Instruction/ maintenance manual of the product DDM + H2TU-C ADTRAN
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JOB A ID 61222003L2-22A 0104 DDM+ H2TU-C CLEI: T1L3X5BA_ _ ST A TUS LEDs S TAT U S ● RED Alarm on the H2TU-C loop , H2R loop , DSX or DS1 interface. ✷ FLASHING Signal Quality of 0 or N o Sync on the loop . ● AMBER Loopbacks active. ✷ FLASHING In-band loopbacks armed.
INDICA TIONS AND PROBABLE CAUSES F ront P anel or Circuit Parameters I ndicate Abnormal Operation Connect a terminal or PC to the RS-232 (DB-9) craft interface located on the faceplate. The terminal must be VT100 or compatible and set for 1.2 to 19.2 kbps, 8 data bits, no parity , 1 stop bit, and no flow contr ol.
An important point after buying a device ADTRAN DDM + H2TU-C (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought ADTRAN DDM + H2TU-C yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data ADTRAN DDM + H2TU-C - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, ADTRAN DDM + H2TU-C you will learn all the available features of the product, as well as information on its operation. The information that you get ADTRAN DDM + H2TU-C will certainly help you make a decision on the purchase.
If you already are a holder of ADTRAN DDM + H2TU-C, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime ADTRAN DDM + H2TU-C.
However, one of the most important roles played by the user manual is to help in solving problems with ADTRAN DDM + H2TU-C. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device ADTRAN DDM + H2TU-C along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
