Netgear RH348 User Manual download pdf (Page 22)

Reference Guide for the Model RT328 and Model RH348 ISDN Routers

1-4 Introduction

TCP/IP Support

The Model RT328/RH348 router supports the Transmission Control Protocol/Internet Protocol

(TCP/IP) and Routing Information Protocol (RIP), which ensures that ISDN connections are

established only when passing data.

For further information about TCP/IP, refer to “Basic Router Concepts” on page 1-6.

IP Address Masquerading by Dynamic NAT+

Both NETGEAR routers allow an entire department of networked PCs to share an Internet account

using only a single IP address, which may be statically or dynamically assigned by your Internet

service provider (ISP). This technique, an extension of network address translation (NAT), is

known as IP address masquerading and typically allows the use of a very inexpensive ISP account.

Automatic Conﬁguration of Attached PCs by DHCP

The routers can dynamically assign network conﬁguration information, including IP, gateway, and

domain name server (DNS) addresses, to attached PCs on the LAN using the Dynamic Host

Conﬁguration Protocol (DHCP). This feature greatly simpliﬁes conﬁguration of LAN-attached

workstations.

Security

The Model RT328/RH348 router is equipped with several features designed to maintain security.

These security features are described in this section.

Calling Line Identiﬁcation

The use of Calling Line Identiﬁcation (CLID or Caller ID) ensures that incoming ISDN calling

numbers are checked against known numbers before a call is answered and access is granted,

thus providing a ﬁrst level of security. In many areas, you must speciﬁcally request that CLID

be enabled by the telephone company for your ISDN line. In some regions, CLID may not be

available.

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Netgear RH348 User Manual Page 22