7.3 Apparatus line
7.3.1
Connecting the apparatus lines
KDC1905 is compatible with decoders (older “jumper” and new). The principles of creating uniphone networks are
the same as in case of CD1803 control panel. To connect the decoder, use two cables connected to LA+ and LA -
terminals of KDC1905 cassette. Decoders should be connected in parallel .
7.3.2
Message E-2
A message
is displayed in case of excessive current consumption from the apparatus line.
When it is detected, the device line is switched off in order to restore all devices to their initial state. If the current
consumption does not decrease, the device line will be switched off aga in.
In this case, each connection attempt will result in a message
– the connection will not be
realized.
7.3.3
Address type
KDC1905 keyboards enable to use two addressing modes:
•
impulse – compatible with old devices PC255 and PC999, the supported number range is closed in a range of
1-255
•
bits – by default, enabled addressing of a new type, compatible only with PC512 devices, enables addressing
devices up to the number 16 383. This enables to support large housing estates without the need to recalculate
numbers in PBX
Address type changes in parameter 99, setting +1 flag activates bit addressing. After resetting the parameter,
the PBX switches to the old type addressing (impulse, compatible with PC255 ).
Note!
For keyboards with software 8r51 and higher (above serial number 13492), the default addressing mode
is bit addressing. In case of new keyboard installation and any addressing problems (e.g. you can only call number
1), start by switching the addressing mode to the old one (reset parameter 99).
Summary of Contents for KDC1905
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