Doro CONGRESS 205 - Manual (Page 15)

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Technical information
Within the battery compartment located on the underside of the telephone you
will find several switches, these switches determine certain technical parameters
when connecting the telephone.
To remove the cover carefully press a small screwdriver (up to Ø 2,5mm) or
similar into the hole to the right of the cover.
Recall time
The recall button timing can be switched between either 100ms (AU/UK/EU)/
300ms (FR)/600ms (NZ), using the R switch located on the underside of the
telephone (within the battery compartment).
Tone/Pulse (Europe only)
Select the required dialling type, Tone (♫) or Pulse (...) using the ♫/ switch
located on the underside of the telephone (within the battery compartment).
Message Waiting indicator
Some PBX systems use a function called Message Waiting. The telephone will
indicate when a call was received by flashing the Massage Waiting light next to
the display.
The switch is located behind the battery cover on the underside of the
telephone.
The MW function operates differently depending on the PBX in question.
Please contact the system controller for more information.
The following four alternatives are available: LED+, LED-, ringer indicator
( ) and high DC voltage (HV).
When the telephone is used in systems without a telephone exchange ( )
should be selected.