Key Extensions
Forum Phone 515/525/535: Extensions and Accessories
213
The following equipment combinations are possible:
The number of key extensions connected to a system telephone (up to three)
can be set in the
Configurator
of the Forum 523/524’s Web Console (in the
menu
Telephony
:
Ports
:
Upn
or
Telephony
:
Devices
:
VoIP Phones
). Here the
keys can also be programmed as call keys or assigned functions or destination
call numbers. Users can change this programming as required.
The maximum distance between the connecting socket that the telephone/
key extension device combination is operating through and the Forum 523/
524 must be less than 1000 metres. You will need a plug-in power supply
unit no. 90035810 to provide power. The power supply unit is plugged into
the last in the series of key extensions.
Key extension …
… with the features
connectable to a
system telephone
Forum 500 Keypad
Paper FP 525/535
– 36 keys with LED indicator
– Labelling on label strips
– Forum IPhone 525
– Forum IPhone 535
Forum 500 Keypad
Display FP 535
– 20 keys with LED indicator
– 3 keys with LED indicator to
shift levels; enables
programming of 60 storage
locations on each key
extension
– Labelling of the keys over
the display; each key is
assigned to a display line
– Forum IPhone 535
Configuration
Needs Power Supply Unit
U
pn
system telephone
No
U
pn
system telephone with 1-3 key exten-
sions
Yes
IP system telephone
Yes
IP system telephone with 1-3 key exten-
sions
Yes
