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PairGain HIGAIN HLU-232, Manual

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PairGain HIGAIN HLU-232 Manual Download Page 57

Section 150-232-100

Revision 01

Page 57

TABLE 17.  HLU-232 A1LB TEST PROCEDURES (CONTINUED)

Step

Action

5

Using the following codes, a network tester can activate loopbacks NLOC or NREM or SMJK (if enabled)
shown in Figure 19.  A customer tester can activate loopbacks CLOC or CREM.

ADDRESSABLE 1 (A1LB) REPEATER LOOPBACK COMMANDS

ARMING or NI LPBK (in-band)

Arming code

11000 11000 ...

ARMING or NI LPBK
(ESF Data Link)

Arming code

1111(F)*1111(F)0100(4)1000(8)

IR LPDN or DISARM (in-band)

Disarming code

11100 11100 ...

DISARM (ESF Data Link)

Disarming code

1111(F)1111(F)0010(2)0100(4)

IOR LPBK (NLOC & CREM 231
errors)

HLU Loop up

1101(D)0011(3)1101(D)0011(3)

ILR-1 LPBK
(NDU1 & CDU1 10 bit errors)

DOUBLER-1 Loop up

1100(C)0111(7)0100(4)0001(1)

ILR-20 LPBK
(NDU2 & CDU2 200 bit errors)

DOUBLER-2 Loop up

1100(C)0111(7)0101(5)0100(4)

ILR-2 LPBK
(NREM & CLOC 20 bit errors)

HRU Loop up

1100(C)0111(7)0100(4)0010(2)

IR LPDN

Loop down (HLU or HRU)

1001(9)0011(3)1001(9)0011(3)

IR QUERY LPBK

Query loopback

1101(D)0101(5)1101(D)0101(5)

IR ALTERNATE QUERY LPBK

Alternate Query loopback

1101(D)0101(5)1110(E)1010(A)

TIME-OUT OVERRIDE

Loopback Time-out Override

1101(D)0101(5)1101(D)0110(6)

FAR END NI ACTIVATE

Unblock AIS & pass 2 in 5

1101(C)0101(5)0101(5)0100(4)

IOR POWER DOWN (HLU)

Removes HDSL line power

0110(6)0111(7)0110(6)0111(7)

Note: The left most bit arrives first in all sequences.  The detection algorithm functions reliably with a
random 10

-3

 Bit Error Ratio (BER) on the facility.  The IOR POWER DOWN code must remain present for

the duration of the power down mode.  When this code is removed, the HiGain system returns to its
normal unlooped and unarmed state. *This is the HEX number for the 16-bit binary code.

6

After testing is complete, send the universal loopdown [IR (Intelligent Repeater) LPDN] code if the system
is to loopdown but remain ARMED.  Send the disarm code 11100 if all the equipment is to be looped
down, disarmed and returned to normal operation.  Note that the ARMED mode has an automatic time-out
of 120 minutes.

7

All of the above loopbacks can also be initiated from the front panel of the HLU-232 List 1D with the MODE
and SEL buttons (Section C Paragraph 3.10).

Summary of Contents for HIGAIN HLU-232

Page 1: ...MPTION 22 3 LOOPBACK OPERATION 23 4 TESTING 25 5 SYSTEM MAINTENANCE MENU SCREENS 39 C APPLICATIONS USING HIGAIN DOUBLERS 49 1 GENERAL 49 2 POWER CONSUMPTION 49 3 LOOPBACK OPERATION 51 4 TESTING 53 5 S...

Page 2: ...em uses HDSL transmission technology as recommended by Bellcore TA TSY 001210 The HiGain system complies with TR TSY 000063 Network Equipment Building System NEBS Generic Equipment requirements and TR...

Page 3: ...per kft 26 0 4mm 3 88 83 24 0 51mm 2 84 52 22 0 61mm 2 18 32 19 0 91mm 1 54 16 2 04 The HiGain system operates with any number of other T1 POTS Digital Data Service DDS or other HiGain systems sharing...

Page 4: ...Revision 01 Page 4 XMT XMT REC REC PROTECT PRIMARY PROTECT PRIMARY HIGAIN 1 x 1 PROTECTION SWITCH HLU 232 HLU 232 HRU 412 HRU 412 HRE 422 HSA 232 PROTECT PRIMARY CONTROL CONTROL protsw Figure 2 HiGain...

Page 5: ...s data streams The data streams contain HDSL frames that are nominally 4704 bits 6 milliseconds in length The HDSL frames contain a 14 bit Frame Sync Word FSW 6 bit Cyclic Redundancy Check CRC 21 bit...

