Comtrol AT Command Set Rev A - Manual (Page 142)

AT Commands Reference Manual
Conexant 100722B
3-116
It is recommended that systems be set up if possible with separate modems to receive
calls from other land based modems and cellular modems. This is so that land based users
that experience high network attenuation do not have connection problems when
communicating to modems configured for cellular operation.
The above configurations are the minimum additional AT commands may be issued to
change the result messages etc., AT&F is used to ensure that the modem is in a know
state.
Table 3-15 summarizes the mode and resulting transmit levels for both modems
depending on their configuration.
Fax Configuration
It is recommended that fax transmissions be configured to operate at 9600 bps in V.17
mode or 7200 bps in V.29 mode.
Cellular Phone Configuration
To achieve the best operational performance, a cellular data connection should be
attempted in a location where adequate signal strength is observed for the cellular phone.
This condition can be easily monitored on some phones with signal strength indicator. In
locations where even voice calls are unreliable, data connections should not be attempted.
Under some circumstances a special high gain antenna may improve performance.
Additional information regarding the use of the cellular phone and cellular network
should be obtained from the service provider and or cellular phone manufacturer.