Nokia 12 GSM Module Hardware Integration ... - KORE Telematics

• RS-232 translator switches for PORT1 and PORT2/PORT3−−When the RS-232 translators are on, PORT1 and PORT2/PORT3 areconnected the Nokia 12 module via the M2M System Connector.When the RS-232 translators are off, PORT1 and PORT2/PORT3 arenot connected the Nokia 12 module via the M2M System Connector.When the RS-232 translators are off, it is possible to establish aconnection to the Nokia 12 module by using the pin headers (1-4).• Microphone input selection switches−−MIC FROM HSU-3 means that microphone signals are routed from theHSU- 3 connector on the testboard to the Nokia 12 module.MIC FROM PIN HEADER means that microphone signals are routed topins 10 and 11 in pin header X100 on testboard edge.• Communication mode switches−−When the switches are in the normal mode position, the BSI line of theNokia 12 module is floating.When the switches are in the AT mode position, a 68 kohm resistor isconnected between the Nokia 12 module BSI line and ground.Note: To use the normal mode/AT mode settings on the test board, theconnection type setting on the Nokia 12 Configurator must be set to ‘HWDetection’. If the connection type setting on the Nokia 12 Configurator is set to‘AT’, the communication mode switch settings on the Nokia 12 test board areoverridden.The use of the switches on the Nokia 12 test board is illustrated in Figure 12.30/44