Telex MCE325 Benutzerhandbuch

2-2

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Top cover removal.

The four channels of the MCE325 may be assigned to intercom lines in a variety of ways. 
Channel assignment is determined by the settings of DIP switches DS1 through DS3 and jumpers 
J6, J7, J19, and J20. There are six possible intercom line configurations. These are listed in Table 
2.3 together with the proper DIP switch and jumper settings for each.

NOTE

The terms “two-channel mode” and “four-channel mode” apply only to two-wire lines. In two-
channel mode, each two-wire line uses two channel selector buttons: one for talk and one for 
listen. In four-channel mode, each two-wire line uses one channel selector button for both talk and 
listen.

The two-channel mode should be selected under only two circumstances:

When only one or two two-wire lines are connected to channels one and two only.

DIP switch functions and default settings.

DS1

four-wire CH A output not installed (off), four-wire CH A output installed 
(on)

Off

DS2

four-wire CH B output not installed (off), four-wire CH B output installed 
(on)

Off

DS3

two-channel mode (off)*, four-channel mode (on)

Off

DS4

Front panel setup lock-out disabled (off), Front panel setup lock-out 
enabled (on)

Off

DS5

Listen and talk muted during ISO (off), Talk only muted during ISO (on) Off

DS6

Not used

Off

DS7

Talk-off transmit disabled (off), Talk-off transmit enabled (on)

On

DS8

VOX disabled (off), VOX enabled (on)

Off