user manual

CHAPTER
17-1
Cisco ASA Series Firewall ASDM Configuration Guide
17
Configuring the Cisco Phone Proxy
This chapter describes how to configure the ASA for Cisco Phone Proxy feature.
This chapter includes the following sections:
• Information About the Cisco Phone Proxy, page 17-1
• Licensing Requirements for the Phone Proxy, page 17-4
• Prerequisites for the Phone Proxy, page 17-6
• Phone Proxy Guidelines and Limitations, page 17-12
• Configuring the Phone Proxy, page 17-14
• Feature History for the Phone Proxy, page 17-22
Information About the Cisco Phone Proxy
The Cisco Phone Proxy on the ASA bridges IP telephony between the corporate IP telephony network
and the Internet in a secure manner by forcing data from remote phones on an untrusted network to be
encrypted.
Phone Proxy Functionality
Telecommuters can connect their IP phones to the corporate IP telephony network over the Internet
securely via the phone proxy without the need to connect over a VPN tunnel as illustrated by
Figure 17-1.