Configuring Spcp On The Spa525G; Network Address Translation (Nat) And Cisco Ip Phones - Cisco SPA942 - - IP Phone Administration Manual

Configuring SIP, SPCP, and NAT

Configuring SPCP on the SPA525G

Configuring SPCP on the SPA525G
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
STEP 6

Network Address Translation (NAT) and Cisco IP Phones

Cisco SPA and Wireless IP Phone Administration Guide
The SPA525G can be used as part of a Cisco Unified Communications System.
This system uses SPCP (also called SCCP) for call control features.
To configure SPCP on the SPA525G:
Log in to the web administration interface.
Click Admin Login and advanced.
Click the System tab.
Under System Configuration, in the SPA525-protocol field, choose SCCP.
(Optional) To configure the phone to automatically detect the protocol being used
on the network to which it is connected, in the SPA525-auto-detect-sccp field,
choose yes.
Click Submit All Changes.
NAT is a function that allows multiple devices to share the same public, routable, IP
address to establish connections over the Internet. NAT is present in many
broadband access devices to translate public and private IP addresses. To enable
VoIP to co-exist with NAT, some form of NAT traversal is required.
Some ITSPs provide NAT traversal, but some do not. If your ITSP does not provide
NAT traversal, you have several options.
• NAT Mapping with Session Border Controller, page 110
• NAT Mapping with SIP-ALG Router, page 110
• Configuring NAT Mapping with a Static IP Address, page 110
• Configuring NAT Mapping with STUN, page 111
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