Ignition Line; Serial Handling - FALCOM TANGO55/i Hardware Description

TANGO55/ & TANGO56/
I
The actual state of modems is displayed by two LED's at the connector on the top of
interface C of the unit.
600 ms On / 600 ms Off
Green LED (GSM)
Yellow LED
On

4.2.1 Ignition line

The Ignition Line on Interface A uses an internal processor to control the timing of the
"TURN-ON" procedure of the internal GSM modem.
To switch the modem ON the Ignition Line has to be connected to a high voltage
level of (10,8V ... 31,2V). The green LED on interface C shows the progress of the
"TURN-ON" procedure (green indicator light). Enter PIN number of the inserted SIM
card (if required). After a few seconds it will go flashing slowly (that means the
registration into the network is successfully). To switch the modem off the commands
AT+CPOF or AT+CFUN=0 (see AT commands manual) has to be issued. To switch the
modem on again see above.

4.2.2 Serial handling

The GSM/GPRS modem TANGO55/56 allows control of the GSM/GPRS modem over
the interface B or Interface C. The interface B is a implementation of a serial
interface corresponding to EIA-RS232-C.
See table below for details:
CCITT V24 Pin
102 5
103 3
104 2
105 7
106 8
107 6
108 4
109 1
125 9
Table 12: R232 9-pin description
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I
Off
75 ms On / 3 s Off
75 ms On / 75 ms Off/
75 ms On / 3 ms Off
Flashing
On
Off
Description
Signal Ground (GND)
Transmitted Data (TxD).
The DTE uses the TxD line to send data to the interface for
transmission over the Modem.
Received Data (RxD).
The interface uses the RxD to send data received from the
Modem to the DTE.
Request To Send (RTS)
Clear To Send (CTS)
Data Set Ready (DSR)
Data Terminal Ready (DTR)
Data Carrier Detect (DCD)
Ring Indicator (RI)
Modem is off or run in SLEEP mode
No SIM card inserted or no PIN entered, or network search
in progress, or ongoing user authentication, or network login
in progress.
Logged to network (monitoring control channels and user
interactions).
No call in progress.
One or more GPRS contexts activated.
Flashing Indicates GPRS data transfer: When a GPRS
transfer is in progress, the LED goes on within 1 second
after data packets were exchanged.
Flash duration is approximately 0.5 s.
On Depending on type of call:
Voice call: Connected to remote party.
Data call: Connected to remote party or exchange of
parameters while setting up or disconnecting a call.
Power off or interface C in use.
Power on, interface B in use or both interfaces (B & C) are
not connected.
V 1.03
ERSION
Direction
IN
OUT
IN
OUT
OUT
IN
OUT
OUT
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