Aastra OpenCom 100 Mounting And Commissioning User Manual page 67

Aastra 677x: Extensions and Accessories
Configuration
U system telephone
pn
U system telephone with 1-3 key extensions Yes
pn
IP system telephone
IP system telephone with 1-3 key extensions
IP system telephone with PoE (Power over
Ethernet)
IP system telephone with 1-3 key extensions
and PoE
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!
Please note:
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.
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.
Needs Power Supply Unit
No
Yes
Yes
No
No
Key Extensions
65