ZyXEL Communications ES-1552 - V1.12, User Manual

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ES-1552 User’s Guide
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H A P T E R
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.
16.2 Auto VoIP Settings
Use the Auto VoIP Settings to enable automatic assignment of high priority to VoIP packets
passing through the switch. Click Auto VoIP in the navigation panel to view the following
screen.