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OL-29937-01
Model GS7000 Hub/Node Status
Monitor/Local Control Module
Installation and Configuration Guide

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  • Page 1

    OL-29937-01 Model GS7000 Hub/Node Status Monitor/Local Control Module Installation and Configuration Guide...

  • Page 3

    For Your Safety Explanation of Warning and Caution Icons Avoid personal injury and product damage! Do not proceed beyond any symbol until you fully understand the indicated conditions. The following warning and caution icons alert you to important information about the safe operation of this product: You may find this symbol in the document that accompanies this product.

  • Page 4

    Trademark Acknowledgments Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third party trademarks mentioned are the property of their respective owners.

  • Page 5: Table Of Contents

    Contents Important Safety Instructions Chapter 1 Overview Model GS7000 Hub/Node Description ................2 Overview ........................2 Physical Description ....................2 Functional Description ....................5 Status Monitor/Local Control Module Description ............8 Overview ........................8 Status Monitor Description ..................8 Local Control Module Description ................9 Chapter 2 Installation Installing the SM/LCM ......................

  • Page 6

    Contents Cisco Proprietary MIB Specifications .................. 39 Optical Transmitter Table ..................39 Optical Receiver Table....................40 saFnForwardConfig ....................40 Redundancy Control Table ..................42 Power Supply Table....................42 HMS MIB Specifications ....................... 43 SCTE-HMS-PROPERTY-MIB .................. 43 SCTE-HMS-ALARMS-MIB ..................45 SCTE-HMS-COMMON-MIB ................... 46 SCTE-HMS-FIBERNODE-MIB ................

  • Page 7: Important Safety Instructions

    Important Safety Instructions Important Safety Instructions Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Only use attachments/accessories specified by the manufacturer. Read and Retain Instructions Carefully read all safety and operating instructions before operating this equipment, and retain them for future reference.

  • Page 8

    Important Safety Instructions Know the following safety warnings and guidelines: Only qualified service personnel are allowed to perform equipment installation  or replacement. Only qualified service personnel are allowed to remove chassis covers and access  any of the components inside the chassis. Equipment Placement WARNING: Avoid personal injury and damage to this equipment.

  • Page 9

    Important Safety Instructions Ensure the installation site and operating environment is compatible with the  equipment’s International Protection (IP) rating specified in the equipment’s data sheet. Connecting to Utility AC Power Important: If this equipment is a Class I equipment, it must be grounded. If this equipment plugs into an outlet, the outlet must be near this equipment, ...

  • Page 10

    Important Safety Instructions Safety Plugs (USA Only) This equipment may be equipped with either a 3-terminal (grounding-type) safety plug or a 2-terminal (polarized) safety plug. The wide blade or the third terminal is provided for safety. Do not defeat the safety purpose of the grounding-type or polarized safety plug.

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    Important Safety Instructions Equipotential Bonding If this equipment is equipped with an external chassis terminal marked with the IEC 60417-5020 chassis icon ( ), the installer should refer to CENELEC standard EN 50083-1 or IEC standard IEC 60728-11 for correct equipotential bonding connection instructions.

  • Page 12

    Important Safety Instructions Electrostatic Discharge Electrostatic discharge (ESD) results from the static electricity buildup on the human body and other objects. This static discharge can degrade components and cause failures. Take the following precautions against electrostatic discharge: Use an anti-static bench mat and a wrist strap or ankle strap designed to safely ...

  • Page 13

    Important Safety Instructions The batteries may contain perchlorate, a known hazardous substance, so special  handling and disposal of this product might be necessary. For more information about perchlorate and best management practices for perchlorate-containing substance, see www.dtsc.ca.gov/hazardouswaste/perchlorate. Modifications This equipment has been designed and tested to comply with applicable safety, laser safety, and EMC regulations, codes, and standards to ensure safe operation in its intended environment.

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    Important Safety Instructions FCC Statement for Class A Equipment This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when this equipment is operated in a commercial environment.

  • Page 15: Chapter 1 Overview

    Chapter 1 Overview Introduction This manual describes the installation, configuration, operation, and troubleshooting of the Status Monitor/Local Control Module (SM/LCM) for the Model GS7000 Hub/Node. In This Chapter  Model GS7000 Hub/Node Description ..........2  Status Monitor/Local Control Module Description ......8...

