GR64 Integrators Manual
Page: 62/104
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Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable
5.11.1.3
Control Signals (DTR1, DSR1, DCD1, RI)
5.11.1.3.1
Data Terminal Ready (DTR1)
DTR indicates that the DTE is ready to receive data. It also acts as hardware ‘hang-
up’, terminating calls when switched high. The signal is active low. Users can define
the exact behaviour of DTR with the AT&D command. DTR1 is used as an optional
sleep control mechanism when the Wireless CPU is configured appropriately.
5.11.1.3.2
Data Set Ready (DSR1)
DSR indicates that the DCE is ready to receive data. The signal is active low.
Behaviour is controlled using the AT&S command. DSR1 is used as an optional sleep
control mechanism when the Wireless CPU is configured appropriately.
5.11.1.3.3
Data Carrier Detect (DCD1)
DCD indicates that the DCE is receiving a valid carrier (data signal) when low.
Behaviour is controlled using the AT&C command.
5.11.1.3.4
Ring Indicator (RI)
RI indicates that a ringing signal is being received by the DCE when toggled low.
Users can define the exact behaviour of RI with an AT command, including the option
of asserting the RI signal to flag an incoming SMS by using the AT*E2SMSRI
command.
