Instruction/ maintenance manual of the product 7511 Paradyne
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TM 1 751 1-A2-GN10-10 January 1999 Model 751 1 Dual DSU Startup Instructions Document Number 751 1-A2-GN10-10 January 1999 Pr oduct Documentation on the W orld W ide W eb We provide complete product documentation online. This lets you search the documentation for specific topics and print only what you need, reducing the waste of surplus printing.
2 751 1-A2-GN10-10 January 1999 Cables Y ou May Need to Order Y ou will need cables to connect your Network Interface Module (NIM) to the network and your 751 1 DSUs to DTEs. For further information refer to the documentation shipped with your NIM, and Appendix A, Cables and Pin Assignments, in the User ’s Guide.
3 751 1-A2-GN10-10 January 1999 S1 97-15396 1 2 3 4 5 6 7 8 ON 1 2 3 4 5 6 7 8 ON 1 2 3 4 5 6 7 8 ON 1 2 3 4 5 6 7 8 ON 1 2 3 4 5 6 7 8 ON S2 S3 S4 S5 Figure 1.
4 751 1-A2-GN10-10 January 1999 T able 1. Configuration Options (2 of 5) Switch Options and Usage Default in Bold TX Timing Source S1-2 & S1-3 (DSU A) S3-2 & S3-3 (DSU B) S1 S2 S3 S4 DSU A DSU B ON ON ON ON The timing source for the DSU. Off Off DDS For DDS, both switches must be Off.
5 751 1-A2-GN10-10 January 1999 T able 1. Configuration Options (3 of 5) Switch Options and Usage Default in Bold 64CC Data Scrambler S1-6 (DSU A) S3-6 (DSU B) S1 S2 S3 S4 DSU A DSU B ON ON ON ON Determines whether the DSU scrambles data to minimize the possibility of the remote DSU falsely recognizing a loopback command.
6 751 1-A2-GN10-10 January 1999 T able 1. Configuration Options (4 of 5) Switch Options and Usage Default in Bold CTS S2-1 & S2-2 (DSU A) S4-1 & S4-2 (DSU B) S1 S2 S3 S4 DSU A DSU B ON ON ON ON Determines the operation of interchange circuit CT106, Clear to Send (CTS).
7 751 1-A2-GN10-10 January 1999 T able 1. Configuration Options (5 of 5) Switch Options and Usage Default in Bold DSR S2-5 (DSU A) S4-5 (DSU B) S1 S2 S3 S4 DSU A DSU B ON ON ON ON Determines the operation of interchange circuit CT107, Data Set Ready (DSR).
8 751 1-A2-GN10-10 January 1999 Installing the Rear Connector Plate Procedur e T o install the rear connector plate: 1. At the rear of the carrier , place the tab on the connector plate in its slot in the carrier ’s backplane. The connector plate must use the same slot position intended for the DSU card.
9 751 1-A2-GN10-10 January 1999 Installing the DSU Card Procedur e T o install the Model 751 1 Dual DSU: 1. Using a Phillips screwdriver , loosen the screw holding the circuit pack lock. Rotate the lock to the open position and open the latch. Circuit Card Guides Circuit Pack Lock Latch Open (Unlocked) Closed (Locked) 495-14813 2.
10 751 1-A2-GN10-10 January 1999 495-14797 3. Slide the circuit card into the slot and press until the connectors are seated firmly into the back of the carrier . 4. If power is applied to the carrier: — All LEDs on the card light up momentarily . — The card completes its power-up self-test.
11 751 1-A2-GN10-10 January 1999 Installing the Network and DTE Cables Procedur e T o install the cables: 1. Note the location of the 751 1 Dual DSU circuit cards in the carrier (Slots 1–8, Slots 9–16, or all slots). 2. Connect network cables to the appropriate NIM and backplane connector according to the following table.
12 751 1-A2-GN10-10 January 1999 T r oubleshooting If the 751 1 Dual DSU does not turn on the OK LED after its power-up self-test, refer to the following table. Symptom Possible Cause Recommendations No power , or LEDs are not solidly lit. The power supply to the carrier has failed.
13 751 1-A2-GN10-10 January 1999 Symptom Recommendations Possible Cause Not receiving data; DSU is not responding. DDS line rate has changed Excessive BPVs Excessive loop loss 1. V erify that your subscriber loop is running at 56 kbps or 64 kbps CC.
14 751 1-A2-GN10-10 January 1999 4. Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous high voltage points or other risks. Refer all servicing to qualified service personnel. 5. General purpose cables are provided with this product.
15 751 1-A2-GN10-10 January 1999 Government Requir ements Certain governments require that instructions pertaining to connection to the telephone network be included in the installation and operation manual. Specific instructions are listed in the following sections.
16 751 1-A2-GN10-10 January 1999 customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations. Repairs to certified equipment should be coordinated by a representative designated by the supplier .
An important point after buying a device Paradyne 7511 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Paradyne 7511 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 Paradyne 7511 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Paradyne 7511 you will learn all the available features of the product, as well as information on its operation. The information that you get Paradyne 7511 will certainly help you make a decision on the purchase.
If you already are a holder of Paradyne 7511, 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 Paradyne 7511.
However, one of the most important roles played by the user manual is to help in solving problems with Paradyne 7511. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Paradyne 7511 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