  • Page 16: Model Gs7000 Hub/node Description

    Chapter 1 Overview Model GS7000 Hub/Node Description Overview This section contains a brief physical and functional description of the Model GS7000 GainMaker Node and Model GS7000 Optical Hub. ® For complete information about the Model GS7000 Node, refer to Model GS7000 GainMaker Scaleable 4-Port Node Installation and Operation Guide, part number 78- 4013584-01.

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    Model GS7000 Hub/Node Description Not every Model GS7000 Node will contain all of these modules. The Model GS7000 Hub/Node is a versatile platform that can be configured to meet network requirements. The following illustration shows the external housing of the Model GS7000 Hub/Node.

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    Chapter 1 Overview The following illustration shows the Model GS7000 Node internal modules and components. This model is the 4-way forward segmentable node. The 2-way forward segmentable node has a different RF amplifier module. OL-29937-01...

  • Page 19: Functional Description

    Functional Description Node The Model GS7000 Node is used in broadband hybrid fiber/coax (HFC) networks. It is configured with the receivers, transmitters, configuration modules, and other modules to meet your unique network requirements. This platform allows independent segmentation and redundancy for both the forward and reverse paths in a reliable, cost-effective package.

  • Page 20

    Diplex filter choices are 52 MHz, 54 MHz, 70 MHz, or 86 MHz. The forward path of the Model GS7000 Node can be deployed with a broadcast 1310/1550 nm optical receiver with common services distributed to either four output ports (all high level) or six output ports (two high level and four lower level).

  • Page 21

    Model GS7000 Hub/Node Description The Model GS7000 Node can be upgraded to a Model GS7000 Hub Node in the field. This is accomplished by installing EDFA modules, optical switching modules, and the SM/LCM in the node lid. The Model GS7000 Hub Node can then serve as a traditional node feeding the local HFC plant and as an optical hub with the optical amplifiers.

  • Page 22: Status Monitor/local Control Module Description

    Status Monitor/Local Control Module Description Overview A local control module and a status monitor are available for the Model GS7000 Hub/Node. A status monitor consists of a local control module with a transponder core module installed in the housing. The same housing is used for both units.

  • Page 23: Local Control Module Description

    Status Monitor/Local Control Module Description Note: The transponder core module can be seen through the Heart Beat/Receive/Error indicator cutout in the cover. Local Control Module Description The local control module locally monitors the following node voltages and signals:  Receiver optical input level (all receivers) ...

  • Page 24

    6 dB (wink) attenuators, the reverse band on/off switches, the optical switch, and optical amplifiers through the PC-based GS7000 ViewPort software. All parameters monitored by the local control module can be displayed and reviewed using ViewPort.

  • Page 25: Chapter 2 Installation

    Chapter 2 Installation This chapter describes the physical installation of the SM/LCM into the housing lid of a Model GS7000 Node, Hub Node, or Optical Hub. In This Chapter  Installing the SM/LCM ................ 12 OL-29937-01...

  • Page 26: Installing The Sm/lcm

    Chapter 2 Installation Installing the SM/LCM Overview You must perform the following steps to install the SM/LCM in a Model GS7000 Node, Hub Node, or Optical Hub. Open the housing. Install the SM/LCM in its correct position in the housing lid.

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    Installing the SM/LCM Carefully insert the SM/LCM into the housing lid in the position shown in the following illustrations. CAUTION: Do not use too much force when seating the module in the node. If too much resistance is felt, remove the module and inspect the module electrical connector pins.

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    Chapter 2 Installation SM/LCM mounting position for a Model GS7000 Node or Hub Node OL-29937-01...

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    Installing the SM/LCM SM/LCM mounting position for a Model GS7000 Optical Hub Important: To ensure proper connector alignment and fit, make sure that the connector guide pin on the back of the SM/LCM module inserts into the alignment hole on the optical interface board (OIB) as shown below.

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    Chapter 2 Installation OIB SM/LCM connector for a Model GS7000 Node or Hub Node OIB SM/LCM connector for a Model GS7000 Optical Hub Tighten the SM/LCM module hold-down screws to secure the module in the lid. Torque the screws from 25 to 30 in-lbs (2.8 to 3.4 Nm).

