ZyXEL Communications P-334W - Manual (Page 259)

Prestige 334W User’s Guide
Media Bandwidth Management 18-5
Table 18-2 Media Bandwidth Management Priorities
Priority Levels: Traffic with a higher priority gets through faster while traffic with a lower priority is
dropped if the network is congested.
High
Typically used for voice traffic or video that is especially sensitive to jitter (jitter is the
variations in delay).
Mid
Typically used for “excellent effort” or better than best effort and would include important
business traffic that can tolerate some delay.
Low
This is typically used for non-critical “background” traffic such as bulk transfers that are
allowed but that should not affect other applications and users.
18.1.6 Bandwidth Management Services
The following is a description of the services that you can select and apply media bandwidth management to
in BW Setup.
Xbox Live
This is Microsoft’s online gaming service that lets you play multiplayer Xbox games on the Internet
via broadband technology. Xbox Live uses port 3074.
VoIP (SIP)
Sending voice signals over the Internet is called Voice over IP or VoIP. Session Initiated Protocol
(SIP) 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.
SIP is transported primarily over UDP but can also be transported over TCP, using the default port
number 5060.
FTP
File Transfer Program enables fast transfer of files, including large files that may not be possible by
e-mail. FTP uses port number 21.
E-Mail
Electronic mail consists of messages sent through a computer network to specific groups or
individuals. Here are some default ports for e-mail:
POP3 - port 110
IMAP - port 143
SMTP - port 25
HTTP - port 80