Aastra OpenCom 100 Series Mounting And Commissioning User Manual page 70

Aastra 677x: Extensions and Accessories
Configuration
U system telephone
pn
U system telephone with 1-3 key
pn
extensions
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:
68
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 installation 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 al-
ready connected to OpenCom 100. Pull the network cable out of
the socket before screwing the key extension onto it.
Needs Power Supply Unit
No
Yes
Yes
Yes
No
No