  • Page 31: Closing The Housing

    Installing the SM/LCM Closing the Housing Close the housing as follows. Ensure any worn gaskets are replaced, and the gaskets are clean and in the correct position. Carefully close the lid. CAUTION: Use caution when closing the housing. Improper closing may result in the unit not being sealed from the environment.

  • Page 32

    Chapter 2 Installation Two power supplies can provide a maximum power level of 100 watts to the node or hub node. The RF amplifier uses the majority of the available power. Maintain the total power consumption of all modules in the housing within these guidelines to minimize the heat generated.

  • Page 33: Chapter 3 Configuration

    Chapter 3 Configuration This chapter describes configuration procedures for the SM/LCM. In This Chapter  Local Control Module Configuration Procedure ......20  Status Monitor Configuration Procedure .......... 27 OL-29937-01...

  • Page 34: Local Control Module Configuration Procedure

    Chapter 3 Configuration Local Control Module Configuration Procedure Introduction The LCM needs to know the hub/node's hardware configuration (number of EDFAs, optical switches, receivers, transmitters, power supplies, and AC lines mounted or connected) so that it can control the node's behavior correctly. If an LCM was mounted in the node at the manufacturer, it should be configured correctly as shipped.

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    Local Control Module Configuration Procedure Note: During the module check, the LCM micro-controller samples the inputs from the optical transmitters (up to 4), optical receivers (up to 4), power supplies (up to 2), and AC lines (up to 2), to determine which of these items are installed in the node. The LCM also attempts to contact optical switches and EDFAs that may be present in the hub/node.

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    Result: The ViewPort setup wizard screen displays. Click Next. Result: The Select Installation Folder screen displays. Accept the default installation folder or change to a different folder if desired. Select Everyone under "Install GS7000 ViewPort for..." and click Next. OL-29937-01...

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    Local Control Module Configuration Procedure Follow the remaining screen prompts to complete the installation. Result: When complete, the following screen displays. Click Close. Result: ViewPort is installed in the chosen directory, a USB driver file is added to the system, and a ViewPort icon is added to your desktop. Double-click the ViewPort icon on your desktop to run the program.

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    Chapter 3 Configuration Configure the hub/node and its internal modules using ViewPort. Note: For complete instructions on using ViewPort, please access and read the ViewPort software's online help file. ViewPort Help Topics Complete instructions for using ViewPort are contained in the ViewPort software's online help file.

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    Local Control Module Configuration Procedure Configuring the Chassis  - Selecting Chassis Type - Selecting Forward Configuration Module Type (FCM) - Selecting Reverse Configuration Module Type (RCM) - Adding Modules to the Chassis - Removing Modules from the Chassis - Duplicating a Module's Settings - Moving a Module to Another Slot - Saving a Configuration File Configuring the Modules...

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    Chapter 3 Configuration Tutorials  - Resolving an Optical Receiver Issue - Adding Modules and Saving the Configuration OL-29937-01...

  • Page 41: Status Monitor Configuration Procedure

    Status Monitor Configuration Procedure Status Monitor Configuration Procedure Introduction The SM needs to know the node's hardware configuration (number of receivers, transmitters, EDFAs, optical switches, power supplies, and AC lines mounted or connected) so that it can monitor and control the node's behavior correctly. This configuration data is stored in an EEPROM residing on the SM main board.

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    Chapter 3 Configuration Configuration Parameter Description/Values RX Frequency The downstream frequency on which the transponder receives commands from the headend. Valid range is 45 MHz to 174 MHz. TX Frequency The upstream frequency on which the transponder transmits to the headend. Valid range is 5 MHz to 65 MHz.

  • Page 43: Configuring The Sm

    Status Monitor Configuration Procedure Configuration Parameter Description/Values Channel Status Transponder module status. Possible values are No Freq Found, Registered, Ch Description. Configuring the SM The SM can be configured using two different methods, as follows: Auto-registering at power up  Manually assisted configuration/registering ...

