User's Manual 2. Setting up the Phone
17 C450HD IP Phone
2.3 Cabling
This section covers how to cable your phone. Use the figure and table below as reference.
Figure 2-3: Cabling
Action Description
Connect the phone's RJ-9 port to the handset cord's longer, straight end.
Connect the handset to the handset cord's short, straight end.
Connect one of the two USB ports to a headset [optional].
Connect the phone’s power socket labelled DC 12V to the connector tip of the AC power
adapter. Connect the two-prong AC adapter directly to the electrical wall outlet.
When the phone powers up, all the LEDs momentarily light up.
Connect the phone's RJ-9 headset jack to a headset [optional]
Connect the RJ-45 PC port to a computer/laptop, using a CAT 5 / 5e straight-through
Ethernet cable
Connect the phone's RJ-45 LAN port to your LAN network (LAN port or LAN switch/router)
using a CAT 5 / 5e Ethernet cable.
Internal use only. FAEs use the port to debug and troubleshoot the phone - after connecting
the AUX (auxiliary) port to a terminal monitor with a serial cable.