PairGain HLU-231 Quick Installation Manual
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Summary of Contents for PairGain HLU-231
- Page 1 UICK NSTALLATION UIDE Model List Part Number CLEI Code HLU-231 Issue 2 150-1243-03 T1LIE0N4AA ECHNOLOGIES 350-231-203-01 ECTION Revision History of this guide. Revision 01—November 26, 1997 A) Initial Release...
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Page 2: Table Of Contents
Four-Character Diagnostic Messages ......14 Specifications ............... 16 Documentation ..............16 Technical Support ............... 16 Bulletin Board Services ..........17 Copyright © 1997 PairGain Technologies, Inc. PairGain and HiGain are registered trademarks of PairGain Technologies, Inc. HLU-231 List 3 Issue 2... -
Page 3: Introduction
HiGain High-bit-rate Digital Subscriber Line (HDSL) system. The HLU-231 is not compatible with HiGain doublers. For more detailed information consult the HLU-231 List 3 Issue 2 Technical Practice (Section Number 150-231-203). HLU-231 List 3 Issue 2... -
Page 4: Features
Section 350-231-203 Revision 01 Features The HLU-231 Line Unit List 3 Issue 2 front panel features are: HLU-231 List 3 Issue 2... -
Page 5: Compatibility
Retaining latch Secures the HLU-231 to the shelf in which it is installed. Compatibility The HLU-231 List 3 Issue 2 is designed to mount in the following shelves with 220 mechanics: • PairGain HCS-418 19-inch shelf •... -
Page 6: Installation
The HLU-231 card-edge connector pinouts are shown below. The HLU-231 uses pins 20 and 21 as alarm-relay output. The Kentrox 220 T-Term shelf uses the same pins for external equalizer output. If the HLU-231 is installed into a Kentrox shelf, the HLU-231 ALM option must be disabled (see Provi- sioning on page 5 for further information). -
Page 7: Installing The Hlu-231
Section 350-231-203 Installing the HLU-231 To install the HLU-231 into a PairGain 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: Using The Sel And Mode Front Panel Buttons
Section 350-231-203 Revision 01 Using the SEL and MODE Front Panel Buttons To provision the HLU-231 List 3 Issue 2 through the SEL and MODE front- panel buttons: Press the MODE button for approximately one second. The message displayed on the front panel alternates between the first system parameter and its current setting. -
Page 9: Using The Craft Port
Section 350-231-203 Using the Craft port The Craft port, a 9-pin RS-232 connector, on the HLU-231 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. Once connected you can access the maintenance, provisioning, and performance screens. -
Page 10: System Settings
Deslects the ESF frame ZBTSI mode. LPBK Configures the HLU-231 to ignore the 2 in 5 Smart-Jack loopback command. ENA* Enables the HLU-231 to respond to the 2 in 5 Smart-Jack loopback command. LBTO NONE Disables automatic time-out cancellation of all loopbacks. - Page 11 Revision 01 Section 350-231-203 HLU-231 List System Options (Continued) Mode Selection Description ESAL Closes the Alarm relay contacts and flashes the red Status LED when 17 ES (17 HDSL CRC errors on either HDSL loop or a total of 17 BPVs) occur within a 24-hour period.
- Page 12 Description The DS0 blocking option can only be set through the Craft port with a terminal. The 4-character HLU-231 List 3 front panel LED readout only displays the status of the blocking option. BLK indicates at least one channel is blocked.
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Page 13: Testing
Minor alarm and diagnostic messages routinely appear on the HLU-231 front-panel four-character display. This display automatically turns on when power is initially applied to the HLU-231. To conserve power, the display remains on for only five minutes if neither the MODE or SEL buttons are pressed. -
Page 14: Loopbacks
Section 350-231-203 Revision 01 Loopbacks The HLU-231 loopback messages are listed in the following table. A block diagram showing the GNLB locations and their activation codes are shown on page 13. Status Menu Loopback Messages Message Full Name Description SMJK... - Page 15 Revision 01 Section 350-231-203 HLU-231 List 3 Issue 2...
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Page 16: Four-Character Diagnostic Messages
Section 350-231-203 Revision 01 Four-Character Diagnostic Messages The HLU-231 diagnostic messages are listed in the table below. Diagnostic Messages Message Full Name Description FERR Framing Bit Error Framing bit error occurred at HLU T1 Occurred input. LBPV Local Bipolar A bipolar violation has been received at Violation the T1 input to the HLU. - Page 17 DSX-1. Displayed during System Settings. CODE Line Code: AMI, This is the line code that the HLU is set to B8ZS receive and transmit at its T1 interfaces. Displayed during System Settings mode defined above. HLU-231 List 3 Issue 2...
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Page 18: Specifications
10” (25.4 cm) Documentation The HLU-231, List 3 Issue 2 has a complete technical practice that you can download from the PairGain Technical Manuals Web page at: www.pair- gain.com. A password is required. If you do not have a password, contact your PairGain sales representative. -
Page 19: Bulletin Board Services
Revision 01 Section 350-231-203 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.