3com 520 User Manual

 

 

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 

 

.

■

 

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

 

.

 

 

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