This guide provides instructions on how to assemble and connect Polycom® VVX® EM 50 Expansion
Modules to Polycom VVX 450 business IP phones. A VVX 450 phone can be fitted with up to 2 VVX EM
50 modules.
Note: The VVX EM 50 Expansion Module is only supported on VVX 450 phones, running UC Software
5.8.2 or later.
Connect an Expansion Module to a Phone
Note: It is recommended that the expansion module be configured in the Star2Star portal by an
Administrator prior to installation. (Expansion Module Portal Configuration Guide)
Before connecting an expansion module to a phone, power-down the phone by unplugging the
Internet connection and/or power supply. Remove the stand from the phone, if necessary.
1. Insert the USB plug of the expansion module into the USB port on the side of the host phone.
2. Place the phone and the expansion module upside down on a soft surface.
3. Insert the supplied screw into the bracket screw hole and, using a screwdriver, secure the
expansion module to the phone, as shown.
August 2019
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