  • Page 44: Application Software Remote Download And Upgrade

    Capabilities below. Using Remote Configuration Capabilities A Model GS7000 Hub/Node can be configured from the headend ONLY if certain pieces of software are loaded at the headend, as follows. If a MIB browser is used: GS7000 Proprietary MIB (part number 7014169) is ...

  • Page 45

    Launch the HMS Download Tool. The main screen appears as shown below. Note: The field settings shown above are typical values for the LCM. Click the Browse button to select the new software image. Change the Device Key to GS7000. Set the Address Type to Unicast. Enter the Transponder IP address.

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    Chapter 3 Configuration Notes:  If available, refer to the MIB-Browser attribute dlActiveImageVersion in transponderImage or transponderTable for currently active Transponder image numbers.  Always download to inactive images. See additional notes below. 11 Set Startup Image to 1 or 2 as specified in step 10 above. (Startup Image is typically the same value as Download Image.) 12 Set Download Timeout to 300 (seconds).

  • Page 47: Chapter 4 Management Via Snmp

    SNMP v1 commands and sends SNMP v1 traps. In This Chapter  Introduction ................... 34  MIBs Used in the Optical Hub/Node ..........35  MIB-2 Specifications ................36  Cisco Proprietary MIB Specifications ..........39  HMS MIB Specifications ..............43 OL-29937-01...

  • Page 48: Introduction

    Chapter 4 Management Via SNMP Introduction SNMP is an ISO standard communication protocol often used by network and element management systems to monitor network devices for both alarms and other significant conditions. SNMP accesses information about network devices through management information base (MIB) objects.

  • Page 49: Mibs Used In The Optical Hub/node

    MIBs Used in the Optical Hub/Node MIBs Used in the Optical Hub/Node MIBs used in the GS7000 Optical Hub Node and Optical Hub are listed in the following table. A number of standard MIBs are added to the transponder core to support the addition of the EDFA and OPSW modules.

  • Page 50: Mib-2 Specifications

    The index into the entPhysicalTable for the Model GS7000 Node, GS7000 Optical Hub Node, and GS7000 Optical Hub is the slot number, starting with slot 1 and continuing through slot 11, inclusive. Since there is no slot 12 in the node or hub, entPhysicalIndex 12 represents the actual hub/node in which all the modules are contained.

  • Page 51

    The previous table lists valid equipment entries for entPhysicalDescr. However, "GS7000 EDFA Broadcast 17.0 dBm" is just one of several possible entries for an EDFA. All valid EDFA entries are listed in the following table. entPhysicalDescr entries for the EDFA GS7000 EDFA Broadcast 17.0 dBm...

  • Page 52

    The Hub/Node displays na. Module or Device Device Type or Model Type GS7000 EDFA 3100 Hub or Node GS7000 Optical Switch 4100 Power Supply Receiver Transmitter Status Monitor/LCM 2100 entPhysiccalAlias and entPhysicalAssetID are Read-Write.

  • Page 53: Cisco Proprietary Mib Specifications

    The following table shows GS7000 Node numbering conventions and slot numbers side-by-side. Also, in previous versions of the GS7000 transponder core module, "mount" and "unmount" could be set. With transponder core module image revision OHN_3.00.03 or greater, "mount" means that a transmitter is present and "unmount" means that a transmitter is not installed.

  • Page 54: Optical Receiver Table

    Also, in previous versions of the GS7000, transponder core "mount" and "unmount" could be set. With transponder core image revision OHN_3.00.03 or greater, "mount" means that a receiver is present and "unmount" means that a receiver is not installed.

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    Cisco Proprietary MIB Specifications saFnForwardConfig Description FCM Type oneX/twoXFwdSeg(1) Forward RF signal for 2 ports comes 1 x 2 from 1 optical receiver oneX/twoXFwdSeg(1) Forward RF signal for 2 ports comes 1 x 2 from 1 optical receiver or the redundant...

  • Page 56: Redundancy Control Table

    Chapter 4 Management Via SNMP Redundancy Control Table The saFnRedundancyControlTable consists of two elements: the index, saFnRedundancyControlIndex, and saFnRedundancyState. saFnRedundancyControlIndex displays 1 and 2. The first pair of receivers (Rx1 and Rx2 in slot 6 and 5) are represented by 1. The second pair of receivers (Rx3 and Rx4 in slot 4 and 3) are represented by 2.

