as the last
command in an initialization string.
14-10
391x Series AT Commands
Description
Async Dial
Sync Dial
Sync Leased: Answer
UNIX Dial
Sync Leased: Originate
Async Leased: Answer
Async Leased: Originate
TMp: Control
TMp: Trib
Disable.
550 Hz.
1800 Hz.
–32 dBm. This command is disabled in some countries (it
answers OK but does not change the level).
Disables leased-line operation.
2-wire originate leased-line operation.
4-wire originate leased-line operation.
2-wire answer leased-line operation.
4-wire answer leased-line operation.
Table 14-2
(6 of 10)
September 1998
DCP LCD
Command
Sequence
Configure/
Factory
Configure\Edit\
Dial Line
Configure\Edit\
Dial Line
Configure\Edit\
Leased Line
3910-A2-GN32-40
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