Polycom CX5500 Administrator's Guide

Polycom CX5500 Unified Conference Station Administrator’s Guide 1.1.0
Polycom, Inc. 105
Once last call return is enabled, you can configure the feature using parameters located in the sip-
interop.cfg template file. The following shows the default value for the call.lastCallReturnString
parameter. The last call return string value depends on the call server you use. Consult with your call
server provider for the last call return string.
When you enable the last call return feature, the phone displays an LCR soft key when it goes off-hook,
as shown next. When you press the LCR soft key, you place a call to the phone address that last called
you.
When you select Last Call Return, you place a call to the phone address that last called you.

Polycom CX5500 Specifications

General

Field of View	360 degrees
Camera Resolution	1920 x 1080
Microphone Range	12 feet (3.6 meters)
Connectivity	USB
Audio Bandwidth	160 Hz to 22 kHz
Speaker	Built-in speaker
Compatibility	Microsoft Lync, Microsoft Skype for Business