  • Page 57: Hms Mib Specifications

    HMS MIB Specifications HMS MIB Specifications SCTE-HMS-PROPERTY-MIB The Property MIB consists of the following tables:  analog properties table  discrete alarms table  current alarms table Note: Information contained in the current alarms table can be determined by studying the other Property MIB tables. Analog Property Table The analog property table allows you to adjust certain alarm thresholds, hysteresis values, and settings with respect to alarm and trap generation.

  • Page 58

    Chapter 4 Management Via SNMP Equipment Parameter OID Thresholds Changed Code EDFA heOpAmpLaserTECCurrent Alarm Optical Switch heOpSwitchInputOpticalLevel Alarm Module in slot heCommonTemperature Alarm The following table indicates the default values for the analog properties table. Note: In the case of an EDFA, the specific module installed in the Hub/Node will govern the actual ranges for particular thresholds.

  • Page 59: Scte-hms-alarms-mib

    HMS MIB Specifications Discrete Property Table The discrete property table alerts you when a specific monitored value changes state. The alarms are set up to send a trap when a value changes from a nominal state to alarm state. Some are also set up to signal other states. The following table provides an overview of discrete property parameters and the values that may cause trap generation.

  • Page 60: Scte-hms-common-mib

    Chapter 4 Management Via SNMP Current Alarm Table Sample Instance currentAlarmOID currentAlarmAlarmState currentAlarmVal 18.1.3.6.1.4.1.5591.1.11.1.3. heOpAmpInputPower.9.1 caasLOLO(5) -242 1.1.2.1.2.9.1 Alarm Log Table Sample alarmLogIndex alarmLogInformation 34.AE.CC.90.05.19.12.2B.06.01.04.01.AB.57.01.0B.01.03.01.01.02.01.02.09.01.0 2.02.FF.0E In the preceding sample, the heOpAmpInputPower, with a numeric OID of 1.3.6.1.4.1.5591.1.11.1.3.1.1.2.1.2.9.1 or hexadecimal 2B.06.01.04.01.AB.57.01.0B.01.03.01.01.02.01.02.09.01, is in an alarm state of 5 (LoLo) with a value of -242 or FF.0E in hexadecimal.

  • Page 61: Scte-hms-download-mib

    SCTE-HMS-DOWNLOAD-MIB The SM module supports remote downloading application images to the transponder core, LCM module, and GS7000 EDFA and GS7000 OPSW modules by using the HMS Download MIB. Two download tables are helpful in determining which image to download. In the...

  • Page 62

    Chapter 4 Management Via SNMP Downloads to the EDFA and OPSW An EDFA or OPSW module can occupy any of the following slots: 3, 4, 5, 6, 8, 9, 10 or 11, which are also the device numbers for the download. A Power Supply is in slot 2, and the SM/LCM is in slot 7.

  • Page 63

    HMS MIB Specifications dlActiveImageVersion - This value contains the active image version number, such as "OHN_3.00.03" for the transponder core module. OID 1.3.6.1.4.1.5591.1.8.2.1.1.4 dlActiveImageDescription - The description of the module is the value for this OID, such as "SM/LCM" for the local control module. OID 1.3.6.1.4.1.5591.1.8.2.1.1.5 dlActiveImageAccess - Access to the active image is always "overwriteNotAllowed(2)."...

  • Page 64: Scte-hms-he-common-mib

    MIB. To disable the feature described, enter detectionDisabled(1). SCTE-HMS-HE-OPTICAL-AMPLIFIER-MIB The HMS optical amplifier MIB allows the user to monitor and control the GS7000 EDFA. Four tables are provided through this MIB: heOpAmpUnitTable ...

  • Page 65

    HMS MIB Specifications heOpAmpLaserTable The heOpAmpLaserTable has read-only access. Various elements are explained below. This instance represents the slot number in which the EDFA is installed as well as the heOpAmpLaserIndex. OID 1.3.6.1.4.1.5591.1.11.1.3.1.1.3.1.1 heOpAmpLaserTemp - The value of this OID gives the temperature of the amplifier laser in 0.1 degrees Celsius.

