Cisco 501G Administration Manual page 6

Chapter 5: Configuring Security, Quality, and Network Features
Cisco SPA500 Series and WIP310 IP Phone Administration Guide
Configuring SIP
Configuring SIP Parameters
Configuring SIP Timer Values
Configuring Response Status Code Handling
Configuring RTP Parameters
Configuring SDP Payload Types
Configuring SIP Settings for Extensions
Configuring a SIP Proxy Server
Configuring Subscriber Information Parameters
Configuring SPCP on the SPA525G
Configuring SPCP on the SPA50XG
Network Address Translation (NAT) and Cisco IP Phones
NAT Mapping with Session Border Controller
NAT Mapping with SIP-ALG Router
Configuring NAT Mapping with a Static IP Address
Configuring NAT Mapping with STUN
Determining Whether the Router Uses Symmetric or Asymmetric NAT
Setting Security Features
SIP Initial INVITE and MWI Challenge
SIP Over TLS
SRTP and Securing Calls
Secure Call Indication Tone
Ensuring Voice Quality
Supported Codecs
Bandwidth Requirements
Factors Affecting Voice Quality
Configuring Voice Codecs
Configuring Domain and Internet Settings
Configuring Restricted Access Domains
Configuring DHCP, Static IP, and PPPoE Information
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