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Section 150-612-100
Revision 02

Page 10

10.09

All of the HRU loopbacks towards the 
network (NREM & SMJK) are metallic/logic

(AIS/ENA) or metallic only (AIS/DIS) except for
the TLOS initiated loopback, which is logic only.
The SMJK identifying label indicates that the
loopback was initiated by the 3 in 5 in band
command.  NREM is used to indicate that the
metallic loopback was initiated by other than the
3 in 5 command (3 in 7, 16 bit addressable
repeater commands or front panel push-button).

 C. INSTALLATION AND TEST

11.  INSTALLATION

11.01

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 PairGain.

11.02

The HRU-612, List 1 is designed to mount in
PairGain’s HRE-421 (double width, single

mount), HRE-422 (double width, double mount),
HRE-424 (double width, 4 unit wall mount), HRE-420
(single width, single mount) or HRE-425 (10 unit wall
or rack mount) Remote indoor Enclosures.  For
outdoor applications, the HRE-423 (3 unit) and HRE-
450 (single width, single mount) enclosures are
available.  The HRU is also compatible with industry
standard 400 type multi-mount shelves.  The HRU’s
pin-outs are shown in Figure 6.

Figure 6.  HRU-612 Pin-outs.

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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