ZyXEL Communications G.SHDSL.bis 4-port Security Gateway P-793H - Manual (Page 62)

P-793H User’s Guide
62 Chapter 3 Wizards
The following table describes the services you can select.
To access this wizard, open the web configurator (see Section 2.2 on page 45 ) and click
BANDWIDTH MANAGEMENT SETUP in the wizard main screen.
Table 12 Bandwidth Management Setup: Services
SERVICE DESCRIPTION
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
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.
NetMeeting
(H.323)
A multimedia communications product from Microsoft that enables groups to
teleconference and videoconference over the Internet. NetMeeting supports VoIP,
text chat sessions, a whiteboard, and file transfers and application sharing.
NetMeeting uses H.323. H.323 is a standard teleconferencing protocol suite that
provides audio, data and videoconferencing. It allows for real-time point-to-point
and multipoint communication between client computers over a packet-based
network that does not provide a guaranteed quality of service.
H.323 is transported primarily over TCP, using the default port number 1720.
VoIP (H.323) Sending voice signals over the Internet is called Voice over IP or VoIP.
H.323 is a standard teleconferencing protocol suite that provides audio, data and
videoconferencing. It allows for real-time point-to-point and multipoint
communication between client computers over a packet-based network that does
not provide a guaranteed quality of service.
H.323 is transported primarily over TCP, using the default port number 1720.
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.
Telnet Telnet is the login and terminal emulation protocol common on the Internet and in
UNIX environments. It operates over TCP/IP networks. Its primary function is to
allow users to log into remote host systems. Telnet uses TCP port 23.
TFTP Trivial File Transfer Protocol is an Internet file transfer protocol similar to FTP, but
uses the UDP (User Datagram Protocol) rather than TCP (Transmission Control
Protocol).
WWW The World Wide Web (WWW) is an Internet system to distribute graphical, hyper-
linked information, based on Hyper Text Transfer Protocol (HTTP) - a client/server
protocol for the World Wide Web. The Web is not synonymous with the Internet;
rather, it is just one service on the Internet. Other services on the Internet include
Internet Relay Chat and Newsgroups. The Web is accessed through use of a
browser.