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P31003-H3550-S403-4-7620, 02/05
HiPath 3000 V5.0, HiPath 5000 V5.0, Service Manual
10-25
Workpoint Clients
optiPoint 500
10.2.3.4 optiPoint Acoustic Adapter
The optiPoint acoustic adapter is used for connecting
● a headset (121 TR 9-5) (see Section 10.7.2)
● an active loudspeaker box and a desk microphone via the Y cable
● busy display/door opener and secondary bell/light paging, etc. (each with its own power
supply) via floating contacts (not supported when using the adapter on optiPoint 410 and
optiPoint 420).
Notes on the optiPoint acoustic adapter
● The internal components of the optiPoint terminal are deactivated in speakerphone mode
if an external microphone and an external loudspeaker are used (sense lead).
● optiPoint 500 basic does not support the connection of an external microphone to the op-
tiPoint acoustic adapter.
● The speakerphone mode selection is independent of whether the internal or an external
speakerphone is used. External speakerphones have precedence over internal speaker-
phones with the exception of manual intercom and signaling procedures.
● The internal microphone, the transmitter inset and any microphone connected to the opti-
Point acoustic adapter are muted in the “Mute” audio state.
● Ring, alarm and key tones are transferred to the internal loudspeaker and not to an external
loudspeaker connected to the optiPoint acoustic adapter.
Figure 10-15 optiPoint Acoustic Adapter
Assignment of the three connection jacks:
1 Connecting a headset with the following electrical
values (121 TR 9-5):
● Microphone (electret interface):
– max. power: 400 µA,
– supply voltage: 5 V ± 10%
– series resistor: 5 kΩ ± 10%
● Acoustic transformer:
– Impedance: 150 Ω ± 10%
– EBD: 13 dB ± 2.5 dB
2 Connecting a loudspeaker and microphone using Y
cable (see Figure 10-16)
3 Floating contacts (see Table 10-1), load capacity of
max. 5 W at 24 Vac or 60 Vdc
31 2
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