Getting a Choppy Line while Making a Call Using a Cisco VOIP Router

From Asterisk Australia

Q. What can I do if I am getting a choppy line while making a call using a Linksys VOIP Router?

The Quality of Service (QoS) ensures better service to high-priority types of network traffic, which may involve demanding and real-time applications, such as Internet phone calls or videoconferencing. If you are getting a choppy line while making a call using the WRTP54G, you need to enable QoS on the router and enable ports 256 and 512. To enable the VOIP ports on the router follow the directions below. </p>

Enabling Ports 256 and 512 on Linksys VOIP Router 

Step 1:
Access the router's web-based setup page. For instructions, click <a href="../../../../en/US/products/ps10024/products_qanda_item09186a0080a35691.shtml">here</a>. 

Step 2:
When the router's web-based setup page appears, click Applications