Instruction/ maintenance manual of the product D4-OCU ADTRAN
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1 Section 61107005L2-5, Issue 3 61107.005L2-5C C A U T I O N ! SUBJECT TO ELECTROSTATIC DAMAGE OR DECREASE IN RELIABILITY. HANDLING PRECAUTIONS REQUIRED. PRACTICES Section 61107005L2-5 Issue 3, June 1996 CLEI Code # D4DA740 _ _ _ D4-OCU DP (ETR) ALL-RA TE OFFICE CHANNEL UNIT DA T APORT WITH EXTENDED TRANSMIT RANGE INST ALLA TION/MAINTENANCE 1.
2 Section 61107005L2-5, Issue 3 61107.005L2-5C In the DDS system, an OCU DP located at an end office interfaces the customer to the T carrier system. A 4-wire loop is terminated at the customer premises by a data service unit (DSU) or a channel service unit (CSU).
3 Section 61107005L2-5, Issue 3 61107.005L2-5C Figure 3. SW1 Function O n .... Activates error correction O f f .... Deactivates error correction O n .... Selects D4 bank type. O f f .... Unable to select D4 bank type. O n .... Selects SLC-96 bank, Mode I or III.
4 Section 61107005L2-5, Issue 3 61107.005L2-5C 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 +5V IN CLK TNEN TDATA RSAB RCLK RWD RSQ -48V R1 R FRM GND -12V GND +12V GND TWD TSP TSQ RNPCM RFA TDCLK RSP RNDIS -48R T1 IZ T Figure 4.
An important point after buying a device ADTRAN D4-OCU (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 D4-OCU 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 D4-OCU - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, ADTRAN D4-OCU you will learn all the available features of the product, as well as information on its operation. The information that you get ADTRAN D4-OCU will certainly help you make a decision on the purchase.
If you already are a holder of ADTRAN D4-OCU, 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 D4-OCU.
However, one of the most important roles played by the user manual is to help in solving problems with ADTRAN D4-OCU. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device ADTRAN D4-OCU 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
