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Coresma NeMo CMTS User Manual

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NeMo CMTS
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  • Page 1 NeMo CMTS User’s Guide...
  • Page 2 010804...

  • Page 3: Important Notice

    Copyright © 2001 Coresma, Ltd. NeMo CMTS, NeMo Modem are trademarks of Coresma Ltd. All other product names are trademarks or registered trademarks of their respective owners, and are hereby acknowledged.

  • Page 4: Safety Instructions

    Safety Instructions Caution! Risk of Electric Shock! Do not open the cover under any circumstances. Dangerous voltages inside. § No user serviceable parts inside. § Refer to qualified service personnel. § Explanation of Graphical Symbols: This symbol is intended to alert the user to the presence of non-insulated "dangerous voltage"...

  • Page 5: Environmental Conditions For The Nemo Cmts

    § Do not try to bend the box. § Environmental Conditions for the NeMo CMTS This unit must be installed in an office environment in a temperature-controlled § location where the temperature is between 0° and 40° Celsius, far away from rain, water sources, heat sources, inflammable liquids, inflammable vapors, dust and flammable materials.
  • Page 6 The CMTS was designed to work at heights between –200 meters below sea level § and to 2000 meters above sea level. If the CMTS is brought in from a cold place to a hotter place, condensation may § occur. Wait one hour before connecting to power. - iv -...

  • Page 7: About This Guide

    NeMo CMTS User’s Guide A b o u t T h i s G u i d e This guide describes how to prepare your site and install the NeMo CMTS system. It is intended for qualified engineers familiar with RF networks.

  • Page 8: Table Of Contents

    T a b l e o f C o n t e n t s ............................... MPORTANT OTICE .............................. AFETY NSTRUCTIONS Explanation of Graphical Symbols: ........................ii Environmental Conditions for the NeMo CMTS....................iii ................................ BOUT UIDE ..............................ABLE OF ONTENTS ................................1 NTRODUCTION About this chapter: ..............................
  • Page 9 NeMo CMTS User’s Guide ............................. 14 EADEND OFTWARE CMTS Embedded Code ............................15 ............................15 ABLE ODEM CM Controller ..............................16 Burst Transmitter ..............................16 Downstream IF Receiver ............................ 16 Tuner and Diplexer ............................. 16 Multiple MAC Modems ............................. 16 ................................
  • Page 10 .................................45 NTRODUCTION .................................45 EQUIREMENTS ..............................45 UTHORIZATION ..............................46 LOGIN ASSWORD ..............................46 HELL OMMANDS dir....................................46 cd .....................................46 show ..................................46 set ....................................46 help..................................46 quit..................................47 reboot ..................................47 write ..................................47 ls ....................................47 ..............................47 ONTROL ARIABLES Root directory ................................47 Service directory ..............................48 Upchan directory ..............................49 Freq_hopp_table directory...........................51 Downchan directory ............................51 CMTS directory ..............................52 mgmt directory ..............................54...
  • Page 11 NeMo CMTS User’s Guide IP messages handling ............................72 ARP messages handling............................72 DHCP messages handling ..........................72 DHCP Block Mode .............................. 72 MAC A ....................73 ULTI UTHENTICATION MPLICATIONS MAC F ......................73 ULTI ORWARDER MPLICATIONS ..............................74 LOSSARY OF ERMS ............................

  • Page 13: Introduction

    § NeMo CMTS The NeMo CMTS resides at the headend and provides up to a 10Mbps connection for high-speed delivery of Internet content and other on-line services. The main objective of the NeMo CMTS is to emulate an Ethernet LAN over a cable television network, and connect subscribers' PCs and local servers via an IP router.

  • Page 14: Management Software

    The NeMo CMTS features: Excellent performance in noisy networks § Flexible installation and configuration § Ideal solution for MDUs, hotels, and campuses § Rack mount or stand alone design § Management Software The FOCS management software resides at the headend and provides the services of a...
  • Page 15 NeMo CMTS User’s Guide Initiates alarms § Downloads software upgrades § NeMo Modem The NeMo modem is a compact, user-friendly modem designed to suit the access needs of subscribers. Designed to plug and play, it does not require any software installation or preset attenuation.

  • Page 16: Nemo Cmts Diagram

    NeMo CMTS Diagram - 4 -...

