4-11
Issue 3 April 1994
Table 4-1. AT Command and S-Register Reference (10 of 27)
AT
Command
or
S-Register
Description
&
I
n
Transmit Level
This command sets the power level the modem uses
to transmit data over dial lines. The transmit output
level can range from –10 dBm to –25 dBm. Note that
values below –25 dBm are for future use.
NOTE:
The transmit level cannot be changed in some
countries outside of North America. See
Table 4-3 for more information.
The default setting is Permissive (–9 dBm).
&J0
Transmit Level
This command sets the modem transmit level to the
maximum value in Permissive mode (–10 dBm).
NOTE: The transmit level cannot be changed in some
countries outside of North America. See
Table 4-3 for more information.
&J0
&M
n,
&Q
n
Async/Sync Mode and Computer Dialer Type
These commands both set the modem for either
asynchronous or synchronous operation and select the
type of dialing method the modem uses, either AT
commands or DTR dialing. Both the &M0 and &Q0
commands perform the same function.
&M0 or &Q0
Enables asynchronous operation
with AT command protocol dialing.
&Q4
Enables Hayes Autosync mode.
Not available in Model 3760 and
Model 3763.
