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Related Manuals for PairGain HiGain HLU-D41
Summary of Contents for PairGain HiGain HLU-D41
- Page 1 Model List Number Part Number CLEI Code HLU-D41 150-1260-24 T1L2BE0AAA ECHNOLOGIES NGINEERING ERVICES ECHNICAL RACTICE 150-441-124-01 ECTION Revision History of this practice. June 12, 1997 A) Initial Release...
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Page 2: Table Of Contents
25. Digital Data Service (DDS) NEI Test Access and Control ..........40 F. PRODUCT SUPPORT ........................41 26. Technical Support......................41 27. PairGain Warranty ......................41 28. Certification........................41 G. ABBREVIATIONS AND GLOSSARY ..................42 29. Abbreviations and Glossary ....................42 Page ii PairGain Engineering - Plant Series HiGain HLU-D41... - Page 3 Three types of messages, identified by icons, appear in the text: A note informs you of special circumstances. A caution indicates the possibility of equipment damage. A warning indicates the possibility of personal injury. HiGain HLU-D41 PairGain Engineering - Plant Series Page iii...
- Page 4 ©Copyright 1997 PairGain Technologies, Inc. PairGain is a registered trademark, and HiGain is a trademark of PairGain Technologies, Inc.
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Page 5: Product Overview
A. PRODUCT OVERVIEW 1. Description and Features ® ™ This technical practice describes the PairGain HiGain HLU-D41 List 2D, a HiGain Line Unit (HLU) which functions as the Central Office (CO) side of a repeater-less Fractional T1 (FT1) transmission system. The HLU-D41 can be plugged into a channel unit slot of a D4 channel bank or an SLC-96 channel bank. - Page 6 Configured as Data Circuit-Terminating Equipment (DCE) which allows you to control the HLU-D41 through a dumb terminal (or a PC with terminal emulation software). Retaining latch Latch used to retain the HLU-D41 in the channel bank. Page 2 PairGain Engineering - Plant Series HiGain HLU-D41...
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Page 7: Specifications
Operating Humidity ...........5 to 95% (non-condensing) Mounting Single channel unit slot of a D4 or SLC-96 channel bank. Line Rate ............1.544 Mbps ±200 bps Line Format ............AMI, B8ZS or ZBTSI Frame Format.............ESF or SF HiGain HLU-D41 PairGain Engineering - Plant Series Page 3... -
Page 8: Applications
Are easily installed allowing service to be provided within hours. Fiber optic systems can be installed at a leisurely pace and cut-over from the installed HiGain system when convenient to do so. The installed HiGain system can then be easily removed and utilized elsewhere. Page 4 PairGain Engineering - Plant Series HiGain HLU-D41... -
Page 9: Functional Operation
The HLU-D41 block diagram is shown in Figure 3. Figure 3. HLU-D41 Block Diagram The HLU-D41 uses one PairGain Technologies 2B1Q HDSL transceiver to establish a full duplex 784 kbps data link to the remote unit in the following sequence: Multiplexed DS0 channels are extracted from the channel bank backplane. -
Page 10: Power Consumption And Powering The Remote Unit
At the HRU-512, connect JP2 across just one of the two terminals. These are the factory default settings. Enable the PWRF option setting using the front panel setup buttons, or the Maintenance Terminal menus using the POWER option in the System Settings menu. Page 6 PairGain Engineering - Plant Series HiGain HLU-D41... -
Page 11: Alarms
Revision 01 June 12, 1997 Section 150-441-124 See the PairGain Technologies HiGain-1 FT1 Remote Unit, Model HRU-512, Issue 1 Technical Practice (Part No. 150-512-100-02) for further information. Power Conversion. The HLU-D41 contains two separate power converters. The linear regulator converts the D4 channel bank dc power (+5 Vdc and -12 Vdc) to logic power for the HLU-D41 circuits. -
Page 12: Installation
7. Inspecting Your Shipment When you receive the equipment, 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. You shipment should consist of: •... -
Page 13: Hlu-D41 Card Edge Pin-Out Diagram
The HLU-D41 occupies one slot in an AT&T-type D4 channel bank or equivalent SLC-96 bank. The card edge pin-out diagram for the HLU-D41 is shown in Figure 4. Figure 4. HLU-D41 Card Edge Pin-outs HiGain HLU-D41 PairGain Engineering - Plant Series Page 9... - Page 14 * CONT=Contiguous slot setting ALT=Alternating slot setting See Section 12 if configuring timeslots using the front panel Mode and Choice Setup buttons, or Section 18.9 if configuring timeslots using the Maintenance Terminal menus. Page 10 PairGain Engineering - Plant Series HiGain HLU-D41...
- Page 15 Physical Slots Time Slots SLC-96 Mode III D1D Channel Counting Physical Slots Time Slots Physical Slots Time Slots SLC-96 Mode III D4 Channel Counting Physical Slots Time Slots Physical Slots Time Slots HiGain HLU-D41 PairGain Engineering - Plant Series Page 11...
