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27.1.1999
8HDS50GB_fm5.f
38
Product: HDS-50 (Ext. Handset With Cradle) /
7.4.3 Connector XIN Signals
7.4.4 Microphone
7.4.5 Speaker
7.4.6 Hook
The hook operation is done by use of a reed switch. Hook operation is connected to
the handset earphone terminal.
The operation is as follows:
1 ERP earphone input, HOOK state
2 GND ground
3 GND ground
4 MIC microphone output
Sensitivity: -43 dB ± 6 dB
Vendor and part no: Hosiden KUC2023 or KUB2023
RF decoupling capacitor:
33 pF; Size: 0805; Mounted on the microphone
element.
Sensitivity 95 dB ± 5 dB
Vendor and part no: Hosiden KDR0928-IE-0030
Impedance: min 120 ohm
Resistance (DC): max 3 kohm
ON_HOOK HIGH DC IMPEDANCE (SWITCH OPEN)
OFF_HOOK
LOW DC IMPEDANCE (SWITCH CLOSED), 2.2 KOHM RESIS-
TANCE