Configuring your router, Troubleshooting the phone proxy, Debugging information from the security appliance – Cisco ASA 5505 User Manual
Page 1009
48-27
Cisco ASA 5500 Series Configuration Guide using the CLI
Chapter 48 Configuring the Cisco Phone Proxy
Troubleshooting the Phone Proxy
Configuring Your Router
Your firewall/router needs to be configured to forward a range of UDP ports to the IP phone. This will
allow the IP phone to receive audio when you make/receive calls.
Note
Different Cable/DSL routers have different procedures for this configuration. Furthermore most
NAT-capable routers will only allow a given port range to be forwarded to a single IP address
The configuration of each brand/model of firewall/router is different, but the task is the same. For
specific instructions for your brand and model of router, please contact the manufacturer’s website.
Linksys Routers
Step 1
From your web browser, connect to the router administrative web page. For Linksys, this is typically
something like
http://192.168.1.1
.
Step 2
Click Applications & Gaming or the Port Forwarding tab (whichever is present on your router).
Step 3
Locate the table containing the port forwarding data and add an entry containing the following values:
Step 4
Click Save Settings. Port forwarding is configured.
Troubleshooting the Phone Proxy
This section includes the following topics:
•
Debugging Information from the Security Appliance, page 48-27
•
Debugging Information from IP Phones, page 48-31
•
IP Phone Registration Failure, page 48-32
•
Media Termination Address Errors, page 48-40
•
Audio Problems with IP Phones, page 48-41
•
Debugging Information from the Security Appliance
This section describes how to use the debug, capture, and show commands to obtain debugging
information for the phone proxy. See the command reference for detailed information about the syntax
for these commands.
lists the debug commands to use with the phone proxy.
Table 48-3
Port Forwarding Values to Add to Router
Application
Start
End
Protocol
IP Address
Enabled
IP phone
1024
65535
UDP
Phone IP address
Checked
TFTP
69
69
UDP
Phone IP address
Checked