  • Page 17: Overview

    NeMo CMTS distributes the Internet and other online services within the network. The NeMo CMTS has no distance limitations. It can be placed at a node in a neighborhood building, hotel basement or campus.

  • Page 18: How The Cmts Works

    NeMo modem, based on demand, priority and system resources. The design of the NeMo CMTS originates from its simplicity, scalability and management. With robust upstream and downstream QPSK modulation, system auto software download, auto attenuation, upstream techniques, and remote management, it can successfully operate in today's noisiest networks.

  • Page 19: Nemo Headend Unit

    NeMo Headend Unit The NeMo CMTS remotely manages all NeMo modems. The CMTS tracks and monitors the NeMo modems and network performance, collects performance and billing statistics, enables authorization of all users, assigns QoS, runs diagnostics, initiates alarms and downloads software upgrades.

  • Page 20: Configuring The Cmts

    (CMTS?). The CMTS connects to one downstream modulator and one upstream § demodulator. (this is not a feature) The NeMo CMTS separates the RF modules from the host (what is the host?), § which enables better signal quality. Architecture Architecture flexibility to operate using NT or Unix OS §...

  • Page 21: Installation Features

    NeMo CMTS User’s Guide Modem's plug and surf capabilities enable system to automatically download § modem software. Auto attenuation enables the headend to attenuate all modems in network. § SNMP management system enables diagnostics, troubleshooting, early warnings § and network alarms.

  • Page 22: System Architecture

    IP Router: enables communication from the cable network to and from the outside world and the Internet. NeMo CMTS. The NeMo CMTS is the RF bridge that handles downstream and upstream termination. The CMTS consists of one downstream QPSK burst transmitter of 10Mbps and 1 to 2 upstream burst QPSK receivers.

  • Page 23: System Connectivity

    TFTP Server. The TFTP server application is used to auto-update the CMTS and modem software. The TFTP server can be installed on the CATV Ethernet backbone or anywhere on the Internet network. System Connectivity The following diagram illustrates the connections and data flow of the NeMo CMTS System. - 11 -...
  • Page 24 The upstream connection to the NeMo CMTS from the end-user site requires a signal power of between 0 to - 4 dBmV. The IF Agile Modulator connects to the NeMo CMTS and converts the RF frequencies IF input to the correct channels’ frequencies output.

  • Page 25: Headend Hardware

    TV, and the other cable is connected to the NeMo modem. Headend Hardware The NeMo CMTS can be configured as a desktop unit on a shelf or tabletop, or it can be placed in a 19-inch rack. The CMTS contains various LEDs, which enable it to be easily monitored.

  • Page 26: Rf Burst Receiver

    RF Burst Receiver In the CMTS, a software controlled QPSK receiver for burst transmission receives signals in the range of 5-65 MHz, depending on the symbol rate, in the power range of –7 dBmV up to +23dBmv for Burst QPSK Bit Rate of 2.56 Mbps and –4 dBmV up to +26dBmv for Burst QPSK Bit Rate of 5.12 Mbps, with maximum ±...

  • Page 27: Cmts Embedded Code

    NeMo CMTS User’s Guide CMTS Embedded Code Two separate codes are stored in the CMTS. The first code stored in the CMTS is the CMTS Boot Code. This code tells the CMTS how to boot and how to utilize the TFTP protocol.

  • Page 28: Cm Controller

    The Tuner and Diplexer can be monitored and controlled by the CMTool software provided to the cable operators' technicians. Multiple MAC Modems The modem supports up to 4 IP address machines connected via a HUB. Applications The following diagrams represent possible applications for the NeMo CMTS system: - 16 -...

  • Page 29: System Without Management

    NeMo CMTS User’s Guide System Without Management Serial Terminal Router RF Network Internet Bridge System With Management Serial Terminal • Rlogin • • Router RF Network Remote Internet Bridge • Rlogin • • Management applications: RLOGIN: Used to remotely configure the CMTS and set its NVRAM parameters.

  • Page 30: Site Preparation

    Overview In order to install the NeMo CMTS system, you must ensure that the environment in which you plan to install the system contains all the necessary hardware and software components. You will also need to prepare a management computer, prepare your RF network, prepare a configuration drawing of the system and installation topology, and prepare an end-user test site in your local environment.

