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COMSPHERE 3800 Series Modems
14-8 November 1996 3810-A2-GB30-20
Table 14-1
(6 of 12)
3800 Series AT Commands
AT
Command
Front Panel
Branch
Description
&F
n
(cont’d) If your modem is attached to a cellular telephone, use the &F5 command to
configure the modem for cellular communications. &F5 sets the following
configuration options:
AT
Option
Command Value
Maximum Frame Size \A4
Error Control Mode \N4
Auto-Answer Rings S0 = 3
No Answer Timeout S7 = 120
No Carrier Disconnect S10 = 100
V.32bis Train S43 = 1
V.32bis Autorate S76 = 3
V.42 ARQ Window Size S89 = 9
Cellular Enhancements S91 = 1
If your modem is attached to a normal dial telephone line but sometimes
communicates with a modem that is attached to a cellular phone, use the
&F6 command. &F6 (Cellular(PSTN)) sets the following configuration options:
AT
Option
Command Value
Transmit Level &I99
Error Control Mode \N4
No Answer Timeout S7 = 120
No Carrier Disconnect S10 = 100
V.32bis Train S43 = 1
V.42 ARQ Window Size S89 = 9
Cellular Enhancements S91 = 1
The &F0, &F3, &F5, and &F6 commands leave the modem in AT Command
mode. The other commands place the modem into Dumb mode. The only way
to return to AT command control is via the front panel.
&G
n
V.22bis Guard Tone
&G0 Disable.
&G1 550 Hz.
&G2 1800 Hz.
Configure\Edit\Dial Line