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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of 3Com 7700, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
What is an instruction?
The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of 3Com 7700 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of 3Com 7700. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of 3Com 7700 should contain:
- informations concerning technical data of 3Com 7700
- name of the manufacturer and a year of construction of the 3Com 7700 item
- rules of operation, control and maintenance of the 3Com 7700 item
- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of 3Com 7700 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of 3Com 7700, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the 3Com service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of 3Com 7700.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the 3Com 7700 item, and its use of respective accessory, as well as information concerning all the functions and facilities.
After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.
Table of contents for the manual
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Page 1
1 • Chassis-based design for enterprise building core and edge • On-board switching for superior performance • Resilient configuration for highest availability 3Com ® Switch 7700 Family Key Benefits Scalability Scales to 288 Fast Ethernet, or 120 Giga bit Ethernet ports. Ad d 10 Gbps (10Giga bit Ethernet) connections for s witch-to-switch li[...]
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Page 2
3COM ® SWITCH 7700 F AMIL Y DA T A SHEET 2 The 3Com ® Switch 7700 modular LA N s wi tch famil y deliver s high-performance, mul t il ayer, 10 Giga bit, Giga bit, and Fast Ethernet switching and routing in a scala ble, fl ex i b l e , m o d u la r chassis. Three chassis configurations are offer ed: • High-a vaila bility 8-slot redundant chassis,[...]
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Page 3
3 3COM ® SWITCH 7700 F AMIL Y DA T A SHEET Sample configurations supported by the Switch 7700 Family Floor 1 2 3 4 3Com ® SuperStack ® 3 Switch 4400 stacks XRN Distributed Fabr ic 3Com Switch 4060 3Com Switch 7700 Server farm SuperStack 3 Switch 4924 XRN Distributed Fabric 3Com 1000BASE-T Server NICs 3Com Switch 7700 in the core of an enterprise[...]
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Page 4
3COM ® SWITCH 7700 F AMIL Y DA T A SHEET 4 PERFORMANCE Backplane capacity 8- and 7-slot chassis: 96 Gbps; 4-slot: 48 Gbps Maximum bandwidth 8- and 7-slot chassis: 240 Gbps; 4-slot: 120 Gbps Maximum throughput 8- and 7-slot chassis: 177 Mpps; 4-slot: 95 Mpps LA YER 2 SWITCHING MAC Address 32K MAC addresses 10K Static MAC addresses Modules forwar di[...]
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Page 5
CONVERGENCE Priority Queues Eight hardwar e queues per port T raffic Prioritization Flow-based QoS profiles Ingress and egr ess Remarking of packets based on priority: • Auto classification of NBX telephones • Selectable prioritization • DSCP (Diffserv Code Point) • T ype of Service (T oS) • IEEE 802.1p Class of Service (CoS) • IP prece[...]
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Page 6
MANAGEMENT , continued Bandwidth Management Flow based bandwidth management Flows identified thr ough Access Contr ol Lists (ACLs) Minimum and maximum thresholds: • 64kbit/s increments • 128 traffic classes per port • 512 flows per class Queue Handling Random Early Detect/Discard (RED) Queuing algorithms Strict Priority Queuing WRR (Weighted [...]
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Page 7
7 3COM ® SWITCH 7700 F AMIL Y DA T A SHEET Specifications All information in this section is r elev ant to al l m embe rs of t he 3 Com Swi tch 770 0 famil y , unless stated other- wise. Capacities and Performance Switch 7700 4-slot: One switch f a bric, three optional pa yload slots Backplane: 48 Gbps, max Bandwidth: 120 Gbps , max Throughput: 88[...]
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Page 8
3Com Corporation, Corporate Headquarters, 350 Campus Drive, Marlbor ough, MA 01752-3064 T o learn more about 3Com solutions, visit www .3com.com. 3Com is publicly traded on NASDAQ under the symbol COMS. Cop yright © 2004 3Com Corporation. All rights r eserv ed. 3Com, the 3Com lo g o , NBX, and Su perStack are registered trademar ks, Exer cise Choi[...]