Figure 1-6. Electret Headset Option - Siemens 300Series User Manual

Electret Headset Option
The Electret Headset Option (EHO) lets you plug one or two electret
headsets into the installed option and make and answer calls using a
headset instead of the handset or the phone's built-in microphone and
speaker. This type of headset does not require a headset adapter, or
amplifier.
Note: Carbon headsets will not function properly on the EHO.
A selection of electret Siemens headsets is available. See your Siemens
distributor for details.

Figure 1-6. Electret Headset Option

Introduction 1-7