Step 3 Click Submit All Changes.
Block Non-Proxy SIP Messages to a Phone
You can disable the ability of the phone to receive incoming SIP messages from a non-proxy server. When
you enable this feature, the phone only accepts SIP messages from:
• proxy server
• outbound proxy server
• alternative proxy server
• alternative outbound proxy server
• IN-Dialog message from proxy server and non-proxy server. For example: Call Session dialog and
Subscribe dialog
Before you begin
Access the phone administration web page. See Access the Phone Web Page, on page 80.
Procedure
Step 1 Select Voice > System.
Step 2 In the System Configuration section, set the Block Nonproxy SIP field as described in the System
Configuration, on page 225.
Step 3 Click Submit All Changes.
Configure a Privacy Header
A user privacy header in the SIP message sets user privacy needs from the trusted network.
You can set the user privacy header value for each line extension using the phone web page.
The privacy header options are:
• Disabled (default)
• none—The user requests that a privacy service applies no privacy functions to this SIP message.
• header—The user needs a privacy service to obscure headers which cannot be purged of identifying
information.
• session—The user requests that a privacy service provide anonymity for the sessions.
• user—The user requests a privacy level only by intermediaries.
• id—The user requests that the system substitute an id that doesn't reveal the IP address or host name.
Cisco IP Phone 7800 Series Multiplatform Phones Administration Guide
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Cisco IP Phone Administration
Block Non-Proxy SIP Messages to a Phone
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