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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of JBM electronic C20 through C21, 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 JBM electronic C20 through C21 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 JBM electronic C20 through C21. 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 JBM electronic C20 through C21 should contain:
- informations concerning technical data of JBM electronic C20 through C21
- name of the manufacturer and a year of construction of the JBM electronic C20 through C21 item
- rules of operation, control and maintenance of the JBM electronic C20 through C21 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 JBM electronic C20 through C21 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 JBM electronic C20 through C21, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the JBM electronic 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 JBM electronic C20 through C21.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the JBM electronic C20 through C21 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
Cables - C20 through C21[...]
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Page 2
Cables for Gateway 20 through 21 PAGE 1 © JBM Electronics Co. 1-800-489-7781 www.jbmelectronics.com File Name: cable_c20_c21.doc Revision Date: March 23, 2006 Revision Level: 1.0 FCC Notice Warning: This equipment generates, uses, and can radiate radio frequency energy; and if not installed and used in a ccordance with the in struction manual, may[...]
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Page 3
Cables for Gateway 20 through 21 PAGE 2 © JBM Electronics Co. 1-800-489-7781 www.jbmelectronics.com C20 –C21 Port Cable Description Cable Order Number Table Serial 9F to 9M DCE Cable 6foot C/9SF-9M-DCE-6’ Pg. 3 9F to 25M DCE Cable 6foot C/9SF-25M-DCE-6’ Pg. 3 9F to 9F Straight Gender Changer C/9FF-XGENDER Pg. 4 DE-9M RS232 DTE async (Comport[...]
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Page 4
Cables for Gateway 20 through 21 PAGE 3 © JBM Electronics Co. 1-800-489-7781 www.jbmelectronics.com 9F to 9M/F (DCE) This table lists the required RS-232 wiring required to provide a DCE interface for a Gateway Comm. Port. The pins should be connected from one connector to the other using the transpositions indicated. This cable is used for modem [...]
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Page 5
Cables for Gateway 20 through 21 PAGE 4 © JBM Electronics Co. 1-800-489-7781 www.jbmelectronics.com 25F to 25F Gender Changer This is used to change a 9-pi n male end connector to female. Units Supported • C20 JBM Electronics Part Number: C/9FF-XGENDER 25F to 25F Gender Changer This is used to change a 25-pin male end connector to female. Units [...]
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Page 6
Cables for Gateway 20 through 21 PAGE 5 © JBM Electronics Co. 1-800-489-7781 www.jbmelectronics.com RJ-45 Straight This table lists the Ethernet pins used in the Ethernet Port ETH0. For a straight-wired connection the pins should be connected from one connector to the other without transpositions or ot her wiring changes. Units Supported • C20 ?[...]
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Page 7
Cables for Gateway 20 through 21 PAGE 6 © JBM Electronics Co. 1-800-489-7781 www.jbmelectronics.com RJ-11 Straight This table lists the required pins used in the Modem cable used to connect the Gateways to an asynchronous modem. Pins should be c onnected from one RJ-11 connector to the other without transpositions or other wiring changes. Units Su[...]