To Determine Whether the Router Uses Symmetric or Asymmetric NAT:
Procedure
Step 1 Verify that the firewall is not running on your PC. (It can block the syslog port.) By default, the syslog port
is 514.
Step 2 Click Voice > System and navigate to Optional Network Configuration.
Step 3 Enter the IP address for the Syslog Server, if the port number is anything other than the default, 514. It is not
necessary to include the port number if it is the default.
The address and port number must be reachable from the Cisco IP phone. The port number appears on the
output log file name. The default output file is syslog.514.log (if port number was not specified).
Step 4 Set the Debug Level to Error, Notice, or Debug.
Step 5 To capture SIP signaling messages, click the Ext tab and navigate to SIP Settings. Set the SIP Debug Option
to Full.
Step 6 To collect information about what type of NAT your router uses click the SIP tab and navigate to NAT
Support Parameters.
Step 7 Click Voice > SIP and navigate to NAT Support Parameters.
Step 8 Set STUN Test Enable to Yes.
Step 9 Determine the type of NAT by viewing the debug messages in the log file. If the messages indicate that the
device is using symmetric NAT, you cannot use STUN.
Step 10 Click Submit All Changes.
Dial Plan
Dial Plan Overview
Dial plans determine how digits are interpreted and transmitted. They also determine whether the dialed
number is accepted or rejected. You can use a dial plan to facilitate dialing or to block certain types of calls
such as long distance or international.
Use the phone web user interface to configure dial plans on the IP phone.
This section includes information that you must understand about dial plans, and procedures to configure your
own dial plans.
The Cisco IP Phone has various levels of dial plans and processes the digits sequence.
When a user presses the speaker button on the phone, the following sequence of events begins:
1. The phone begins to collect the dialed digits. The interdigit timer starts to track the time that elapses
between digits.
2. If the interdigit timer value is reached, or if another terminating event occurs, the phone compares the
dialed digits with the IP phone dial plan. This dial plan is configured in the phone web user interface in
Voice > Ext(n) under the Dial Plan section.
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
71
Cisco IP Phone Installation
Dial Plan
To Next Page
Loading...
Need help?
General
