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.
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) |