Truelog Line-interface Modules

Primary Rate Interface
	30 Channel E1 Monitoring Interface High Impedance connection with interchangeable 4-wire Rx/Tx lines Separate indicators define line status of Rx & Tx data streams A single USB port is required for power and data transfer Can be located up to 100m from the line-tap point, using standard indoor telephony cabling Line connection via RJ45 socket

Basic Rate Interface
	2 port (4 channels) So Bus Monitoring Interface High Impedance connection with interchangeable 4-wire Rx/Tx lines Indicators to define L1 status and b1 / b2 in use Uses two USB ports for power and data transfer (one per Basic Rate line) Can be located up to 100m from the line-tap point, using standard indoor telephony cabling Dual paralleled RJ45 sockets (per port) enable the interface to be daisy-chained between the NT and TE equipment

Analogue Interface
	4 Port Analog Monitoring Interface Lines are connected via a single RJ45 socket, with each 2-wire high-impedance port being software configurable for telephony or radio A single USB port is required for power and data transfer Telephony mode employs line-voltage sensing for detection of Error / On hook / Off hook states. Capable of ring detection, DTMF & CLI decoding. Suitable for connection to Analog trunk, GSM router and Analog extension circuits Radio mode employs VOX detection with software programmable threshold, persistence & sustain timing. Capable of ZVEI tone decoding

Primary Rate Interface