• NAT Mapping with SIP-ALG Router: NAT mapping can be achieved by using a router that has a SIP
Application Layer Gateway (ALG). By using a SIP-ALG router, you have more choices in selecting an
service provider.
• NAT Mapping with a Static IP Address: NAT mapping with an external (public) static IP address can
be acheived to ensure interoperability with the service provider. The NAT mechanism used in the router
must be symmetric. For more information, see Determine Symmetric or Asymmetric NAT, on page 392.
Use NAT mapping only if the service provider network does not provide a Session Border Controller
functionality. For more information on how to configure NAT mapping with a static IP, see Configure
NAT Mapping with the Static IP Address , on page 387.
• NAT Mapping with STUN: If the service provider network does not provide a Session Border Controller
functionality and if the other requirements are met, it is possible to use Session Traversal Utilities for
NAT (STUN) to discover the NAT mapping. For information on how to configure NAT mapping with
STUN, see Configure NAT mapping with STUN, on page 391.
Enable NAT Mapping
You must enable NAT mapping to set NAT parameters.
Before you begin
Access the phone administration web page. See Access the Phone Web Interface, on page 104.
Procedure
Step 1 Select Voice > Ext(n).
Step 2 Set up the fields as described in NAT Mapping Parameters, on page 386.
Step 3 Click Submit All Changes.
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
385
Cisco IP Phone Installation
Enable NAT Mapping
To Next Page
Loading...
Need help?
General
