System information

Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 5
Contents
Configuring SIP 104
Configuring Basic SIP Parameters 104
Configuring SIP Timer Values 108
Configuring Response Status Code Handling 111
Configuring RTP Parameters 111
Configuring SDP Payload Types 113
Configuring SIP Settings for Extensions 116
Configuring a SIP Proxy Server 122
Configuring Subscriber Information Parameters 124
Configuring the IP Phone Communications Protocol 125
Configuring the Protocol on a Cisco SPA525G or Cisco SPA525G2 126
Configuring the Protocol on a Cisco SPA300 Series or
Cisco SPA500 Series IP Phone 126
Managing NAT Transversal with Cisco IP Phones 126
NAT Mapping with Session Border Controller 127
NAT Mapping with SIP-ALG Router 127
NAT Mapping with a Static IP Address 127
NAT Mapping with STUN 128
Determining Whether the Router Uses Symmetric or Asymmetric NAT 129
Chapter 5: Configuring Security, Quality, and Network Features 131
Setting Security Features 132
Challenging SIP Initial INVITE and MWI Messages 132
Encrypting Signaling with SIP Over TLS 132
Securing Voice Traffic with SRTP 133
Authorizing Secure Calls with a Mini-certification 133
Secure Call Indication Tone 134
Configuring Voice Codecs 134
Configuring Domain and Internet Settings 138
Configuring Restricted Access Domains 138
Configuring DHCP, Static IP, or PPPoE Connection Type 138
Configuring Power Settings 140
Setting Optional Network Servers 140