Page 6: ...V 1 R C V 2 R IN G 1 R IN G 2 TIP2 SPAN SPAN XM T D S X 1 BRG BRG MUX DEMUX PRE EQUALIZER SELECT T1 FRAMER M ODE SEL 130V to 200V POW ER SUPPLY ISOLATED 12 14 ALR M 21 RTERM 19 17 Figure 3 HLU 232 Lis...

Page 7: ...y converts the 48V battery to a 130V dc no doublers to 200V dc doublers feed that provides simplex power feed on the two HDSL line interfaces The line power supply can be turned on or off by the micro...

Page 8: ...1 input signal ALRM TLOS The DS1 input to the HRU whose TLOS switch option has been enabled is not present LOS ALRM H1 2 ES HDSL Loop 1 or Loop 2 has exceeded the 24 hour user selected Errored Seconds...

Page 9: ...NE for the ESAL system option See Section 8 for System Settings information The MAL1 2 alarm can be disabled by setting the margin alarm threshold to 0 A minor alarm can be retired by executing the Al...

Page 10: ...the ALRM message is still displayed 4 05 Pin 32 on the HSA 232 FUSEALARM Figure 5 is driven to 48 V and the front panel STATUS LED turns red whenever the on board fuse installed on the HLU 232 opens...

Page 11: ...lay returns to its normal mode The display also returns to its normal mode without installing any new changes if neither button is pressed for 30 seconds 5 04 All 14 user system options and 7 Protecti...

Page 12: ...margin on HDSL loop 1 MAL1 or loop 2 MAL2 drops below the selected threshold value Since the margin can never drop below 0 choosing 0 for the margin threshold disables the margin alarm function 5 11 T...

Page 13: ...reason mixed systems will respond differently in each direction for B8ZS inputs when in their AMI mode 5 15 The SELF TEST mode that occurs when both HDSL loops are not in sync has been enhanced to in...

Page 14: ...17 Activates closes the minor alarm relay contacts on pins 12 14 and flashes the red STATUS LED when 17 Errored Seconds ES 17 HDSL CRC errors on either HDSL loop or a total of 17 BPVs occur within a...

Page 15: ...minor alarm occurs SAIS ENA Causes the HRU to transmit the AIS signal towards the Customer Interface CI when in NREM or SMJK loopback DIS Causes the List 6 HRU to transmit the signal from the network...

Page 16: ...itching threshold can be set to one of the four values shown in Table 3 A BER bit error is defined as either an HDSL CRC or FEBE far end bit error in either of the two HDSL loops An HDSL CRC error occ...

Page 17: ...a lesser degree The single T1 input is connected to both T1 inputs of the two units HLU HRU at each end of the circuit At the HLU the input 100 ohm input impedance switches with the on line unit This...

Page 18: ...minute 1E 6 Sets the BER threshold to 10 6 47 CRC and or FEBE errors within 1 minute 1E 7 Sets the BER threshold to 10 7 4 7 CRC and or FEBE errors within 1 minute BER Measurement Interval BERI 5 Set...

Page 19: ...IS when using the Kentrox 220 T Term shelf This is required to resolve a conflict between the HLU alarm relay output and the Kentrox external equalizer output Both use the same pins 20 and 21 HLU 232...

Page 20: ...1 544 Mbps 200 bps DS1 Line Format AMI B8ZS or ZBTSI DS1 Frame Format SF ESF or unframed Maximum Power Consumption 18 Watts without Doubler 34 Watts with Doubler Maximum Heat Dissipation 7 Watts with...

Page 21: ...to PairGain for repair Any modifications of the unit by anyone other than an authorized PairGain representative voids the warranty 10 03 If a unit needs repair call PairGain for a Return Material Aut...

Page 22: ...or open faced natural convection cooled mountings is limited to 120 Watts sq ft per Section 4 2 3 of the NEBS standard TR NWT 000063 The footprint of a standard 13 slot 23 HLU 232 List 1D shelf is 7 0...

Page 23: ...on with the following additions Query loopback IOR Intelligent Office Repeater power down Three loopback time out choices Initiation from either end Repeater bit error signatures Alternate query loopb...

Page 24: ...tiates a MANUAL loopback session This session allows the user to SEL one of four HiGain system loopbacks The message MAN LPBK appears on the front panel display followed by the message NLO If the SEL...

Page 25: ...te power control timer 4 03 If trouble is encountered on the HLU 232 List 1D DSX 1 interface verify that the HLU 232 is properly seated in the HSA 232 adapter and the HSA 232 is properly seated in the...

