Chapter 5: Configuring Security, Quality, And Network Features; Setting Security Features; Sip Initial Invite And Mwi Challenge - Cisco 501G Administration Manual

Configuring Security, Quality, and Network
Features

Setting Security Features

Cisco SPA500 Series and WIP310 IP Phone Administration Guide
This chapter describes how to configure security, quality, and network features for
the phone. It contains the following sections:
• "Setting Security Features" section on page 97
• "Ensuring Voice Quality" section on page 100
• "Configuring Voice Codecs" section on page 105
• "Configuring Domain and Internet Settings" section on page 108
• "Setting Optional Network Parameters" section on page 111
• "Configuring VLAN Settings" section on page 113
The following features help ensure that calls are secure and authenticated.
• "SIP Initial INVITE and MWI Challenge" section on page 97
• "SIP Over TLS" section on page 98
• "SRTP and Securing Calls" section on page 99

SIP Initial INVITE and MWI Challenge

SIP INVITE (initial) and MWI message in a session can be challenged by the
endpoint. The purpose of this challenge is to restrict the SIP servers that are
permitted to interact with the devices on the service provider network, which
significantly increases the security of the VoIP network by preventing malicious
attacks against the device.
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