2. L1 N RxD GND TxD GND Rx+ Rx- Tx+ Tx- CL+ CL- MAINS 85-265V 50/60 Hz CONFIGURATION INTERFACE RS-232 COMMUNICATION INTERFACE ANT RS-232 20 mA 85 – 264 Vac Power Supply GSM µP DTE Interface PWR GSM TxD RxD CTS DTR DCD RI Watch DOG WatchDog “tick” LED GSM GPRS Module 4 I/O C

3. INTERFACE + POWER SUPPLY board PROCESSOR board PSTN / ISDN / GSM board DTE-CL 1 2 3 4 AUX 1 2 3 4 I/O 0 1 2 3 4 5 6 7 8 9 DTE RS-232 2 1 - + 3 2 1 N L1 4 3 2 1 A B PS- lowPS- highLine

4. DTE-CL 1 2 3 4 RxD + - 20 mA + - +5 V TxD R

5. 1 3 RxD + - 20 mA + - +5 V TxD R loop

6. jumper placed NO jumper n/a PWR GSM TxD RxD CTS DTR DCD RI J1 J2 JP6 JP5 JP2 JP1 J4 J5 X X X X X X X X X X X J4 J5 24 hour J4 J5 6 hour J4 J5 12 hour J4 J5 1 hour

9. L1 N MAINS 85-265V 50/60 Hz CONFIGURATION INTERFACE RS-232 RxD GND TxD GND COMMUNICATION INTERFACE ANT I/O 0 1 3 4 L1 N MAINS 85-265V 50/60 Hz CONFIGURATION INTERFACE RS-232 RxD GND TxD GND COMMUNICATION INTERFACE PSTN or ISDN I/O 0 1 3 4