ZyXEL Communications P-2304R, Руководство пользователя

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P-2304R-P1 Series User’s Guide
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H A P T E R
1
Introducing the ZyXEL Device
This chapter introduces the main features and applications of the ZyXEL Device.
1.1 VoIP Station Gateway Overview
The P-2304R-P 1 VoIP (Voice over IP) station gateway lets you use traditional analog
telephones to make telephone calls over the Internet. The ZyXEL Device uses SIP (Session
Initiation Protocol), an internationally recognized standard for implementing VoIP.
You can call any landline or mobile telephone as well as IP telephones. You don’t need to
know if the recipient’s connection type is an IP, cellular or landline based service. Calls
received from IP telephones work exactly as you would expect from the traditional telephone
service.
The NAT and DHCP server features allow you to use an Ethernet hub or switch to set up a
private network and allow multiple computers to share a single Internet connection. The
ZyXEL Device also provides content filtering and a firewall for security.
The ZyXEL Device's web configurator allows easy management and configuration.
See
Appendix A on page 223 for a complete list of features.
1.2 Ways to Manage the ZyXEL Device
Use any of the following methods to manage the ZyXEL Device.
• Web Configurator. This is recommended for everyday management of the ZyXEL Device
using a (supported) web browser.
• Command Line Interface. Line commands are mostly used for troubleshooting by service
engineers.
• FTP for firmware upgrades and configuration backup/restore.
• SNMP. The device can be monitored by an SNMP manager. See the SNMP chapter in this
User’s Guide.
1.3 Good Habits for Managing the ZyXEL Device
Do the following things regularly to make the ZyXEL Device more secure and to manage the
ZyXEL Device more effectively.