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 14

7511-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. Special cables, which

may be required by the regulatory inspection authority for the installation site,
are the responsibility of the customer.

6. When installed in the final configuration, the product must comply with the

applicable Safety Standards and regulatory requirements of the country in
which it is installed. If necessary, consult with the appropriate regulatory
agencies and inspection authorities to ensure compliance.

7. A rare phenomenon can create a voltage potential between the earth

grounds of two or more buildings. If products installed in separate buildings
are interconnected, the voltage potential may cause a hazardous condition.
Consult a qualified electrical consultant to determine whether or not this
phenomenon exists and, if necessary, implement corrective action prior to
interconnecting the products.

8. In addition, if the equipment is to be used with telecommunications circuits,

take the following precautions:

— Never install telephone wiring during a lightning storm.
— Never install telephone jacks in wet locations unless the jack is 

specifically designed for wet locations.

— Never touch uninsulated telephone wires or terminals unless the 

telephone line has been disconnected at the network interface.

— Use caution when installing or modifying telephone lines.
— Avoid using a telephone (other than a cordless type) during an electrical 

storm. There may be a remote risk of electric shock from lightning.

— Do not use the telephone to report a gas leak in the vicinity of the leak.

Notices

!

WARNING:

This equipment has been tested and found to comply with the limits for a Class
A digital device, pursuant to Part 15 of the FCC rules. These limits are designed
to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in a residential area is likely
to cause harmful interference in which case the user will be required to correct
the interference at his own expense.

The authority to operate this equipment is conditioned by the requirements that
no modifications will be made to the equipment unless the changes or
modifications are expressly approved by Paradyne Corporation.

!

WARNING:

To Users of Digital Apparatus in Canada:

This Class A digital apparatus meets all requirements of the Canadian
interference-causing equipment regulations.

Cet appareil numérique de la classe A respecte toutes les exigences du
règlement sur le matérial brouilleur du Canada.

Summary of Contents for Dual DSU 7511

Page 1: ...able at www paradyne com Select Service Support Technical Manuals Subrate Digital Access Devices Select the following document 7511 A2 GB20 Model 7511 Dual DSU User s Guide To request a paper copy of...

Page 2: ...f the proper static control precautions contact your nearest sales or service representative Configuring the DSUs Procedure To configure the Model 7511 Dual DSU 1 Review Table 1 to determine the prope...

Page 3: ...S2 S3 S4 S5 Figure 1 Model 7511 Switch Locations Table 1 Configuration Options 1 of 5 Switch Options and Usage Default in Bold Line Rate S1 1 DSU A S3 1 DSU B S1 S2 S3 S4 DSU A DSU B ON ON ON ON DDS o...

Page 4: ...ans timing is provided by the DTE Ten Minute Test Abort Timer S1 4 DSU A S3 4 DSU B S1 S2 S3 S4 DSU A DSU B ON ON ON ON Determines whether user initiated tests automatically terminate after 10 minutes...

Page 5: ...ction S1 7 DSU A S3 7 DSU B S1 S2 S3 S4 DSU A DSU B ON ON ON ON Determines whether the DSU responds to V 54 Loop Up and Loop Down sequences from the remote DSU Off Disable V 54 loop sequences are igno...

Page 6: ...s ON ON Forced On CTS is forced on after a successful self test RTS S2 3 DSU A S4 3 DSU B S1 S2 S3 S4 DSU A DSU B ON ON ON ON Determines the operation of interchange circuit CT105 Request to Send RTS...

Page 7: ...remote loopback test ON Disable A 511 pattern is not generated External test equipment is required to perform a Bit Error Rate test CT141 S5 1 DSU A S5 3 DSU B S5 DSU A DSU B ON Determines whether a l...

Page 8: ...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 2 Loosely fasten th...

Page 9: ...ing 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 At the front of the carrier hold t...

Page 10: ...e carrier All LEDs on the card light up momentarily The card completes its power up self test The Alarm and OK LEDs are turned off or on depending on the test results 5 Press the faceplate latch to se...

Page 11: ...e for DSU As on 7511 cards in Slots 9 16 The NIM on the right side for DSU As on 7511 cards in Slots 1 8 Connector P22 for DSU Bs on 7511 cards in Slots 9 16 Connector P21 for DSU Bs of 7511 cards in...

Page 12: ...service representative An Alarm LED is on DDS Mode The subscriber loop rate is not matched to the 7511 s configured rate No DDS Signal Verify the subscriber loop rate If the NS LED is lit Verify that...

Page 13: ...ation option verify that it is enabled An LED is not lit LED is burned out While the DSUs are not in use cycle power to the card by pulling it slightly out of the carrier then replacing it If the LED...

Page 14: ...locations Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface Use caution when installing or modifying telephone lines Avoid u...

Page 15: ...the user Should you experience difficulty with this equipment refer to Warranty Sales and Service Information For Digital Data Service DDS installations inform the local telephone company of the appr...

Page 16: ...EN assigned to each terminal device provides an indication of the maximum number of terminals allowed to be connected to a telephone interface The termination on an interface may consist of any combin...

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