Siemens optiPoint family - Manual (Page 37)

optiPoint ISDN adapter.
Interface for connecting ISDN terminal
equipment such as fax, PC ISDN board or
video conference equipment.
optiPoint acoustic adapter.
Connecting interface for external
loudspeaker, microphone, headset or
additional optical/acoustic signal source.
optiPoint recorder adapter.
Connecting interface for an external
speech recorder or a second earpiece.
optiPoint IP adapter.
This converts your optiPoint 500
telephone into an IP telephone suitable
for use on the LAN network.
performance .
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