3Com SuperStack II 3C16665A Посібник користувача - Сторінка 3

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NTRODUCTION

The SuperStack ™ II Hub 10 6 Port Fiber (3C16665A) has 6 dedicated

optical fiber ports (ST bayonet type) on the front panel and an AUI port

on the rear panel. The rear panel also has a slot for a 3Com Transceiver

Module or Bridge MicroModule; if fitted the Transceiver Module will

operate in addition to the AUI port. A range of different media

Transceiver Modules is available from 3Com (see

Boards "

The Hub 10 6 Port Fiber can be stand-alone or linked with other

SuperStack II Hub 10, LinkBuilder FMS II, FMS, 10BT or 10BTi units to

form a stack of units of different media. Each stack is the equivalent to a

single IEEE 802.3 repeater, so stacking units gives you the benefit of a

higher port count.

The Hub 10 6 Port Fiber is suited for office use where it can be

wall-mounted, rack-mounted, or free standing. Alternatively, the unit can

be rack-mounted in a wiring closet or equipment room. A mounting kit

is supplied.

The Hub 10 6 Port Fiber can be powered either from the AC mains

supply, or through an optional 3Com Redundant Power System

(3C565047) to provide a more reliable supply. Contact your supplier for

details.

Repeater Functions

The Hub10 6 Port Fiber has been designed to conform to the IEEE 802.3

standard for Local Area Networks, and provides all the standard

functions of an 802.3 repeater, including:

Signal retiming

Preamble regeneration

Fragment extension

Automatic partition/reconnection

Management

A SuperStack II Hub 10 Management Module (3C16630A) or Advanced

RMON Module (3C16632) can be fitted to the Hub 10 6 Port Fiber to

provide f ull SNMP management , including statistics, resilient links and

security features . Only one Management Module or Advanced RMON

Module is required for each stack. Refer to the guides accompanying the

module for details on how to manage an Hub 10 unit or stack.

Resilience and Security

H ub 10 Management Module (3C16630A) and Hub 10 Advanced RMON

Module (3C16632) offer resilience and security f eatures.

Up to 16 resilient link pairs can be configured via management software.

To avoid the creation of loops during power-up, Hub 10 units provide a

OW TO

Numbered elements in this diagram refer to numbered sections in the text.

These numbers, in bold, are used as reference

" Products and Bulletin

SE THE

Disable On Boot switch. If this switch is set to disable, all fiber ports on

the unit will be disabled during power-up until they are correctly

configured and enabled by management software. This is only necessary

on units which have ports assigned as standby. Standby ports in resilient

link pairs can only be configured on SuperStack II Hub 10 and

LinkBuilder FMS II units.

Security features are described in the manual which comes with your

Hub 10 Management Module.

By disabling ports on boot up and enabling them with management

software, you provide extra security for the unit.

During the power up sequence, the main ports (on the front

panel) will be disabled, BUT the AUI and Transceiver Module

ports will be enabled for periods of up to 1 second. During this

brief moment, the AUI and Transceiver Module ports will NOT

be secure.

Network Connections

The Hub 10 Fiber Optic can use the following types of optical cabling:

50/125 Multimode graded index

62.5/125 Multimode graded index

85/125 Multimode graded index

100/140 Multimode graded index

Terminating optical fiber cable is a job that requires a high level

of proficiency and is best carried out using expensive equipment

not normally required for maintaining most Local Area

Networks. We therefore recommend that all terminations of

optical fiber cable should be carried out by a reputable cable

installer as poor cable terminations can reduce the light levels,

rendering your installation inoperable.

You can connect any 802.3 transceiver to the unit using an AUI cable

connected to the AUI port on the rear panel. Also, you can fit one of the

3Com Transceiver Modules into the slot on the rear panel (see

and Bulletin Boards "

Important

To manage this hub, you may n eed a new v ersion of the agent

software installed on y our Management Module. See

Management "

for details.

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" Stack