Polycom SIP 2.2.0 User Manual

Page of 254
Administrator’s Guide SoundPoint IP / SoundStation IP 
2 - 12
—Allows for the setting of TOS settings.
—Employs a 
high-performance jitter buffer and packet error concealment system 
designed to mitigate packet inter-arrival jitter and out-of-order or lost 
(lost or excessively delayed by the network) packets.
—Designed to minimize 
latency for audio packet transmission.
—Conserves network bandwidth by 
detecting periods of relative “silence” in the transmit data path and 
replacing that silence efficiently with special packets that indicate 
silence is occurring.
• Security Features
—Several local settings 
menus are protected with two privilege levels, user and 
administrator, each with its own password.
—Confidential information stored in 
configuration files must be protected (encrypted). The phone can 
recognize encrypted files, which it downloads from the boot server 
and it can encrypt files before uploading them to the boot server.
—When trying to establish a connection to a boot 
server for application provisioning, the phone trusts certificates 
issued by widely recognized certificate authorities (CAs).
—Levels of security are provided for 
validating incoming network signaling.
For more information on each feature and its associated configuration 
parameters, see the appropriate section in 
 on page 
.