Configure The Subscriber Information Parameters; Managing Nat Transversal With Phones; Enable Nat Mapping - Cisco 8800 Series Administration Manual

Configure the Subscriber Information Parameters

Step 2
In the Proxy and Registration section, set the parameter values as described in
page
Step 3 Click Submit All Changes.
Configure the Subscriber Information Parameters
Before you begin
Access the phone administration web page. See
Procedure
Step 1 Select Voice > Ext(n), where n is an extension number.
Step 2 In the Subscriber Information section, set the parameter values as described in
page
Step 3 Click Submit All Changes.

Managing NAT Transversal with Phones

Network Address Translation (NAT) allows multiple devices to share a single, 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. For VoIP to coexist with NAT, NAT traversal is required.
Not all service providers provide NAT traversal. If your service provider does not provide NAT traversal,
you have several options:
• NAT Mapping with Session Border Controller
• NAT Mapping with SIP-ALG Router
• NAT Mapping with a Static IP Address
• NAT Mapping with STUN

Enable NAT Mapping

You must enable NAT mapping to set NAT parameters.
Before you begin
Access the phone administration web page. See
Procedure
Step 1 Select Voice > Ext(n).
Step 2
Set up the fields as described in
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
68
327.
329.
NAT Settings, on page
Access the Phone Web Page, on page
Access the Phone Web Page, on page
320.
Cisco IP Phone Installation
Proxy and Registration, on
88.
Subscriber Information, on
88.