Cisco 8800 Series, Manual

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combination is used. This method is restrictive because an external host can send a packet to a particular port
on the internal host only if the internal host first sent a packet from that port to the external host.
This procedure assumes that a syslog server is configured and is ready to receive syslog messages.
To Determine Whether the Router Uses Symmetric or Asymmetric NAT:
Before you begin
• Verify that the firewall is not running on your PC. (It can block the syslog port.) By default, the syslog
port is 514.
• Access the phone administration web page. See Access the Phone Web Interface, on page 104 .
Procedure
Step 1 Select Voice > System and navigate to Optional Network Configuration section.
Step 2
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 3
Set the Debug Level to Error , Notice , or Debug .
Step 4 To capture SIP signaling messages, click the
Ext
tab and navigate to
SIP Settings
. Set the
SIP Debug Option
to
Full
.
Step 5 To collect information about what type of NAT your router uses click the SIP tab and navigate to NAT
Support Parameters .
Step 6
Click Voice > SIP and navigate to NAT Support Parameters .
Step 7 Set
STUN Test Enable
to
Yes
.
Step 8 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 9
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.
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
393
Cisco IP Phone Installation
Dial Plan