Aastra OpenCom X320 - Page 67

Aastra 677x: Extensions and Accessories Key Extensions
65
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 OpenCom 100’s
electronic components. Make sure you discharge
yourself and your tools before and during any in-
stallation work on the OpenCom 100 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 OpenCom 100. Pull the telephone plug
out of the socket before screwing the key extension onto it.
Configuration Needs Power Supply Unit
U
pn
system telephone No
U
pn
system telephone with 1-3 key extensions Yes
IP system telephone Yes
IP system telephone with 1-3 key extensions Yes
IP system telephone with PoE (Power over
Ethernet)
No
IP system telephone with 1-3 key extensions
and PoE
No