Page 26: ...32 100 Revision 01 Page 26 Figure 6 HLU 232 non Doubler Loopback Configurations The most important of the HiGain family of loopback options is the Smart Jack loopback which emulates the functions of a...

Page 27: ...can be looped up from the remote location CREM by issuing the 6 in 7 in band loop up code at the HRU 412 DS1 input port 8 The HRU 412 can be looped up from the remote location CLOC by issuing the 5 i...

Page 28: ...ing the frame bit occur in the returned pattern 20 errors if ILR 2 were sent followed by Normal looped data Note that this error pattern will repeat every 20 seconds as long as the IOR loopback patter...

Page 29: ...5 1110 E 1010 A TIME OUT OVERRIDE Loopback Time out Override 1101 D 0101 5 1101 D 0110 6 FAR END NI ACTIVATE Unblock AIS pass 2 in 5 1100 C 0101 5 0101 5 0100 4 IOR POWER DOWN HLU Removes HDSL line p...

Page 30: ...bit occur in the returned pattern 20 errors if ILR 2 were sent followed by Normal looped data Note that this error pattern will repeat every 20 seconds as long as the IOR loopback pattern is being sen...

Page 31: ...5 1110 E 1010 A TIME OUT OVERRIDE Loopback Time out Override 1101 D 0101 5 1101 D 0110 6 FAR END NI ACTIVATE Unblock AIS pass 2 in 5 1100 C 0101 5 0101 5 0100 4 IOR POWER DOWN HLU Removes HDSL line p...

Page 32: ...ecute all the HiGain loopbacks shown in Figure 6 Note that all code sequences must be present for at least five seconds ABBREVIATIONS USED BELOW LU LoopUp LD LoopDown NI Network Interface CI Customer...

Page 33: ...des required to execute all the HiGain system loopbacks shown in Figure 6 Note that all code sequences must be present for at least five seconds ABBREVIATIONS USED BELOW LU LoopUp LD LoopDown NI Netwo...

Page 34: ...c errors including the frame bits occur in the returned pattern 20 errors if ILR 2 were sent followed by Normal looped data Note that this error pattern will repeat every 20 seconds as long as the IOR...

Page 35: ...BK Alternate Query loopback 1101 D 0101 5 1110 E 1010 A TIME OUT OVERRIDE Loopback Time out Override 1101 D 0101 5 1101 D 0110 6 IOR POWER DOWN HLU Removes HDSL line power 0110 6 0111 7 0110 6 0111 7...

Page 36: ...gnal 2 The HLU HRU transceivers are trying to establish contact with each other ACQ1 or ACQ2 Acquisition 1 or Acquisition 2 The HLU HRU multiplexers are trying to establish synchronization over each l...

Page 37: ...e Defines the type of frame pattern being received from the DSX 1 Displayed during System Settings review mode defined above CODE Line Code AMI B8ZS This is the line code that the HLU 232 List 1D is r...

Page 38: ...shold set by the user MPRO Manual Protect Mode Displayed on Protection HLU only Indicates that the Manual Protect mode has been activated either from a dumb terminal or from the front panel MDIS Manua...

Page 39: ...to be cleared 5 06 Figure 13 shows the 7 DAY PERFORMANCE HISTORY Screen The Errored Seconds and Unavailable Seconds for both HDSL loops and each of the two DS1 inputs are listed for the current and pr...

Page 40: ...n AIS all 1s pattern is being transmitted from the remote or local T1 output port MAL1 Margin Alarm 1 The margin on HDSL loop 1 has dropped below the threshold 1 to 15 dB set by the user MAL2 Margin A...

Page 41: ...MANUAL LOOPBACK buttons HRU 412 front panel button or maintenance terminal Figure 6 NLOC Network Local Loopback Loopback at HLU 232 List 1D local towards network initiated from CO network by IOR code...

Page 42: ...ge indicate out of tolerance components or excessive temperature drift in critical components HDSL 24 Hour ES Errored Seconds The number of 1 second intervals that contained at least 1 CRC error This...

Page 43: ...Section 150 232 100 Revision 01 Page 43 Figure 7 HLU 232 List 1D Main Menu for the Primary Line Unit Figure 8 HLU 232 List 1D non Doubler Span Status...

Page 44: ...Section 150 232 100 Revision 01 Page 44 Figure 9 Set Clock Menu Figure 10 HLU 232 List 1D System Settings Main Menu...

Page 45: ...Section 150 232 100 Revision 01 Page 45 Figure 11 HLU 232 List 1D non Doubler Loopback Menu Figure 12 HLU 232 List 1D non Doubler Performance Data...

