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GS-1524/GS-1548 User’s Guide
93
CHAPTER 16
Auto VoIP
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.
16.1 About Auto VoIP
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.