Cisco Small Business SPA509G - Page 6

Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 5
Contents
Configuring SIP Settings for Extensions 116
Configuring a SIP Proxy Server 122
Configuring Subscriber Information Parameters 126
Configuring SPCP on the Cisco SPA525G/525G2 127
Configuring SPCP on the Cisco SPA300 Series and
Cisco SPA50XG 128
Network Address Translation (NAT) and Cisco IP Phones 128
NAT Mapping with Session Border Controller 129
NAT Mapping with SIP-ALG Router 129
Configuring NAT Mapping with a Static IP Address 129
Configuring NAT Mapping with STUN 130
Determining Whether the Router Uses Symmetric or Asymmetric NAT 131
Chapter 5: Configuring Security, Quality, and Network Features 133
Setting Security Features 133
SIP Initial INVITE and MWI Challenge 134
SIP Over TLS 134
SRTP and Securing Calls 135
Secure Call Indication Tone 136
Ensuring Voice Quality 136
Supported Codecs 137
Bandwidth Requirements 138
Factors Affecting Voice Quality 139
SIP Publish Signaling Improvements 141
Configuring Voice Codecs 142
Configuring Domain and Internet Settings 146
Configuring Restricted Access Domains 146
Configuring DHCP, Static IP, and PPPoE Information 146
Setting a Static IP Address 147
Configuring Power Settings 148
Configuring PPPoE Settings (Cisco SPA525G/525G2 only) 148
Setting Optional Network Parameters 149
Configuring VLAN Settings for IP Phones 151