AASTRA DT4x2 for MD Evolution User Guide EN - Manual (Page 152)

Reference
MD Evolution – Cordless DT412 / DT422 / DT432 152
Optional Accessories
You can customize your Aastra telephone to meet your own needs.
All of the following accessories are optional and can be purchased
at your local Aastra contact.
Belt clip, swivel-type
The ordinary belt clip can be replaced with a special swivel-type
belt clip adapted to firmly place your phone onto your belt.
Leather casing
The leather casing may not be used in potentially explosive area.
The leather casing is especially designed for the phone.The leather
casing is especially designed for the phone. The casing comes with
the swivel-type belt clip and the phone is fully operational while
placed in the casing.
Headset
A headset is recommended if you frequently use the phone, and/or
want to have both hands free. The phone has a special headset
connector that is waterproof. The headset comes in three versions;
with microphone integrated in the cable (GSM type)*, with
microphone on a boom*, and with hearing protection (Peltor). An
adapter*, that makes it possible to connect other standard types of
Peltor headsets, is also available.
Notes:
*mic on cable, mic on boom and headset adapter may not
be used with DT432.
The phone must be equipped with the factory mounted
headset connector.
The headset answering button is only active during a call or
when the telephone is ringing and cannot be used to get a
line when making a call.
Security chain
The security chain is 800 mm long. Fasten one end to the hinge-
type belt clip and the other end to, for example, your pocket.