ZyXEL Communications P-661HW Manuale Utente

P-661H/HW Series User’s Guide

Chapter 3 Wizards

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To access this wizard, open the web configurator (see 

) and click 

BANDWIDTH MANAGEMENT SETUP in the wizard main screen.

Activate bandwidth management and select to allocate bandwidth to packets based on the 
services.

Figure 34   Bandwidth Management Wizard: General Information

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.

Table 21   Media Bandwidth Management Setup: Services (continued)