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Key Extensions 64
Forum Phone 515 / 525 / 535: Extensions and Accessories
1. Plug the key extension’s RJ45 jack into the system telephone’s
RJ45 socket (1).
2. Screw the key extension onto the system telephone (2).
3. Plug the power supply unit’s RJ45 jack into the socket provided
on the right-hand side of the key extension.
4. Pass the power supply unit’s cable through the recesses
provided on the underside of the key extension and the system
telephone.
5. Connect the power supply unit to the mains power supply.
6. Connect the system telephone with the U
pn
or ethernet port.
Underside of the device: key
extension (left) and system
telephone (right)
This symbol on the sys-
tem telephone indicates the
connector for the key
extension. It is on the
underside of the telephone.
This symbol on the key
extension indicates the con-
nector for a further key
extension.
This symbol on the key
extension indicates the con-
nector for the power supply
unit and is on the underside
of the device. This is the
same connector which can
be used instead of connect-
ing an additional key exten-
sion.
1
1
2
2
2
2