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Page 16: Installing The Hlu-D41
Push the unit in until it is entirely within the card guide and the retaining latch locks into place indicating that the unit is properly seated. Page 12 PairGain Engineering - Plant Series HiGain HLU-D41... -
Page 17: Connecting To A Dumb Terminal
PC running a terminal emulation program with a standard RS-232 cable. Once connected to a dumb terminal, you can access the maintenance, provisioning, and performance screens. Figure 6 shows the HLU-D41 DB-9 RS-232 I/O. Figure 6. DB-9 RS-232 I/O HiGain HLU-D41 PairGain Engineering - Plant Series Page 13... -
Page 18: Initialization
13, 14, 15, and 16 at the line unit, but in time slots 1, 2, 3, and 4 at the remote unit. Page 14 PairGain Engineering - Plant Series HiGain HLU-D41... -
Page 19: Setting Options From The Front Panel
The following three user options cannot be set using front panel Mode and Choice Setup buttons, but must be set using the Maintenance Terminal menus: Circuit ID, Margin Alarm Threshold, and Signaling. HiGain HLU-D41 PairGain Engineering - Plant Series Page 15... - Page 20 Confirms that all operating parameters (except Margin) are to be updated to the new selections. Prevents newly selected operating parameters from being updated. These options remain as they were before the setting options procedure was started. * Default setting. Page 16 PairGain Engineering - Plant Series HiGain HLU-D41...
- Page 21 24 hour ES threshold. Margin Alarm The margin on the HDSL loop has dropped below the user- defined threshold (1 to 15 dB) set by the user. HiGain HLU-D41 PairGain Engineering - Plant Series Page 17...
- Page 22 DS1 line code being received by the HLU-D41 if the DS1 code pattern is set to Auto. Otherwise the line code parameter mimics either of the other two line code settings, AMI or B8ZS. Repeat this process until you have verified the system settings. Page 18 PairGain Engineering - Plant Series HiGain HLU-D41...
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Page 23: Mandatory System Options
Press the Choice Setup button to select the desired bandwidth (in 64K increments through 768K). After the desired bandwidth displays, press the Mode Setup button. This updates the BAND setting to the selected bandwidth and causes the following two-part message to display: CONF NO HiGain HLU-D41 PairGain Engineering - Plant Series Page 19... - Page 24 Do not initiate a loopback until the initialization mode is complete. Otherwise, the fractional system may operate in a mode not intended and may cause interference to other channel time slots. Page 20 PairGain Engineering - Plant Series HiGain HLU-D41...
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Page 25: Setting Options From The Maintenance Terminal
Selecting an Option. The Maintenance Terminal menus use two different means of selecting an option: Press the key indicated to the left of the selection. Press the letter in parenthesis of the parameter to be changed. HiGain HLU-D41 PairGain Engineering - Plant Series Page 21... -
Page 26: Maintenance Terminal Main Menu
Allows you to enter a unique circuit ID (up to 24 characters) Section 23 15.2 To display the Maintenance Terminal Main menu: Press the <spacebar> several times to initiate the RS-232 connection. The Maintenance Terminal Main menu appears: Page 22 PairGain Engineering - Plant Series HiGain HLU-D41... -
Page 27: View Span Status
Press <E> to return to the previous menu. 16.2 Table 13 shows the Span Status fields and descriptions. Table 14 lists the "Alarm" field messages and descriptions and Table 15 lists the "Loopback" field messages and descriptions. HiGain HLU-D41 PairGain Engineering - Plant Series Page 23... - Page 28 = List # of the HLU. " " " " HRU or HDU/w.x-y = the software version number of the HRU or HDU. = List # of the HRU or HDU. Page 24 PairGain Engineering - Plant Series HiGain HLU-D41...
- Page 29 The Span 3 screen refers to the loops between the second doubler and the HRU-512 for two-doubler circuits. All status screens contain the same DS1 interface information. HiGain HLU-D41 PairGain Engineering - Plant Series Page 25...
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Page 30: Set Clock
The last date, however, is retained in NVRAM and reappears when power is restored. Press <Enter> and the remote unit is not updated. Page 26 PairGain Engineering - Plant Series HiGain HLU-D41... -
Page 31: System Settings
Press <L> in the System Settings menu. The Network Loopback option changes to the next available setting. Repeat this process until the desired setting appears next to the Network Loopback option name in the menu. HiGain HLU-D41 PairGain Engineering - Plant Series Page 27... - Page 32 24 DS0 time slots, until frame sync is re-acquired. 18.9.2 Voice Applications. CONT is the recommended setting for voice channels or with D4 channel banks configured for B8ZS. Page 28 PairGain Engineering - Plant Series HiGain HLU-D41...
