User`s guide
dtr  DTR Control 
This command interprets how the radio modem responds to the state of the 
DTR signal and changes to the DTR signal. If the host device (DTE) interface 
does not provide a DTR signal then this setting should always be set to off. 
When DTR control is set to on and the DTR signal is not active, the Radio 
Modem enters a power saving shutdown state. Upon the DTR signal becoming 
active, the Radio Modem will power up, perform a reset and be ready to receive 
data. The Radio Modem will continue to remain in the powered state while DTR 
remains active. 
Command format: 
dtr [s] 
where: s = 
on  The state of the DTR signal will determine the power-on state of 
the radio modem. 
off  The state of the DTR signal is ignored and the radio modem 
remains always on in standby mode. 
batmon  Battery monitoring 
This command enables or disables monitoring of the battery voltage level. 
When battery monitoring is enabled, if the battery level falls below a threshold 
of approximately 5.75 volts, the modem status indicator will begin to flash 
slowly with a 1 second duty cycle. 
Regardless of whether battery monitoring is on or off, if the battery voltage 
drops to below 5.0V the radio modem will enter a reset state and cease to 
function, until the battery is replaced. 
Command format: 
batmon [s] 
where: s = 
on  The voltage level of the battery is monitored. 
off  Battery voltage level monitoring is disabled. 
ctime  Connection Timeout Period 
This command sets the period the radio modem stays connected in an always 
listening state, prior to entering low power standby mode. 
Provided there is no serial data to be sent, the radio modem will delay for the 
set period (1 to 60 seconds) before entering the lower power standby mode. 
Command format: 
ctime [n] 
where: n = 
[1..60] The duration, in seconds, prior to the radio modem entering the 
standby mode. 
User’s Guide    Configuration Commands 3-6 










