Ricoh D158 Service Manual page 960

NCU Parameters
Address
Bits 0 and 1 – DCV (TIP/RING) Voltage
Bit 1:0, Bit 0: 0 = 3.1 V
Bit 1:0, Bit 0: 1 = 3.2 V
Bit 1:1, Bit 0: 0 = 3.35 V
Bit 1:1, Bit 0: 1 = 3.5 V
Bits 2 and 3 – MINI (minimum loop electric current)
6805E3 Bit 2:0, Bit 3: 0 = 10 mA
Bit 2:0, Bit 2: 1 = 12 mA
Bit 2:1, Bit 3: 0 = 14 mA
Bit 2:1, Bit 3: 1 = 16 mA
Bits 6 and 7 – ACIM (AC impedance)
Bit 7:0, Bit 6: 0 Bit 5:0, Bit 4: 0= 600
Bit 7:0, Bit 6: 0 Bit 5:1, Bit 4: 0= TBR21
Bit 0 – OHS (on hook speed)
0: OHS=0
1: OHS=1
Bit 1 – SQ (spark quench)
0: SQ=00
1: SQ=11
Bit 2 – RZ (call signal Impedance)
0: RZ=0 (high)
1: RZ=1 (low)
Bit 3 – RT (call signal detection level)
0: RT=0 (low)
6805E4 1: RT=1 (high)
Bit 4 – ILIM (DC limitation)
0: ILIM=0 (CTR 21)
1: ILIM=1 (other than CTR 21)
Bit 5 –FILTER
0: FILTER=0 (around 5Hz)
1: FILTER=1 (around 200Hz)
Bits 6 to 7 – Calibration in off hook state
Bit 6:0, Bit 7: 0 = off hook to ACAL:128 ms, off hook to MCAL: 1000 ms
Bit 6:1, Bit 7: 0 = off hook to ACAL:128 ms, off hook to MCAL: 500 ms
Bit 6:0, Bit 7: 1 = off hook to ACAL:128 ms (no MCAL)
Bit 6:1, Bit 7: 1 = off hook to ACAL:8 ms (no MCAL)
D702
Function Unit
118
Remarks
SM