OpenPhone 71/73/75 System Telephones Keypad Extensions
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1.4 Keypad Extensions
With a keypad extension, you can extend your system telephone OpenPhone 73/
73 IP and OpenPhone 75/75 IP with additional free programmable keys. The Main
menu functions and destination call numbers can be stored on these keys. In
addition, the system administrator can programme call keys (trunk keys, team
keys, busy keys or direct-call keys) over the configuration software of the commu-
nications system.
Up to three keypad extensions can be connected to system telephones: either
three keypad extensions of the model KeyExtension 73P or three keypad exten-
sions of the model KeyExtension 75D. A combination of these keypad extensions
is, however, not possible.
The following equipment combinations are possible:
Keypad extension … … with the features connectable to a
system telephone
KeyExtension 73P – 36 keys with LED indicator
– Labelling on label strips
– OpenPhone 73
– OpenPhone 73 IP
– OpenPhone 75
– OpenPhone 75 IP
KeyExtension 75D – 20 keys with LED indicator
– 3 keys with LED indicator to
shift levels; enables program-
ming of 60 storage locations
on each keypad extension
– Labelling of the keys over
the display; each key is as-
signed to a display line
– OpenPhone 75
– OpenPhone 75 IP
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