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MODEM. A COMMUNICATOR THAT ALLOWS INSTRUCTIONS TO BE SENT TO A SYSTEM KEY CABINET VIA A MOBILE PHONE DEVICE.

MODEM. CONNECTS TO THE SYSTEM MAIN BOARD AND AN EXTERNAL TELEPHONE LINE ALLOWING REMOTE CONTROL OF THE CABINET.

A BLUETOOTH ADAPTER THAT MAKES IT POSSIBLE TO USE A BLUETOOTH HEADSET WITH A LANDLINE TELEPHONE. WHEN THE LANDLINE IS BLUETOOTH ENABLED CALLS CAN BE DIALLED AND RECEIVED REMOTELY THROUGH THE BLUETOOTH HEADSET. IT PARTNERS A BLUETOOTH HEADSET OFFERING RELIABLE VOICE COMMUNICATIONS AND OPERATION AT A DISTANCE OF UP TO 15 METRES INDOORS AND 30 METERS OUTDOORS.

ERBIUM DOPED OPTICAL FIBRE AMPLIFIER USED IN LONG HAUL DIGITAL TELECOMMUNICATIONS SYSTEMS, DESIGNED TO EXTEND THE RANGE OF A TELECOMMUNICATION SIGNAL TRANSMITTED VIA OPTICAL FIBRE CABLE. IT IS IN THE FORM OF A PRINTED CIRCUIT BOARD ASSEMBLY THAT IS PLUGGED INTO EITHER A SINGLE 7 FOOT BAY OR AN 11 FOOT HIGH BY 23 INCH WIDE OC- 48 NETWORK BAY.THE MODULE COMPONENTS INCLUDE PUMP LASER AND AN ERBIUM DOPED FIBRE.

800 MHZ INTERNATIONAL DUPLEXER USED IN TELECOMMUNICATIONS WHERE COMMUNICATION TAKES PLACE SIMULTANEOUSLY BETWEEN THE SENDER AND THE RECEIVER. THE SYSTEM INCLUDES TRANSMIT AND RECEIVE DUPLEXER AND TRANSMIT POWER MONITOR.