  • Page 66: Scte-hms-he-optical-switch-mib

    Chapter 4 Management Via SNMP This instance contains the slot in which the EDFA is installed as well as the heOpAmpOutputIndex. OID 1.3.6.1.4.1.5591.1.11.1.3.1.1.4.1.1 heOpAmpSetOpticalOutputPower -In order for a value in this OID to affect the EDFA, heOpAmpOutputGainType must be set to constantPower(1). The units of this value are 0.1 dBm.

  • Page 67

    A value is fault (2), if both input levels are below the nominal value. Otherwise, it is normal." OID 1.3.6.1.4.1.5591.1.11.1.4.1.1.1.1.6 heOpSwitchSelectWavelength - The wavelength in the GS7000 optical switch is always 155000 (1550 nm). Although this field has read-write access in the HMS MIB, the value will not change from 155000.

  • Page 68

    (2), if the input levels are not in the nominal range. Otherwise, it is normal (1). OID 1.3.6.1.4.1.5591.1.11.1.4.1.1.2.1.4 heOpSwitchInputDescription - The value of this OID for the GS7000 optical switch is either PathA or PathB. OID 1.3.6.1.4.1.5591.1.11.1.4.1.1.2.1.5 heOpSwitchOutputTable This section explains the implementation of the heOpSwitchOutputTable.

  • Page 69: Chapter 5 Troubleshooting

    Chapter 5 Troubleshooting This chapter contains instructions for troubleshooting SM/LCM operation. In This Chapter  SM/LCM Sensors and Indicators ............56  Local Control Module Troubleshooting ..........57  Status Monitor Troubleshooting ............60 OL-29937-01...

  • Page 70: Sm/lcm Sensors And Indicators

    Chapter 5 Troubleshooting SM/LCM Sensors and Indicators The SM/LCM housing contains a sensor and two indicators which provide the same indications whether the module is a local control module or a full status monitor. Note: See Status Monitor/Local Control Module Description (on page 8) for an illustration of the housing and indicators.

  • Page 71: Local Control Module Troubleshooting

    STATUS LED indications. WARNING: Model GS7000 Node or Hub Node forward segmentation is set at the factory to match the installed Forward Configuration Module (FCM). A mismatch between the forward segmentation and the FCM may cause isolation or loss of service.

  • Page 72

    WARNING: Model GS7000 Node and Hub Node forward segmentation is set at the factory to match the installed FCM. A mismatch between the forward segmentation and the FCM may cause isolation or loss of service.

  • Page 73: Red Fault Led Flashing Fast

    Local Control Module Troubleshooting Check which AC lines and PS modules are shown as installed in your  configuration. The configuration settings must match what is physically installed. Check the power supply measurements for out-of-range values.  Red FAULT LED Flashing Fast If the FAULT LED is flashing fast, one or both of the secondary receivers is being turned on, i.e., redundancy is in use.

  • Page 74: Status Monitor Troubleshooting

    Chapter 5 Troubleshooting Status Monitor Troubleshooting Introduction Like the LCM, the SM also indicates its status through the FAULT and STATUS LEDs on the front of the module housing. In addition, the SM transponder module has three more indicator LEDs that provide additional information about the remote connection, i.e., the transponder status.

  • Page 75: No Frequency Found State

    Status Monitor Troubleshooting STATE ERROR LED RECEIVE LED HEART BEAT LED (RED) (GREEN) (GREEN) Power-Up Constant Fast Flash No Freq Found (approx. 2 or 3 times/second) Double Flash/Pause Sequence Ch Description (2 flashes/second, then 1 second pause, repeat) Constant Slow Flash Registered (approx.

  • Page 76: Registered State

    Chapter 5 Troubleshooting Note: The SM could receive messages not intended for it. In this case, the SM discards the messages and stays in this state. This state indicates that the headend controller is not receiving data and is not registering the SM.

  • Page 77: Error State

    Status Monitor Troubleshooting Error State If the SM is in the "Error" state, then the transponder core module in the SM is defective. Replace the transponder core module or the entire SM as necessary. WARNING: Be sure that the LCM software and transponder core module software match. Software versions prior to 3.00.03 are not compatible with software versions 3.00.03 and above.