  • Page 31: Basic Configuration

    The basic configuration of the NeMo CMTS system consists of: One NeMo CMTS § One computer containing management software § NeMo modems connected through the RF network § The diagram below illustrates the relationship between the NeMo CMTS and your computer. - 19 -...
  • Page 32 The NeMo CMTS is configured from the computer using different protocols that enable it to communicate with the CMTS: Serial Monitor (HyperTerminal) §...

  • Page 33: Preparing The Headend Site

    FOCS is used for subsequent configurations. Preparing the Headend Site The headend site refers to the environment in which the NeMo CMTS system is to be installed. At the headend site you must do the following: Prepare the Management Computer §...
  • Page 34 Software Microsoft NT 4.0 § SNMP Service enabled Internet Information Server (IIS) enabled TCP/IP enabled NT 4.0 Service Pack 5 § NT 4.0 Option Pack 4 § Microsoft SQL Server 7 § Microsoft Internet Explorer 5 § TFTP Server § Initialization Service The initialization service enables you to perform first time setup of the CMTS.

  • Page 35: Preparing The Rf Network

    10 Base-T cables to connect the CMTS to the Router or LAN § Preparing the RF Network After the management computer has been prepared, you can make your RF network compatible with the NeMo CMTS system. This section assumes that your cable network - 23 -...
  • Page 36 An Agile Modulator Up Converter is required to transform signals from the IF range to the RF range. The Agile Modulator should support European (PAL) and US (NTSC) signals. The Modulator specs must then be faxed to Coresma for approval. See Chapter 4, Contacting Coresma.

  • Page 37: Preparing The Ethernet Network Parameters

    § Internet Router Information An Internet router is needed for layer 3 routing of IP packets between the NeMo CMTS and the Internet. The router is also required in case the TFTP server is located in an IP segment that is different from the segment of the CMTS. Ensure that you have the...

  • Page 38: Preparing A Local End-User Site

    As part of the installation process you will prepare a local, end-user test site at your location. This process will allow you to ensure that the NeMo CMTS system that you installed is operational. A computer with the following hardware and software is...

  • Page 39: Installation Configuration

    26, for instructions on how to test if you have an active Internet connection. Installation Configuration In order for the Coresma engineer to prepare for the installation process, please answer the questions and sketch the diagrams described in the Setup Questionnaire on the next page and email or fax the requested information to Coresma.

  • Page 41: Installing The N E M Ocmts

    Modem and set up an end-user test site at your location. Part 1: Setting Up the CMTS and Modulator Connection The first part of the installation process is to set up the NeMo CMTS and modulator. This requires the following steps: Connecting the CMTS and the Modulator §...
  • Page 42 One NeMo CMTS § One agile modulator § Four RF cables § Attenuators (at least 20 dBmV) § Step 1. Attaching the CMTS and Modulator Attach the CMTS and modulator to a standard 19" rack or place them on your desktop.

  • Page 43: Calibrating The Rf Signals And Connecting To The Rf Network

    NeMo CMTS User’s Guide Note: The attenuation process ensures that the modulator receives the appropriate signal. The modulator should receive a signal of 8 - 15 dBmV. The CMTS gives out the following signals: PAL: 36.15 MHz in 30 dBmV NTSC: 43.5 MHz in 30 dBmV...
  • Page 44 To attenuate the Downstream Signal: Connect the downstream cable to the RF-OUT connector on the modulator. Establish a serial connection between the CMTS and your computer, through the COM 1 or COM 2 port using a serial cable. You will need to use HyperTerminal to connect using the serial connections as well.
  • Page 45 NeMo CMTS User’s Guide Disconnect the spectrum analyzer and connect the IF-OUT connector on the CMTS to the IF-IN connector on the modulator. Connect the spectrum analyzer to the RF-OUT connector on the modulator, and ensure proper signal shape and level readings on the analyzer, (with a minimum SNR of 20dB).
  • Page 46 Determine which RF frequency is coming out of the modulator by referring to § the modulator channel chart. You will need to add 2.75 in PAL and 1.75 in NTSC to the number that you have in order to reach the center of the signal. This will be burned into the modem, as described on page 31.

  • Page 47: Part 2. Setting Up The Management Computer(S)

    CMTS. This includes: TFTP Server: Enables you to auto-update the CMTS and modem software. § FOCS: enables the system operator to monitor and control the NeMo CMTS § system, both online and offline.

