NEC 5140 - Manual (Page 6)

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ABOUT THE 5140 IP APPLIANCE
The Mitel Networks 5140 IP Appliance is a digital telephone that also serves
as a gateway to your company network, providing you with real-time access
to applications and services such as web browsing, directory management
and visual voice mail.
The 5140 IP Appliance features a full-duplex speakerphone that allows you
the freedom to work at your computer during calls; the six command keys
and nine programmable quick keys provide convenient access to features.
Programming the quick keys is simple thanks to the easy-to-follow screen
prompts. For even easier programming use the Desktop Tool, a companion
application for the 5140 IP Appliance that runs on a PC.