Isdn Support - NETGEAR RT338 Reference Manual

• 10M or 100M Ethernet connectivity
– RJ-45 interface allowing connection to a 10BASE-T or 100BASE-T network
– Autosensing
• Analog voice ports
– Provides two RJ-11 interfaces
– Provides CallerID signaling to external attached devices
– Allows a standard analog Public Switched Telephone Network (PSTN) device
(for example, telephone, fax, or modem) to make and receive calls from other ISDN
or PSTN connected devices
– Eliminates the need for a separate PSTN line in a SOHO (small office/home office)
environment
• Front panel LEDs for easy monitoring of status and activity
• Flash EPROM for firmware upgrade
– Upgrade by serial connection or by TFTP over the LAN or WAN
• Five-year warranty
• Free technical support seven days a week, twenty-four hours a day

ISDN Support

The Model RT338 router is designed to take advantage of Integrated Services Digital Network
(ISDN) for transmission of data over digital telephone networks. A basic rate interface (BRI),
which is the usual ISDN implementation, consists of two 64 kilobit per second (Kbps) B channels
for data and one 16 Kbps D channel for control information.
One advantage of using ISDN to connect routers is that the connection is set up only if there is data
to be sent to the remote network. The router sets up a call, transfers the data, and then hangs up
automatically when the connection is no longer needed. In addition, the ISDN call setup takes only
a few seconds, so that a disconnect and later reconnect may not be noticeable by the user.
A nailed-up mode is also supported, allowing the router to dial and hold up a connection,
emulating a leased line.
Introduction
Reference Guide for the Model RT338 ISDN Router
1-3