Telex MCE325 Benutzerhandbuch

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be assigned to a four-wire channel. The program assigned to channels is interrupted during talk 
output.

A ¼-inch phone jack is provided for connection of an external speaker (8-ohms minimum 
impedance). The speaker output is compatible with the MCS325 speaker.

Standard Options on the 25-pin, female, D-Sub connector are:

Unswitched microphone output

ISO connection to a VCP6A/VCP12A/VCP12B

Microphone on/off switch

Remote headset

Remote panel microphone

Separate inputs for +10 to +15 volts DC, and +17 to +24 volts DC

Common/ground circuit

Four-wire channel A and B inputs

Remote speaker mute

Key outputs

Three methods of programming are used: 

Front panel programming via the channel selector and operation buttons.

Internal programming via circuit board DIP switches.

Internal programming via circuit board jumpers.

The most commonly programmed options are assigned to the front panel for convenience. 
Detailed information on internal programming is provided in Section 2, Installation. Detailed 
information on front panel programming is provided in Section 3, Operation.

The MCE325 is designed for local powering, and is supplied ready for use with either 115 or 230 
VAC (but not both). The unit may also be powered from an external DC source connected at the 
Auxiliary (J22) connector on the rear panel. For information on changing the AC supply voltage 
configuration, or using DC power, see Section 2.

Mounting configurations are illustrated in Figure 2.3 and include rack mount speaker station, 
console mount headset station, rack mount headset station, desk top headset station, and portable 
speaker station. Some mounting configurations may require a remotely located microphone or 
headset. These may be connected to the Auxiliary connector (J22) on the back of the unit.