附录

        附录一  SL200D智能用户线测试仪经验数据记录表

   用户可将实际使用SL200D智能用户线测试仪中获得的一些经验数据、
现象及结果记录在此表格中，以帮助更好地使用该设备。

      附录二  SL200D智能用户线测试仪产品履历表

产品名称: 智能用户线测试仪
产品型号: SL200D               产品编号: ___________________
销售日期: ___________________ 本批销售总套数: _____________
经 销 商: ___________________
电 话: ___________________     地 址: ___________________
传 真: ___________________     邮 编: ___________________
联 系 人: ___________________

      附录三  SL200D智能用户线测试仪图示照片

                   附图3-1 测试仪正面照片

              附图 3-2  测试电缆遥控器照片

      附图 3-3  SL200D智能用户线测试仪前面板照片

     附图 3-4   SL200D智能用户线测试仪后面板照片

     附录四  SL200D智能用户线测试仪英文简介

  SL200D Intelligent Subscriber Line Test Board

    The design of SL200D is based on the modern electronic measuring technology, digital signal processing technology, microprocessor control technology, digitized voice technology, etc. SL200D integrates the most functions of exchange subscriber line testing unit (TU) and traditional manual subscriber line testing board. Few training of operator!One- person operation and remote operation are available. It works by plugging test core into line arrangement shelf directly and the fault inside and outside the shelf can be distinguished. Exchange types are not concerned. Ten items data of subscriber line can be obtained automatically in about 5 seconds and the fault type, such as line broken, line touching, touching negative voltage, touching ground, insufficient insulation, etc., can be judged automatically. The fault type is displayed in LCD and played via voice
simultaneously. The further functions, such as listening to dial tone, supplying 48V supply, ringing, talking, DTMF checking, loop resistance testing, data storage, are also available. SL200Ds are widely used in the routine maintenance and telephone installation in various exchange testing rooms.


Functions:

● Can be operated by only one person.
● Test by plugging test core into line arrangement shelf directly.Exchange types not concerned.
● Two operation ways: panel keyboard and remote keyboard.
● External Line (it means the subscriber line outside the shelf): The data of DC voltage, AC voltage, resistance and capacitance for A-B, A-Ground, B-Ground (total 10 items) can be obtained in 5 seconds and the fault types can be recognized automatically. The fault types are: line normal, line broken, line touching, touching ground, touching negative voltage, insufficient insulation. The fault type is displayed in LCD and played out via speaker simultaneously.
● Internal Line (it means the subscriber line inside the shelf): The dial tone can be played out by the attached speaker and the operator can judge if the internal line is normal according to what the speaker is playing.
● Line Check 1: SL200D sends voice message to the subscriber line. And so the outside operator can recognize the line pair by connecting the phone to the line pair and listening to the phone.
● Line Check 2: Be capable of testing the loop resistance of lines continuously. The results are displayed in LCD and played out via the speaker continuously, respectively.
● Talk: Be capable of supplying 48V supply and ringing. When off-hook, the operator can talk to the subscriber.
● DTMF: Ringing. When off-hook, talk to the subscriber and ask him/her to press the dial keys. The LCD displays the corresponding key number.
● Data Inquire: 50 record items of testing can be stored in scroll way for inquiry.
● Last Record/Next Record: To inquire the last record/next record.
● Exit: Exit to the initial state.
● Simple operation. When test core is plugged into the line arrangement shelf, the operator can press the remote keyboard attached the core, then the test result can be heard directly without moving frequently.
● LCD prompts for operation.
● Fast test speed. Subscriber line testing and result recognizing can be finished in 6 seconds.
● Be capable of testing the subscriber line for which a phone number has not been assigned.
● Accuracy > 98%.


Line Fault Type Explanation:

Line Normal: The subscriber line pair is normal. It means that all the 10 data items of the line
pair, including all of the terminal devices attached to this line pair, are correct.Generally, the terminal devices can work normally.

Line Broken: The subscriber line pair is broken. It means that one or two lines of the line pair are broken. So the terminal device can not work at all.

Line Touching: The two lines of the subscriber line pair touch each other. Generally, the A-B resistance is roughly from 0 to 2000 ohm. One of the cases is that the line pair is normal, but the phone is off-hook.

Touching Ground: One or two lines of the subscriber line pair fall to the ground. Generally, the resistance of A-Ground or B-Ground is roughly from 0 to 200k ohm. This case often happens in rainy days and some noise can be heard during talking.

Touching Negative Voltage: One of two lines of the subscriber line pair touch with another line pair. It is also called touching foreign voltages of excessive DC voltage in some different exchanges.

Insufficient Insulation:  The insulation resistance between A-B is not good enough to ensure the normal talking. The A-B resistance is generally from 2k to 200k ohm. This case often happens in rainy days and some noise can be heard during talking.