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Note: The Expansion Module option is purchased separately as a standalone unit. For
instructions on how to connect it to the phone, see the C450HD and C455HD Expansion
Module Installation Guide.
Warning: Prior to connecting power, refer to the Compliancy and Regulatory Information
document at https://www.audiocodes.com/library/technical-documents
.
To cable the phone:
1. [Refer to the illustration below] Connect the short, straight end of the phone cord to the
handset and the longer straight end of the cord to the handset jack on the phone.
2. (Optional) Connect a headset to the RJ-9 headset port , or to the white USB port .
4. Connect the RJ-45 PC port to a computer with a CAT5 / 5e straight-through Ethernet cable.
5. Connect the connector tip of the AC power adapter to the phone's DC 12V power socket and
connect the two-prong AC adapter directly to the electrical wall outlet. When the phone powers
up, all the LEDs momentarily light up.
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