Guard Tone; Call Detection - 3Com 56K Command Reference Manual

4-6 C 4: D
HAPTER IALING

Guard tone

Call Detection

, A , H
NSWERING AND ANGING
The AT&Gn command only applies to analog overseas calls at 2400 or
1200 bps.
To set your modem for
No guard tone
550-Hz guard tone
1800-Hz guard tone
If you set &G2 you must also send
allows the Business Modem to answer all calls from overseas.
Make/Break Ratio
The AT&Pn command sets the off-hook/on-hook (make/break) interval for
pulse dialing.
To set you modem for
North American make/break ratio (39/61)
United Kingdom make/break ratio (33/67)
Call Detection allows the modem to recognize whether an incoming call
is analog data or fax.
Call Detection is an optional Service Class 2.0 feature and is also
implemented by 3Com for Fax Class 1 applications.
U
P
Command
AT&G0
(Default)
AT&G1
AT&G2
to the modem. This setting
ATB0
Required in these countries
United States and Canada
Some European countries
The U.K. and some Commonwealth
countries
Command
AT&P0
AT&P1