Telenetics 56 - Manual (Page 135)

AT Commands
Page 127
bit 1 1 = Cellular phone is in use
bit 2 1 = Cellular phone is locked (cannot be used)
bit 3 1 = There is no service for cellular phone (does not indicate signal
strength)
bit 4 1 = Cellular phone is powered on
bit 5 1 = Cellular driver is initialized
bit 6 0 = Reserved (0)
bit 7 1 = Cellular cable detected
Result Codes (typical):
128 (Cellular cable detected)
OK
Application of ^T6 Status Byte
The information obtained by issuing a AT^T6 can be used to determine if the loading of
the cellular phone driver is necessary by the host software. A download is not necessary
if landline (or no cable) is connected to the modem, in which ^T6 will return a value of 0
(bit 7=0). A download is necessary when a cellular cable is detected (implied cellular
phone is also connected), in which ^T6 will return a value of 128 (bit 7=1). Once a driver
is downloaded to the modem, it will be able to operate in landline or cellular mode based
on detection of a cellular cable.
Operation
Once the driver is loaded and the modem is connected to the cellular phone, and the
phone is powered on dial/answer functions will be routed through the phone instead of
the landline DAA, i.e., no special commands are needed to place or answer calls, the
same AT commands and software packages that are used for landline communication
sessions can be used. If the cellular phone is not connected or is powered off dial/answer
functions will be routed through the landline DAA, and if V.42bis connection is
established the cellular phone driver will be purged so that the V.42bis dictionaries can
be increased to their normal size.
While the modem is being used with a cellular phone it will respond with normal result
messages with the following differences in meaning:
NO DIAL TONE Indicates that cellular service is not currently available.
RING Indicates that the cellular phone is receiving an incoming call.