PairGain HLU-388 Quick Installation Manual
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Summary of Contents for PairGain HLU-388
- Page 1 UICK NSTALLATION UIDE Model List Part Number CLEI Code HLU-388 150-1141-24 T1L2BBBAAA ECHNOLOGIES 350-388-124-01 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
For applications without doublers, the HLU-388 List 2D is directly connected to the HRU by the two cable pairs. For doubler applications, one or two doublers may be used in the HDSL loops between the HLU-388 List 2D and the HRU. -
Page 4: Compatibility
Section 350-388-124-01 The HLU-388 List 2D 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 15). -
Page 6: Installing The Line Unit
Section 350-388-124-01 Installing the Line Unit Slide the HLU-388 into the shelf card guides for the desired slot, tilt the front panel up. Push the unit in until it is entirely within the card guide. Tilt the front panel back down so that the latch locks the unit in place:... -
Page 7: Hdsl Line Voltage Option
The options are set via buttons on the front panel, or through the RS-232 interface. They are retained if shelf power is lost or if the HLU-388 List 2D is unplugged. The System Options table on page 7 lists the system options for the HLU-388 List 2D. -
Page 8: 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-388 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 9: System Options Settings
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-388 List 2D System Options Mode Selection Description † Sets the equalizer to DSX-1 for 0 - 133 feet. - Page 10 Section 350-388-124-01 HLU-388 List 2D 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 11 Revision 01 Section 350-388-124-01 HLU-388 List 2D 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 12: Testing
The HLU-388 List 2D 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-388 List 2D. To conserve power, the display only remains on for five minutes if neither the MODE or SEL buttons are pressed. -
Page 13: Loopbacks
Revision 01 Section 350-388-124-01 Loopbacks The HLU-388 List 2D loopback messages are listed in the following tables. A block diagram showing the GNLB locations and their activation codes are shown on page 12. Loopback Descriptions Message Full Name Description SMJK... - Page 14 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. Page 12 HLU-388 List 2D...
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Page 15: Four-Character Diagnostic Messages
Revision 01 Section 350-388-124-01 Four-Character Diagnostic Messages The HLU-388 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 16 NONE indicates no channels are blocked. BLK indicates some channels are blocked. MNGD Managed The HLU-388 List 2D is under control of the HMU network management unit. In this state, the RS-232 maintenance port on the HLU-388’s front panel is inoperative.
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Page 17: Specifications
Depth:10.25"(26 c.m.) Weight:1 lb. 2 oz. Documentation The HLU-388 List 2D has a complete technical practice that you can download from the 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. -
Page 18: Bulletin Board Services
Section 350-388-124-01 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. - Page 19 Revision 01 Section 350-388-124-01 HLU-388 List 2D Page 17...