Chapter 4: Configuring Sip, Spcp, And Nat; Session Initiation Protocol And Cisco Ip Phones - Cisco Small Business SPA509G Administration Manual

Configuring SIP, SPCP, and NAT

Session Initiation Protocol and Cisco IP Phones

Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
The Cisco SPA IP Phones use the following protocols:
• Session Initiation Protocol (SIP)—Cisco SPA300 Series, Cisco SPA500
Series, WIP310
• Cisco Smart Phone Control Protocol (SPCP)—Cisco SPA300 Series, Cisco
SPA500 Series
This chapter describes how to configure the phone protocols and other
parameters. It contains the following sections:
• Session Initiation Protocol and Cisco IP Phones, page 102
• Configuring SIP, page 105
• Configuring SPCP on the Cisco SPA525G/525G2, page 127
• Configuring SPCP on the Cisco SPA300 Series and Cisco SPA50XG,
page 128
• Network Address Translation (NAT) and Cisco IP Phones, page 128
Cisco IP phones use Session Initiation Protocol (SIP), allowing interoperation with
all ITSPs supporting SIP.
SIP handles signaling and session management within a packet telephony
Signaling
network. allows call information to be carried across network
Session management
boundaries.
The following diagram shows a SIP request for connection to another subscriber in
the network.
controls the attributes of an end-to-end call.
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