Page 46: ...Section 150 232 100 Revision 01 Page 46 Figure 13 HLU 232 List 1D non Doubler Performance Data History Figure 14 HLU 232 List 1D non Doubler Alarm History...

Page 47: ...Section 150 232 100 Revision 01 Page 47 Figure 15 HLU 232 List 1D Main Menu for the Protection Line Unit Figure 16 Protection Switch Configuration Menu for the Protection Line Unit...

Page 48: ...Section 150 232 100 Revision 01 Page 48 Figure 17 Protection Mode Menu for the Protection Line Unit Figure 18 View Switchover History for the Protection Line Unit...

Page 49: ...r that is converted into heat within the unit It contributes to the total heat generated and is used to determine the maximum number of shelves per bay that do not exceed the maximum power dissipation...

Page 50: ...0 52 34 25 9 0 8 5 ON 56 0 0 60 0 43 34 25 9 0 8 5 TABLE 15 HLU 232 LIST 1D HDU 451 LIST 1 2 3 and 4 DEPLOYMENT GUIDELINES Shelf Type Shelf Fuse Amps Max Number of Doubler Systems Per Shelf 60 mA CPE...

Page 51: ...ction Table 17 complies with that proposed for HDSL systems in the T1 E 1 4 92 recommendation with the following additions Query loopback IOR power down Three loopback time out choices Initiation from...

Page 52: ...mands when its framing mode is set to UNFR and the in band commands are sent in either an SF or ESF mode The frame bits override the command bits and cause errors in the command sequence These errors...

Page 53: ...4 minute power control timer 4 03 If trouble is encountered on the HLU 232 List 1D DSX 1 interface verify that the HLU 232 List 1D is properly seated in the HSA 232 adapter and the HSA 232 is properly...

Page 54: ...SX 1 CI DS 1 NREM HRU 412 AIS AIS NDU1 NDU2 C DU1 HRU 412 SPAN 1 SPAN 2 SPAN 3 SPAN 1 SPAN 2 SPAN 3 AIS HDSL SPAN TLOS LOGIC AIS HDSL SPAN SMJK HRU 412 HDU HDU HRU 412 HRU 412 2 in 5 3 in 7 3 in 6 2 I...

Page 55: ...the remote location CDU1 by issuing the 4 in 6 loopback in band loop up code at the HRU 412 DS1 input port 10 Doubler 1 can engage loopback from the local location NDU1 by issuing the 2 in 6 loopback...

Page 56: ...ame bit occur in the returned pattern 10 errors if ILR 1 were sent 20 errors if ILR 2 200 errors if ILR 20 followed by Normal looped data Note that this error pattern will repeat every 20 seconds as l...

Page 57: ...D 0101 5 1101 D 0101 5 IR ALTERNATE QUERY LPBK Alternate Query loopback 1101 D 0101 5 1110 E 1010 A TIME OUT OVERRIDE Loopback Time out Override 1101 D 0101 5 1101 D 0110 6 FAR END NI ACTIVATE Unblock...

Page 58: ...bit occur in the returned pattern 10 errors if ILR 1 were sent 20 errors if ILR 2 200 errors if ILR 20 followed by Normal looped data Note that this error pattern will repeat every 20 seconds as long...

Page 59: ...D 0101 5 1101 D 0101 5 IR ALTERNATE QUERY LPBK Alternate Query loopback 1101 D 0101 5 1110 E 1010 A TIME OUT OVERRIDE Loopback Time out Override 1101 D 0101 5 1101 D 0110 6 FAR END NI ACTIVATE Unblock...

Page 60: ...BBREVIATIONS USED BELOW LU LoopUp LD LoopDown NI Network Interface CI Customer Interface ESF DL Extended Super Frame Data Link ADDRESSABLE 3 A3LB REPEATER LOOPBACK COMMANDS Position Name Code HLU 232...

Page 61: ...t least five seconds ABBREVIATIONS USED BELOW LU LoopUp LD LoopDown NI Network Interface CI Customer Interface ESF DL Extended Super Frame Data Link ADDRESSABLE 4 A4LB REPEATER LOOPBACK COMMANDS Posit...

Page 62: ...ur in the returned pattern 10 errors if ILR 1 were sent 20 errors if ILR 2 200 errors if ILR 20 followed by Normal looped data Note that this error pattern will repeat every 20 seconds as long as the...

Page 63: ...IR QUERY LPBK Query loopback 1101 D 0101 5 1101 D 0101 5 IR ALTERNATE QUERY LPBK Alternate Query loopback 1101 D 0101 5 1110 E 1010 A TIME OUT OVERRIDE Loopback Time out Override 1101 D 0101 5 1101 D...