  • Page 48: Configuring The Cmts For The First Time: Cmts Configuration

    Configuring the CMTS for the First Time: CMTS Configuration First time configuration of the CMTS must be done using the HyperTerminal in order to connect the CMTS, management computer and router. Subsequent configurations of the CMTS can be done more easily using the FOCS as described in the next section. The following steps are required: Connecting the CMTS to the Management Computer Configuring the CMTS...
  • Page 49 NeMo CMTS User’s Guide You are now ready to connect the CMTS to the management computer and router. Step 2. Configuring the CMTS. Turn the CMTS power ON. At this point you should see some activity in the HyperTerminal. After this activity stops, you will see the Boot> prompt and...
  • Page 50 This shell enables you to accurately input first time data into your CMTS. Type Help and press <Enter>. A list of the available commands is displayed, as shown in the example below: - 38 -...
  • Page 51 NeMo CMTS User’s Guide Next, you will set a few parameters for the CMTS to connect to the management computer and load runtime files. Type Show and press <Enter> to view the NVRAM variables, which enable you to verify the configuration parameters, as shown below: In order to change a parameter, the following syntax is required: set <parameter name >...

  • Page 52: Configuring The Cmts Using Focs

    Coresma Software CD, on the same computer that the TFTP server is installed. After you setup the CMTS the first time using HyperTerminal, you will use FOCS Client for all future contact with the NeMo CMTS system. Please refer to the FOCS, manual for further instruction.

  • Page 53: Part 3: Setting Up An End-User Site

    NeMo CMTS User’s Guide Part 3: Setting Up an End-User Site After you have successfully completed setting up the headend site, you are ready to connect the NeMo modem to an end-user’s computer and setup an end-user test site. This test is usually performed using a dedicated computer at your location.

  • Page 54: Installing And Using The Nemo Tool

    Connect the other end of the RF cable to the CATV inlet or the RF splitter. Installing and Using the NeMo Tool The NeMo Tool is located on the Coresma Software CD and enables you to configure the modem with the correct frequency information necessary to contact the CMTS.
  • Page 55 NeMo CMTS User’s Guide On the end-user computer, install the NeMo Tool by opening the folder named NeMo tool and clicking on the setup.exe file. To use the NeMo Tool: . The NeMoTool dialog box is displayed: Open the NeMo Tool For a complete description of the tab options available in the NeMo Tool, refer to the Chapter XX.
  • Page 56 In this window, make sure that the frequencies you have chosen are correct. Now that the modem is successfully connected to the system, try to ping the server. Congratulations, you have just successfully installed your NeMo CMTS system! - 44 -...

  • Page 57: Rl Ogin Commands

    The NeMo CMTS RLogin Shell displays a Bridge> prompt when it is waiting for you to enter a command. (The actual text depends on the current directory).

  • Page 58: Rlogin Password

    Rlogin Password When using Rlogin client to connect to the CMTS, both User Name and Password entries must be entered. The User Name must be "Admin"; the password is configurable. The default is "Admin". Refer to Cmts directory on page 52 for instructions on Rlogin password configuration.

  • Page 59: Quit

    Note: Without arguments will display a list of all available commands. quit Terminate rlogin session. Purpose: quit Format: reboot Causes the NeMo CMTS's boot ROM to restart the boot sequence. Purpose: reboot Format: write Store the NVRam data. Purpose: write Format: See dir.

  • Page 60: Service Directory

    software_version Description: Software version of the currently running program image. Access: Read Example: Bridge> show software_version fdp_version Description: Software version of the modem. Access: Read Example: Bridge> show fdp_version Service directory total_data_slots Description: Total number of slots used by the given sid. Access: Read Example:...

  • Page 61: Upchan Directory

    NeMo CMTS User’s Guide Upchan directory slot_size Description: Data slot size (in time ticks). Access: Read, Write Valid values: 8-10 Example: Bridge\upchan> show slot_size Bridge\upchan> set slot_size 9 symbol_rate Description: Upstream symbol rate. Accepted values: Access: Read, Write Valid values: 0 for 2.56Mb/s, 1 for 5.12Mb/s.
  • Page 62 limits is called an allowed signal level window. The signal_wnd_size is half the difference between the upper and lower limits. Valid values: 2 to 6 dB. Access: Read, Write Example: Bridge\upchan> show signal_wnd_size Bridge\upchan> set signal_wnd_size 2 min_attn_lvl Description: Cable modems upstream signal level is affected by the upstream symbol rate and the internal - software controlled attenuator.

