Key Extensions
214
Forum Phone 515/525/535: Extensions and Accessories
A system telephone requires a power supply unit if a key extension is installed.
When using PoE, an IP system telephone requires no power supply unit.
Connecting the Key Extension
CAUTION!
Guard against static charges!
Static charges can damage the Forum 523/524’s electronic
components. Make sure you discharge yourself and your tools
before and during any installation work on the Forum 523/
524 and any connected terminals. Use discharging underlays
or antistatic mats where possible.
Please note:Never
attach a key extension to a system telephone that is
already connected to Forum 523/524. Pull the network cable
out of the socket before screwing the key extension onto it.
IP system telephone with PoE (Power over
Ethernet)
No
IP system telephone with 1-3 key exten-
sions and PoE
No
Configuration
Needs Power Supply Unit
Summary of Contents for forum 523
Page 1: ...Forum 523 524 Mounting and Commissioning Manual ...
Page 10: ...8 ...