ZyXEL Communications GS-1524 / GS-1548 Manual De Usuario

GS-1524/GS-1548 User’s Guide

This chapter shows you how to give higher priority to Voice over Internet Protocol 
(VoIP) packets over other data packets as they pass through the Switch.

Voice over Internet Protocol (VoIP) allows telephone calls to be made over a data 
network like the Internet. With the increased prominence of delay-sensitive 
applications (voice, video, and other multimedia applications) deployed in 
networks today, proper QoS configuration ensures high-quality application 
performance. 

The Auto VoIP feature is intended to provide an easy classification mechanism for 
voice packets so that they can be given high priority in order to provide better 
transmission resulting in higher sound quality for the end users.

The AutoVoIP feature explicitly matches VoIP packets in Ethernet switches and 
provides them with the highest class of service. The AutoVoIP feature provides the 
capability to assign the highest priority for the following VoIP packets:

• SIP – Session Initiation Protocol is an internationally recognized standard for 

implementing VoIP. SIP is an application-layer control (signaling) protocol that 

handles the setting up, altering and tearing down of voice and multimedia 

sessions over the Internet.

• MGCP – Media Gateway Control Protocol is a control and signal standard for the 

conversion of audio signals carried on telephone circuits (PSTN) to data packets 

carried over the Internet or other packet networks.

• SCCP – Skinny Client Control Protocol is a Cisco proprietary protocol used 

between call managers and VoIP phones.