3Com 520 - Manual (Page 17)

Introduction 1-3
The principal features of the OfficeConnect Remote are:
■ Easy to install, configure and support .
■ ISDN, 2B+D port, supporting Basic Rate interface of
two 64 Kbps (or two 56 Kbps channels in the USA)
and a 16 Kbps control channel .
■ Optional voice port.
■ Optional Leased line wide area network (WAN)
access port .
■ Data terminal equipment (DTE) management port
■ Support for full IP and IPX routing .
■ Protocol transparent bridging .
■ Sophisticated data packet filtering to provide
network security .
■ Provides NetWare protocol spoofing .
■ Data compression based on an optimized Lempel Ziv
algorithm .
■ Remote and local management .
■ Flash erasable programmable read-only memory
(EPROM), allowing the remote upgrading of the
units operating system.
■ Uses simple network management protocol (SNMP)
and provides management information base (MIB) II
support .
Benefits of ISDN
ISDN is an extension of the national and international
public switched telephone network, which offers a
digital end-to-end telecommunication system,
providing a better quality service than available using
the analog telephone network. The principal
benefits of ISDN are:
■ Fast call setup times, typically taking less than one
second for national calls .
■ Greater bandwidth with multiple channels.
The basic rate service, often referred to as ISDN 2,
carries two 64 Kbps user channels, called B channels
and one 16 Kbps control channel called the
D channel. The line service is presented into the
customers premises through a standard RJ45 socket.
A significant aspect of the ISDN service is that it can be
provided over the same wiring that was installed for
the original telephone service. Therefore, ISDN can be
made available relatively cheaply almost anywhere
that previously had access to the analog system.
The cost of installation and rental of basic rate ISDN
lines has dropped to the point where it is extremely
attractive as regards cost and performance.
Rc.bk : RC01.FRM Page 3 Thursday, July 10, 1997 9:53 AM