Instruction/ maintenance manual of the product DSU/CSU ADTRAN
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1 61291006L2-5B Section 61291006L2, Issue 2 1. GENERAL This practice provides installation and maintenance procedures for the ADTRAN D4 Total Reach Office Channel Unit Dataport (TROCU DP) Preferred Option. The unit is illustrated in Figure 1 . Document Revision History Issue 2 of this document revises the Deployment Guidelines subsection.
2 61291006L2-5B Section 61291006L2, Issue 2 2. OPTIONS Select the appropriate OPTIONS and RATE using SW1 and faceplate switches as illustrated in Figure 3 and Figure 4 . CAUTION Select only one option rate. Rate is selected on faceplate switch SW2 by pushing one or two switches to the right toward the inscribed rates.
3 61291006L2-5B Section 61291006L2, Issue 2 When inserted into a powered up backplane the TROCU DP and TRDDS-R will synchronize within 30 to 90 seconds.
4 61291006L2-5B Section 61291006L2, Issue 2 As an enhancement to automated testing capability, TRDDS eliminates false error indication when invoking NIE, CSU, or DSU loopbacks immediately following release of OCU loopback.
5 61291006L2-5B Section 61291006L2, Issue 2 and manual switch settings by pressing the momentary Alternate Provisioning (AP) switch located on the front panel. If the channel unit is removed from the system, the unit retains previous provisioning information in nonvolatile Random Access Memory (RAM).
6 61291006L2-5B Section 61291006L2, Issue 2 7. WARRANTY AND CUSTOMER SERVICE ADTRAN will replace or repair this product within 10 years from the date of shipment if it does not meet its published spec.
An important point after buying a device ADTRAN DSU/CSU (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 DSU/CSU 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 DSU/CSU - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, ADTRAN DSU/CSU you will learn all the available features of the product, as well as information on its operation. The information that you get ADTRAN DSU/CSU will certainly help you make a decision on the purchase.
If you already are a holder of ADTRAN DSU/CSU, 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 DSU/CSU.
However, one of the most important roles played by the user manual is to help in solving problems with ADTRAN DSU/CSU. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device ADTRAN DSU/CSU 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
