Description
Network Standard
Domain name
DHCP option 15
IP address lease time
DHCP option 41
NTP server
DHCP option 42
Vendor-specific information
Can be used for TR.69 Auto Configurations Server (ACS) discovery.
DHCP option 43
NTP server
NTP server configuration with IPv6
DHCP option 56
Vendor class identifier
DHCP option 60
TFTP server name
DHCP option 66
Vendor-identifying vendor-specific information
Can be used for TR.69 Auto Configurations Server (ACS) discovery.
DHCP option 125
TFTP server
DHCP option 150
Provisioning server IP
DHCP option 159
Provisioning URL
DHCP option 160
Configure the Challenge for the SIP INVITE Messages
The phone can challenge the SIP INVITE (initial) message in a session. The challenge restricts the SIP servers
that are permitted to interact with the devices on a service provider network. This practice significantly
increases the security of the VoIP network through prevention of malicious attacks against the device.
Procedure
Step 1
In the phone web user interface, navigate to
Admin Login
>
advanced
>
Voice
>
Ext(n)
, where n is an
extension number.
Step 2
In the
SIP Settings
section, choose
Yes
from the
Auth INVITE
drop-down list box.
Step 3
Click
Submit All Changes
.
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
123
Security Features
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