3com 520 Manuale Utente

 

 

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ISDN can also be used to make voice calls

 

 using the 

 

OfficeConnect Remote

 

 

 

from an ordinary telephone 

 

handset, connect faxes and other similar office 

 

equipment. 

 

All OfficeConnect Remote models have 

 

facilities for ISDN data transmission. Some models 

 

have an additional port for voice calls and/or a port 

 

to handle a third category of connection over a 

 

serial WAN port.

 

The WAN port connects to a permanent leased line, 

 

also available from your telephone carrier 

 

organization. Leased lines are available to work at a 

 

range of speeds which incur higher costs the higher 

 

the line speed. The benefit of leased lines is their 

 

permanenc

 

e

 

 and fixed cost. No dialling is required 

 

but unlike ISDN you pay a fixed cost regardless of 

 

whether you transfer little data or high volumes of 

 

data 24 hours a day.

 

Overall ISDN is probably the most cost effective 

 

solution for small businesses. However, if your 

 

requirements to move data between sites is likely to 

 

increase you should consider purchasing the 

 

OfficeConnect Remote model fitted with both ISDN 

 

and WAN ports to ensure increased flexibility. The 

 

range of OfficeConnect Remote units is as follows:

■

 

 

 

 

–

 

 Provides connection 

 

from 10BaseT or Thin Ethernet (10Base2) LANs to 

 

ISDN services for data transfer between remote sites.

■

 

 

 – In addition to the data 

 

transfer facilities, this model has a Voice port allowing a 

 

telephone (or other equipment such as a Fax) to 

 

communicate via ISDN.

■

 

 

 

 

–

 

 This model has the 

 

ISDN and Voice port facilities

 

 

 

and additionally the 

 

ability to connect via a WAN port to a serial leased 

 

line.

 

All of the above models are available with 

 

 or 

 

 

 

ISDN interfaces.

 

Typically, the OfficeConnect Remote is used to 

 

interconnect LANs running protocols such as 

 

Transmission Control Protocol/Internet Protocol 

 

(TCP/IP) or Novell Internetwork Packet Exchange (IPX). 

 

Offering full LAN-to-LAN connectivity at speeds up to 

 

64 Kilobits per second (Kbps) on each ISDN channel 

 

and up to2 Megabits per second (Mbps) on the WAN 

 

port (where fitted), the OfficeConnect Remote is a 

 

compact desktop unit with unrivalled price and 

 

performance.

Rc.bk : RC01.FRM  Page 2  Thursday, July 10, 1997  9:53 AM