  • Page 79: Chapter 6 Customer Information

    Chapter 6 Customer Information If You Have Questions If you have technical questions, call Cisco Services for assistance. Follow the menu options to speak with a service engineer. Access your company's extranet site to view or order additional technical publications. For accessing instructions, contact the representative who handles your account.

  • Page 81: Glossary

    Glossary ampere. A unit of measure for electrical current. ac, AC alternating current. An electric current that reverses its direction at regularly recurring intervals. automatic frequency control. An arrangement whereby the tuning of a circuit is automatically maintained within specified limits with respect to a reference frequency. automatic gain control.

  • Page 82

    Glossary BIOS basic input/output system. blanking level The amplitude of the front and back porches of the composite video signal. The blanking level separates the range containing picture information from the range containing synchronization information. bits per second. The total number of bits sent in a second of time. bandwidth.

  • Page 83

    Glossary decibels relative to 1 watt. dc, DC direct current. An electric current flowing in one direction only and substantially constant in value. distribution system The part of a CATV system consisting of the transmission medium (coaxial cables, fiber optic cables, etc.) used to carry signals from the headend system to subscriber terminals.

  • Page 84

    Glossary electrostatic discharge. Discharge of stored static electricity that can damage electronic equipment and impair electrical circuitry, resulting in complete or intermittent failures. forward configuration module. frequency modulation. A transmission technique in which the frequency of the carrier varies in accordance with the modulating signal. frequency The number of similar shapes in a communications or electrical path in a unit of time.

  • Page 85

    Glossary hybrid fiber/coaxial. A network that uses a combination of fiber optics and coaxial cable to transport signals from one place to another. A broadband network using standard cable television transmission components, such as optical transmitters and receivers, coaxial cable, amplifiers, and power supplies.

  • Page 86

    Glossary management information base. SNMP collects management information from devices on the network and records the information in a management information base. The MIB information includes device features, data throughput statistics, traffic overloads, and errors. Newton meter. A measure of torque defined by the application of one Newton of force on a lever at a point on the lever that is one meter from the pivot point.

  • Page 87

    Glossary reverse path Signal flow direction toward the headend. radio frequency. The frequency in the portion of the electromagnetic spectrum that is above the audio frequencies and below the infrared frequencies, used in radio transmission systems. radio frequency interference. return material authorization. A form used to return products. router A data communications device which examines a packet and routes the packet to an output port appropriate to the packet destination.

  • Page 88

    Glossary status monitoring and control. The process by which the operation, configuration, and performance of individual elements in a network or system are monitored and controlled from a central location. torque A force that produces rotation or torsion. Usually expressed in lb-ft (pound-feet) or N-m (Newton-meters).

  • Page 89: Index

    C/N or CNR • 68 equalization • 69 Ch Description (Channel Description) State • 61 Error State • 63 Cisco Proprietary MIB Specifications • 39 ESD • 70 Closing the Housing • 17 Configuration • 19 Configuring the LCM • 20 Configuring the LCM Using the Auto-Setup FCM •...

  • Page 90

    • 40 MIB-2 System MIB • 36 SCTE-HMS-ALARMS-MIB • 45 MIBs Used in the Optical Hub/Node • 35 SCTE-HMS-COMMON-MIB • 46 Model GS7000 Hub/Node Description • 2 SCTE-HMS-DOWNLOAD-MIB • 47 SCTE-HMS-FIBERNODE-MIB • 46 SCTE-HMS-HE-COMMON-MIB • 50 Nm • 72...

  • Page 91

    Index SCTE-HMS-HE-OPTICAL-AMPLIFIER-MIB • SCTE-HMS-HE-OPTICAL-SWITCH-MIB • 52 SCTE-HMS-PROPERTY-MIB • 43 SM • 73 SM Configuration Parameters • 27 SM Transponder Module Indicators • 60 SM/LCM Sensors and Indicators • 56 SMC • 74 Status Monitor Configuration Procedure • 27 Status Monitor Description • 8 Status Monitor Troubleshooting •...

  • Page 92

    Fax: 408 527-0883 This document includes various trademarks of Cisco Systems, Inc. Please see the Notices section of this document for a list of the Cisco Systems, Inc. trademarks used in this document. Product and service availability are subject to change without notice.

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