3com 530 Manuel D’Utilisation

 

 

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 1: 

 

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ISDN provides an ideal service to connect remote 

 

LANs. To be effective, the connecting bandwidth 

 

needed is at least 64 Kbps to achieve a realistic 

 

throughput. Slower speed links can be used but 

 

usually only when usage is low and infrequent, or if 

 

higher speed circuits cannot be provided.

 

Leased digital point-to-point circuits 

 

can 

 

still 

 

be 

 

cost 

 

effective if usage spans many hours per day. 

 

However as ISDN tariffs reduce, this balance also 

 

changes. ISDN can be used to provide effective 

 

backup of these point-to-point WAN circuits in two 

 

ways.

■

 

Firstly, if the point-to-point circuit fails, an ISDN 

 

channel can be dialled-up automatically and quickly, 

 

to provide an alternative path to the remote unit.

■

 

Secondly, if the leased circuit becomes heavily loaded 

 

due to peaks in the traffic between remote bridges or 

 

routers, additional bandwidth can be automatically 

 

dialled-up to supplement the bandwidth of the 

 

leased circuit. The interconnected bridges would then 

 

treat the leased line and ISDN channel as parallel links, 

 

sharing the load across the two.

 

 

Before you install your OfficeConnect Remote, check 

 

the contents of the box against the pack contents 

 

checklist below. If any of the items have been 

 

damaged in transit or are missing, then contact the 

 

3Com dealer from whom the equipment was 

 

purchased.

■

 

1 x OfficeConnect Remote unit.

■

 

1 x power adapter fitted with an appropriate plug for 

 

your national power supply.

■

 

1 x 1.5 meter RJ45 to RJ45 male plug ISDN 2 

 

connecting cable.

■

 

1 x 1.5 meter DB9 to DB9 serial manager port cable.

■

 

1 x British Telecom to RJ11 convertor (UK models of 

 

OfficeConnect Remote 520 and 530 only).

■

 

1 x OfficeConnect Remote 

 

.

■

 

1 x OfficeConnect Remote 

 

 guide.

■

 

1 x Warranty Registration Card.

 

It is important that you save the unit’s box and 

 

protective packing material in case you need to 

 

store, or transport it in the future.

Rc.bk : RC01.FRM  Page 4  Thursday, July 10, 1997  9:53 AM