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The LCOB can be installed on the LCOB/STIB/CBIB connector, and provides 4 CO/PBX Loop Start CO Line interfaces that support Pulse/DTMF signaling. Each Interface contains ring and loop current detection circuits, A/D and D/A conversions, and pulse signaling circuitry.

LCOB can be optionally equipped with add-on boards: CPCU4 (FSK CID, Polarity Reversal & Call Progress Tone detection Unit 4) to detect FSK signal for the incoming Caller-ID, polarity reversal and call progress tone, CPCU4D (DTMF CID, Polarity Reversal & Call Progress Tone detection Unit 4) to detect DTMF signal for the incoming Caller-ID, polarity reversal and call progress tone, PRCPTU4 (Polarity Reversal & Call Progress Tone detection Unit 4) to monitor polarity reversal and call progress tone, or PRU4 (Polarity Reversal detection Unit 4) to monitor polarity reversal.

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Ring Detect Sensitivity

30Vrms @ 16-55Hz

DTMF Dialing

Frequency Deviation

Less than +/-1.8%

Signal Rise Time

Max.5ms

Tone Duration, on time

Min.50ms

Inter-digit Time

Min.30ms

Pulse Dialing

Pulse Rate

10 PPS

Break/Make Ratio

60/40% or 66/33%

Operating

Temperature

0()-40()

Environment

Humidity

0-80%(non condensing)