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PAIRGAIN TECHNOLOGIES

SECTION 150-612-100

Technical Practice

Revision 02

Engineering - PLANT

August 21, 1996

Page 1

AIR

AIN

™

ECHNOLOGIES

AIN

-2

™

EMOTE

NIT

MODEL HRU-612

List 1 PairGain #150-1218-01 CLEI Code: T1LIVC04AA

CONTENTS

PAGE

A. PRODUCT OVERVIEW

TECHNICAL ASSISTANCE

B. FUNCTIONAL DESCRIPTION

FUNCTIONAL OPERATION

FRONT PANEL

OPTIONS

10. LOOPBACKS

C. INSTALLATION AND TEST

11. INSTALLATION

12. TESTING

CAUTION

This product incorporates static sensitive

components. Proper electrostatic discharge

procedures must be followed.

Figure 1. HRU-612 List 1 Front Panel. The PairGain
HRU-612 is the remote side of a single pair repeaterless
T1 transmission system.

Содержание 150-1218-02

Страница 1: ...2 3 SPECIFICATIONS 3 4 CERTIFICATION 3 5 WARRANTY 4 6 TECHNICAL ASSISTANCE 4 B FUNCTIONAL DESCRIPTION 7 FUNCTIONAL OPERATION 4 8 FRONT PANEL 6 9 OPTIONS 7 10 LOOPBACKS 9 C INSTALLATION AND TEST 11 IN...

Страница 2: ...jacks for test access CPE current monitor test points Front panel VHDSL margin threshold indicator Lightning and power cross protection on VHDSL and DS1 interfaces 1568 kb s full duplex 2B1Q VHDSL Tra...

Страница 3: ...es 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 radi...

Страница 4: ...etin board system for obtaining current information on PairGain products product troubleshooting tips and aids accessing helpful utilities and for posting requests or questions This system is availabl...

Страница 5: ...as described in the previous paragraph Figures 7 13 illustrate the displays provided from the terminal port Information displayed shows the status of the HLU at the distant end of the VHDSL spans as w...

Страница 6: ...LB NET GREEN LED indicating the HRU is in a loopback state in which the signal from the NETwork is being looped back to the NETwork CI YELLOW LED indicating the HRU is in a loopback state in which the...

Страница 7: ...611 100 for more details The HRU also has three user options set by switches located at the back of the unit as shown in Figure 4 Each switch has two settings as follows refer to the block diagram in...

Страница 8: ...en the HRU does not function as the NID but is connected to en external NID It allows the external NID to set the appropriate NI level 15 Configures the T1 RCV LBO to 15 dB This sets the T1 output sig...

Страница 9: ...t time out period if enabled expires 10 04 When the HRU is in its AIS ENA smart jack metallic loop back state its T1 input LOS Code Frame monitoring circuits are connected to the unframed AIS pattern...

Страница 10: ...1 01 Upon receipt of the equipment visually inspect it for signs of damage If the equipment has been damaged in transit immediately report the extent of damage to the transportation company and to Pai...

Страница 11: ...al NID is under power and that the voltage across the HRU 612 s front panel 60 mA MON test points measures between 55 and 65 mv This indicates that the CPE current is between 55 65 mA Note that the ex...

Страница 12: ...ing to establish contact with each other ACQ1 Acquisition The HLU HRU multiplexers are trying to establish synchronization over each loop HES HDSL CRC Error At least 1 CRC error on the VHDSL Loop in t...

Страница 13: ...the HLU is set to receive and transmit at its DSX 1 interface Displayed during System Settings mode defined above LOSW Loss of Sync Word Indicates that the VHDSL loop has lost sync Causes a minor alar...

Страница 14: ...of band ESF data link code See Figure 5 NREM Network Remote Loopback Loopback at HRU remote towards network initiated by intelligent line repeater code HRU or HLU front panel push button or maintenan...

Страница 15: ...4 Hour ES Errored Seconds The number of 1 second intervals that contained at least 1 CRC error This value is a running total of the last 24 Hours VHDSL 24 Hour UAS Unavailable Seconds The number of se...

Страница 16: ...Section 150 612 100 Revision 02 Page 16 FIGURE 7 HRU 612 MAIN MENU Figure 8 HRU Status Display...

Страница 17: ...Section 150 612 100 Revision 02 Page 17 FIGURE 9 Set Clock Menu Figure 10 System Settings Menu...

Страница 18: ...Section 150 612 100 Revision 02 Page 18 Figure 11 Performance Data Figure 12 Performance Data History...

Страница 19: ...Section 150 612 100 Revision 02 Page 19 Figure 13 HLU Alarm History...

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