- Page 33 The "Signaling" field adds channels each time you press B, such that 01 equates to DS0 Bandwidth 64K, 02 equates to DS0 Bandwidth 128K, etc. The maximum bandwidth setting for the FT1 circuit is 768K (or 768 kbps). HiGain HLU-D41 PairGain Engineering - Plant Series Page 29...
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Page 34: Loopback Mode
NDU1 and CDU1 are available for single doubler applications. NDU2 and CDU2 are available for two doubler Page 30 PairGain Engineering - Plant Series HiGain HLU-D41... - Page 35 Mode in the Main menu. The loopback continues to cycle in the system depending upon your Loopback Timeout setting. You can always go back to the Loopback menu and press A to disable the NDU1 loopback. HiGain HLU-D41 PairGain Engineering - Plant Series Page 31...
- Page 36 Mode in the Main menu. The loopback continues to cycle in the system depending upon your Loopback Timeout setting. You can always go back to the Loopback menu and press A to disable the CDU1 loopback. Page 32 PairGain Engineering - Plant Series HiGain HLU-D41...
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Page 37: View Performance Data
Status screen. Note that since the HLU-D41 is considered to be the master module, this clears all performance data screens at both the HLU-D41 and the HRU-512. The menus at the HRU-512 do not allow the counters to be cleared. HiGain HLU-D41 PairGain Engineering - Plant Series Page 33... -
Page 38: View Performance History
Status screen. Note that since the HLU-D41 is considered to be the master module, this clears all performance history screens at both the HLU-D41 and the HRU-512. The menus at the HRU-512 do not allow the counters to be cleared. Page 34 PairGain Engineering - Plant Series HiGain HLU-D41... -
Page 39: Alarm History
The Count column lists the number of times each alarm occurred. The maximum non-overflowing count is 999. 22.3.1 Span 1. The Span 1 Screen concerns alarms that occurred on the HDSL loops between the HLU-D41 and the first doubler (HDU1). HiGain HLU-D41 PairGain Engineering - Plant Series Page 35... -
Page 40: Enter Circuit Id
DFLT setting option is utilized. The Circuit ID # is not available at the HRU-512 Maintenance Port. 23.3 The Circuit ID is stored in NVRAM and thus remains if power is lost. Page 36 PairGain Engineering - Plant Series HiGain HLU-D41... -
Page 41: Troubleshooting
Table 17 lists the HiGain loopbacks which are available for any system configuration. Table 18 shows a comprehensive listing of all HiGain loopbacks. Figure 8. HiGain FT1 Loopback Configuration HiGain HLU-D41 PairGain Engineering - Plant Series Page 37... - Page 42 HLU-D41 Mode and Choice Setup buttons or Maintenance Terminal menus. CDU 2 Customer Doubler 2 Loopback Loopback at second doubler towards CI initiated by HLU-D41 Mode and Choice Setup buttons or Maintenance Terminal menus. Page 38 PairGain Engineering - Plant Series HiGain HLU-D41...
- Page 43 To initiate a manual loopback: Press both the Mode Setup button and the Choice Setup button simultaneously for at least three seconds. The following message blinks in one-second intervals: MAN LPBK Followed by: NLO? HiGain HLU-D41 PairGain Engineering - Plant Series Page 39...
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Page 44: Digital Data Service (Dds) Nei Test Access And Control
A 25-second timer is started after using setting 2 above. Loop up is aborted if setting 3 and 4 are not completed within this 25-second period. To loop down, setting 1 (above) must be transmitted. Page 40 PairGain Engineering - Plant Series HiGain HLU-D41... -
Page 45: Product Support
27. PairGain Warranty 27.1 PairGain Technologies warrants this product to be free of defects and to be fully functional for a period of 60 months from the date of original shipment, given proper customer installation and regular maintenance. PairGain will repair or replace any unit without cost during this period if the unit is found to be defective for any reason other than abuse or improper use or installation. -
Page 46: Abbreviations And Glossary
Two groups of 12 digital channels combined to form one single 24-channel T1 system. Digital Signal, level 0. 24 DS0s (24x64 kbps) equal one DS1. Digital Service, level 1. One DS1 is the same as one T1 (1.544 Mbps). Page 42 PairGain Engineering - Plant Series HiGain HLU-D41... - Page 47 22 to 6 dB. Network Element Interface Network Interface Network Interface Device Network Interface Unit NLOC Network Local Loopback NREM Network Remote Loopback NVRAM Non-Volatile RAM HiGain HLU-D41 PairGain Engineering - Plant Series Page 43...
- Page 48 T1 termination and are buried in the voice data of each voice channel in the T1 circuit. Return Material Authorization Super Frame Signal-to-Noise Ratio Unavailable Seconds ZBTSI Zero Byte Time Slot Interface Page 44 PairGain Engineering - Plant Series HiGain HLU-D41...