  • Page 63: Freq_Hopp_Table Directory

    NeMo CMTS User’s Guide burst_length Description: Burst length in symbols. Access: Read, Write Example: Bridge\upchan> show burst_length Bridge\upchan> set burst_length 1028 frame_corr_thresh Description: If upstream error percentage is larger than this threshold then upstream error correction is enabled. When this value is 0, upstream error correction is always enabled, when 100, upstream error correction is always disabled.

  • Page 64: Cmts Directory

    spectrum_inversion Description: Spectrum inversion Access: Read, Write Valid values: 0 – 3 Example: Bridge\downchan> set spectrum_inversion 3 Bridge\downchan> show spectrum_inversion sym_rate Description: Downstream symbol rate. Valid values: 0 - 6.82 Mb/s; 1 - 9.45 Mb/s. Access: Read, Write Example: Bridge\downchan> show sym_rate Bridge\downchan>...
  • Page 65 NeMo CMTS User’s Guide use_8021q Description: If this parameter is enabled the bridge will use the IEEE 802.1Q protocol for all upstream received from modems. Every Up stream packet transmitted to bridge Ethernet side with the 802.1q header where 12 LSB of the modem serial number is the VLAN ID of this packet.

  • Page 66: Mgmt Directory

    restrict_ds Description: When this parameter is enabled, only frames received from the bridge gateway will be processed. Downstream can be restricted in a way that only frames received from the router will be forwarded to the cable network. This is done using the restricted_ds parameter.

  • Page 67: Stats Directory

    NeMo CMTS User’s Guide Instruction: Set the rlogin_pwd string by entering the desired password twice. If the desired password is "secret" the command should be: Example: Root\cmts> set rlogin_pwd secretsecret Important Note: The password is case sensitive and its length should not exceed eight characters.
  • Page 68 out_bytes Description: Total number of bytes transmitted downstream. Access: Read Example: Bridge\stats> show out_bytes in_bytes Description: Total number of incoming bytes. Access: Read Example: Bridge\stats> show in_bytes in_rejects Description: Number of upstream packets received, but rejected. Access: Read Example: Bridge\stats> show in_errors in_errors Description: Number of upstream packets refused due to CRC errors.

  • Page 69: Ip_Cfg Directory

    NeMo CMTS User’s Guide tx_maps Description: Total number of maps sent by the bridge. Access: Read Example: Bridge\stats> show tx_maps tx_ucds Description: Total number of number of upstream channel descriptors sent by the bridge. Access: Read Example: Bridge\stats> show tx_ucds...

  • Page 70: Boot_Cfg Directory

    Access: Read, Write Bridge\ip_cfg> show dns_addr Example: Bridge\ip_cfg> set dns_addr 100.100.100.120 Boot_cfg directory boot_config Description: Access: Read, Write tftp_addr Description: The TFTP Server's IP address. Access: Read, Write Example: Bridge\ip_cfg> show tftp_addr Bridge\ip_cfg> set tftp_addr 100.100.100.120 tftp_path Description: The TFTP Server's working directory. Access: Read, Write Example:...
  • Page 71 NeMo CMTS User’s Guide qos_status Description: Quality of service status. Access: Read, Write Valid values: 0 - disabled, 1 - enabled, 2 - fixed Bridge\radius> show qos_status Example: Bridge\radius> set qos_status 2 down_qos_fixed_min Description: Minimum fixed downstream QoS in Kbytes/sec.
  • Page 72 auth_policy Description: Sets an authentication policy. Valid only when radius is enabled for authentication (radius_status set 1 or 3). Valid values: 1 - authentication by client MAC address, 2 - authentication by modem serial number, 3 - authentication by client MAC address and IP address. 4 - authentication by IP.
  • Page 73 NeMo CMTS User’s Guide shared_secret Description: 16 symbols max, no spaces allowed. The shared secret MUST be set at the RADIUS client and Server. Transactions between the client and RADIUS server are authenticated through the use of a shared secret, which is never sent over the network.