Page 64: ...or 2 of span 3 ACQ1 ACQ2 Acquisition 1 or Acquisition 2 The HLU HRU or 1st Doubler multiplexers are trying to establish synchronization over each of Loops 1 or 2 of span 1 A2L1 A2L2 Acquisition 2 Loo...

Page 65: ...ng received from the DSX 1 Displayed during System Settings mode defined above CODE Line Code AMI B8ZS This is the line code that the HLU 232 List 1D is receiving at its DSX 1 interface Displayed duri...

Page 66: ...shold set by the user MPRO Manual Protect Mode Displayed on Protection HLU only Indicates that the Manual Protect mode has been activated either from a dumb terminal or from the front panel MDIS Manua...

Page 67: ...is screen 5 06 Figure 28 through Figure 31 show the PERFORMANCE DATA screens for Doubler applications Both the Errored and Unavailable Seconds for both HDSL loops and each T1 input are listed at 15 mi...

Page 68: ...second Doublers HDU1 HDU2 for two Doubler circuits The SPAN 3 Screen refers to the loops between the second Doubler and the HRU 412 for two Doubler circuits The RS 232 terminal interface at the HRU 4...

Page 69: ...rgin Alarm 1 The margin on HDSL loop 1 has dropped below the threshold 1 to 15 dB set by the user Setting the threshold to 0 inhibits the margin alarm MAL2 Margin Alarm 2 The margin on HDSL loop 2 has...

Page 70: ...etwork initiated by IOR code in band loop code or HLU 232 front panel MANUAL LOOPBACK buttons or maintenance terminal Figure 19 HDU2 Network Doubler 2 Loopback Loopback at Doubler 2 towards network in...

Page 71: ...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 HDSL 24 Hour UAS Unavailable Seconds The number of secon...

Page 72: ...Section 150 232 174 Revision 01 Page 72 Figure 20 HLU 232 List 1D Main Menu for the Primary Line Unit Figure 21 HLU 232 List 1D Status Display Span 1 1 or 2 Doublers...

Page 73: ...Section 150 232 174 Revision 01 Page 73 Figure 22 HLU 232 List 1D Status Display Span 2 1 Doubler Figure 23 HLU 232 List 1D Status Display Span 2 2 Doublers...

Page 74: ...Section 150 232 174 Revision 01 Page 74 Figure 24 HLU 232 List 1D Status Display Span 3 2 Doublers Figure 25 HLU 232 List 1D Set Clock Menu...

Page 75: ...Section 150 232 174 Revision 01 Page 75 Figure 26 HLU 232 List 1D Systems Settings Menu Figure 27 HLU 232 List 1D Doubler Loopback Menu...

Page 76: ...Section 150 232 174 Revision 01 Page 76 Figure 28 HLU 232 List 1D Performance Data Span 1 1 or 2 Doublers Figure 29 HLU 232 List 1D Performance Data Span 2 1 Doubler...

Page 77: ...Section 150 232 174 Revision 01 Page 77 Figure 30 HLU 232 List 1D Performance Data Span 2 2 Doublers Figure 31 HLU 232 List 1D Performance Data Span 3 2 Doublers...

Page 78: ...Section 150 232 174 Revision 01 Page 78 Figure 32 HLU 232 List 1D Performance Data History Span 1 1 or 2 Doublers Figure 33 HLU 232 List 1D Performance Data History Span 2 1 Doubler...

Page 79: ...Section 150 232 174 Revision 01 Page 79 Figure 34 HLU 232 List 1D Performance Data History Span 2 2 Doublers Figure 35 HLU 232 List 1D Performance Data History Span 3 2 Doublers...

Page 80: ...Section 150 232 174 Revision 01 Page 80 Figure 36 HLU 232 List 1D Alarm History Span 1 1 or 2 Doublers Figure 37 HLU 232 List 1D Alarm History Span 2 1 or 2 Doublers...

Page 81: ...Section 150 232 174 Revision 01 Page 81 Figure 38 HLU 232 List 1D Alarm History Span 3 2 Doublers Figure 39 HLU 232 List 1D Main Menu for the Protection Line Unit...

Page 82: ...Section 150 232 174 Revision 01 Page 82 Figure 40 Protection Switch Configuration Menu Figure 41 Protection Mode Menu...

Page 83: ...Section 150 232 174 Revision 01 Page 83 Figure 42 View Switchover History Copyright 1996 PairGain Technologies Inc PairGain is a registered trademark and HiGain is a trademark of PairGain Technologies...

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