PairGain HLU-431 Quick Installation Manual
Higain line unit
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Summary of Contents for PairGain HLU-431
- Page 1 UICK NSTALLATION UIDE Model List Part Number CLEI Code HLU-431 150-1504-14 T1L2FKDAAA ECHNOLOGIES 350-431-114-01 ECTION Revision history of this guide. Revision 01—January 27, 1998 A) Initial Release...
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Page 2: Table Of Contents
Copyright ©1998 PairGain Technologies, Inc. PairGain and HiGain are registered trademarks of PairGain Technologies, Inc. Information contained in this document is company private to PairGain Technologies, Inc. and shall not be modified, used, copied, reproduced or disclosed in whole or in part without the written consent of PairGain. -
Page 3: Introduction
Revision 01 Section 350-431-114-01 Introduction ® ® The PairGain HiGain Line Unit Model HLU-431 List (Part Number 150-1504-14) is the Central Office (CO) side of a repeaterless T1 transmission system and is used in conjunction with the HRU Remote Unit to provide a complete HiGain High-bit-rate Digital Subscriber Line (HDSL) system. -
Page 4: Compatibility
Section 350-431-114-01 Revision 01 HLU-431 List front panel tri-color Status LED has the following states: Status LED States State Description Green Normal Operation. Flashing Green HDSL Acquisition. Flashing Red Minor Alarm. FUSE ALRM. Yellow Self Test in progress or an... -
Page 5: Installation
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 Technologies (see Technical Support on page 16). -
Page 6: Card-Edge Connectors
Section 350-431-114-01 Revision 01 Card-Edge Connectors HLU-431 card-edge connector pinouts are shown below. Page 4 HLU-431 List... -
Page 7: Installing The Line Unit
Section 350-431-114-01 Installing the Line Unit To install the HLU-431 into a shelf, slide the unit into the shelf card guides for the desired slot, then push the unit in until it is entirely within the card guide and the retaining latch locks into place, indicating that the unit is... -
Page 8: Hdsl Line Voltage Option
+100 V on loop 2 and -100 V on loop 1. The symmetry of the HDSL line powering voltage can be set by the S2 switch, located on the printed circuit board. Provisioning HLU-431 List contains a non-volatile RAM (NVRAM) which stores the system option settings. The options are set via buttons on the front panel, or through the RS-232 interface. -
Page 9: Default Settings
MODE button or do nothing for 30 seconds. Using the Craft port The Craft port, a 9-pin RS-232 connector, on the HLU-431 front panel allows you to use a standard RS-232 cable to connect your system to a dumb terminal or PC running a terminal emulation program. -
Page 10: System Options Settings
This activates the new choices and returns control to the Main Menu screen. The following three user options cannot be set from the front panel buttons: Circuit ID, DS0 Blocking, and Margin Alarm Threshold. System Options Settings HLU-431 List System Options Mode Selection Description †... - Page 11 Revision 01 Section 350-431-114-01 HLU-431 List System Options (Cont.) Mode Selection Description The DS0 blocking option can only be set through the RS-232 maintenance port with a terminal. The 4-character HLU-319 List 2D front panel LED readout only displays the BLK indicates at least one channel is blocked.
- Page 12 Section 350-431-114-01 Revision 01 HLU-431 List System Options (Cont.) Mode Selection Description FRMG AUTO* Configures HiGain to operate in an auto-framing (AUTO) mode in which it continuously searches the input T1 bit stream for a valid SF or ESF frame pattern. This feature is required for fractional T1 applications (DS0 blocking) where it insures proper channel time slot alignment.
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Page 13: Testing
Revision 01 Section 350-431-114-01 Testing HLU-431 List 4-character front panel display has many useful system diagnostic messages. They are listed in the following table. This display turns on when power is initially applied to the HLU-431 List 1D. To conserve power, the display only remains on for five minutes if neither the MODE or SEL buttons are pressed. -
Page 14: Loopbacks
Section 350-431-114-01 Revision 01 Loopbacks HLU-431 List loopback messages are listed in the following tables. A block diagram showing the GNLB locations and their activation codes are shown on page 13. Status Menu Loopback Messages: (with and without Doublers) Message... - Page 15 The loopback at doubler 1 toward CI Loopback initiated by in-band codes or the maintenance terminal. CDU2 Customer Doubler 2 The loopback at doubler 2 toward CI Loopback initiated by in-band codes or the maintenance terminal. HLU-431 List Page 13...
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Page 16: Four-Character Diagnostic Messages
Section 350-431-114-01 Revision 01 Four-Character Diagnostic Messages HLU-431 diagnostic messages are listed in the table below. Four-Character Front Panel Messages Message Full Name Description FERR Framing Bit Error Framing bit error occurred at HLU T1 input. Occurred LBPV Local Bipolar Violation A bipolar violation has been received at the T1 input to the HLU-319. - Page 17 NONE indicates no channels are blocked. BLK indicates some channels are blocked. MNGD Managed The HLU-431 List 2D is under control of the HMU network management unit. In this state, the RS-232 maintenance port on the HLU-431’s front panel is inoperative.
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Page 18: Specifications
PairGain Technical Manuals Web page at: www.pairgain.com. A password is required. If you do not have a password, contact your PairGain sales representative. If you have any comments on any PairGain documentation, send mail to technical_publications@pairgain.com. -
Page 19: Bulletin Board Services
Revision 01 Section 350-431-114-01 Bulletin Board Services PairGain maintains a computer bulletin 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 available 24-hours-a-day by calling (714) 730-3299. Transmission speeds up to 28.8 Kbps are supported with a character format of 8-N-1.