The Poly VVX Sidecar 28 – Color, is designed to work with either a Poly VVX 300, VVX 301, VVX 310, VVX 311, VVX 400, VVX 401, VVX 410, VVX 411, VVX 500, VVX 501, VVX 600, or VVX 601 IP Phone. Provides 3 logical pages of 28 line keys per device.
The Poly EM50 Expansion Module extends the functionality of your Poly VVX 450 business IP phone with multifunctional line keys that can be set up as line registrations, call appearances, speed dials, direct stations and/or busy lamp field keys. The VVX EM50 Expansion Module seamlessly matches the look and feel of your VVX 450 business IP phone.
Expand personal interaction within departments while increasing responsiveness to inbound callers with the optional Cisco IP Phone 8800 Series Key Expansion Module. Designed for receptionists, administrative staff, managers, and executives, this module simplifies communications with single-button access to the people and features your staff use most.