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Addendum
Addendum
Attaching Loudspeaker Systems
External Music (MOH) Socket
Installation & Maintenance
INDeX 30
A page call to any DT telephone where the handset is physically off-hook and the
telephone is idle (not receiving dial tone) is directed to the handset speaker rather
than the DT loudspeaker. This option allows external loudspeaker systems to be
connected to the DT's handset cord socket.
The DT linked external loudspeaker can be paged directly or as part of a group with
other telephones.
The external loudspeaker system must be CE marked to indicate compliance with
EMC (EN41003) and Low Voltage (EN60950) directives. This is mandatory with the
EU countries for all electrical products.
– Loudspeaker Impedance :
The matching impedance of the external loudspeaker should be 150 ohms.
– Voltage Levels :
The typical voltage levels on the DT handset Rx output are:
– DT Set to minimum volume: 55mV p-p.
– DT Set to maximum volume: 555mV p-p.
– Wiring of plug : RJ 11 Pins 2 & 3 (inner pair).
INDeX Control Cabinets have a single 3.5mm stereo jack socket for the connection
of an external music source.
Inputs of up to 2V p-p into 600ohms can be used, which matches the typical output
of a CD player. In order to maintain CE compliance of the INDeX system, the
appropriate INDeX cable must be used and the connected music source must be CE
marked.
When using music from an external source or recording onto cassette modules,
users should be aware of and conform to the local requirements of copyright and
Attaching Loudspeaker Systems - Page 51
Copyright Warning
public performance.
38DHB0002UKDF- Issue 4 (07/2001)
Addendum - Page 51
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