  • Page 74: Cm Operation Mode Directory

    Source bridge MAC address § Event description § An example of a valid SYSLOG UDP payload could be: <134>000200120202 Modem Operator Disconnect Event AC:00-E0-4C-DD-23-53 KEY:00-00-FF-FF-FF-FF IP=194.90.44.206 ATTN=14 srs_ip Description: The IP Address of the SRS WEB Site. Access: Read, Write Bridge\radius>...
  • Page 75 NeMo CMTS User’s Guide Bridge\cm_operation_mode> set serial_mac_rep_mode 0 Note: This feature cannot work together with any RADIUS authentication. In order for this feature to work properly, RADIUS authentication must be disabled. Changing this mode status can be done on run time, However it is strongly recommended to reset the Bridge after an update.
  • Page 76 netbus_block_mode Description: When enabled all traffic carrying TCP /UDP with destination port 12345 or 31337 will be dropped. Set netbus_block_mode 1 or 0 to block (1) or not (0) NetBEUI ports. Access: Read/Write. Example: Bridge\cm_operation_mode> show netbus_block_mode Bridge\cm_operation_mode> set netbus_block_mode 0 arp_use_dhcp_gw Description: ARP bridge refreshes is sent now by default to the bridge gateway.

  • Page 77: Net Hotel

    NeMo CMTS User’s Guide PPENDIX N e t H o t e l The following is a list of NetHotel parameters that are available for NetHotel applications. Nat/Settings Directory ip_pool_start Description: First IP address in Nat address pool. Values: Any valid IP address. Nat address pool should be separated from DHCP pool in the net.
  • Page 78 fw_active_sessions Description: The number of active sessions registered by the firewall (Nat). Access: Read Example: Bridge\nat\settings> show fw_active_sessions fw_status Description: The firewall (Nat) status. Values: 0 (off) - the firewall (Nat) is not operating 1 (initializing) - the firewall (Nat) is on its initial mode, NOT connected to the PS1 (this value cannot be set) 2 (connected) - the firewall (Nat) is on, and connected to the PS 3 (disconnected) - the firewall (Nat) is on, was connected to the PS...
  • Page 79 NeMo CMTS User’s Guide fw_ps_disc_timeout Description: Firewall (Nat) uses this number seconds to decide whether the PS connected. If the last time the PS contacted the firewall (Nat), is passed by more time that this time out, than the firewall (Nat) decides it's disconnected from the PS and it changes the firewall (Nat) status so all sessions will be allowed to connect to the Internet.

  • Page 81: B O O T Parameters

    NeMo CMTS User’s Guide PPENDIX B o o t P a r a m e t e r s The following is a list of Boot parameters that are available during the boot sequence of the Bridge. During the boot sequence you can stop the boot process in order to change or view boot parameters.
  • Page 82 Parameter Value Description located on the working directory. TFTP server, which will store the relevant files. (c:\nemo_sa) autoupdate 0 / 1 Set to 1 to enable boot flash update; set to 0 to disable it. validbootima 0 / 1 Set to 0 to inhibit booting program image stored in additional flashes.

  • Page 83: Multiple Mac Modems

    PPENDIX M u l t i p l e M A C M o d e m s Preface The new NeMo (NeMo-E_imp) can support up to 4 PCs (or any other IP devices e.g. IP telephone etc.). The PCs and the modem are all connected to a HUB (The modem should use a crossed cable).

  • Page 84: Mac Address Translation

    MAC Address Translation IP messages handling The modem analyses the traffic and learns the IP addresses and MAC addresses of the PCs on the HUB. The modem maintains an ARP table of the PCs and keeps a shadow of this ARP table on its NVRAM. When an IP frame is received by the modem on the down stream the modem searches its ARP table using the Destination IP and replaces back the Ethernet Destination address (which is now the modem Serial-MAC) to the original MAC address.

  • Page 85: Multi Mac Authentication Implications

    NeMo CMTS User’s Guide for the given Lease Time. ARP messages that their Sender IP wasn’t received in a DHCP response will be dropped. Multi MAC Authentication Implications Every new modem works in the ‘Multiple MAC’ mode. Thus the PC’s MAC address is not used for the authentication.

  • Page 86: Glossary Of Terms

    PPENDIX G l o s s a r y o f T e r m s This appendix describes some of the terminology used in the NeMo CMTS User's Guide. NeMo Coresma's cable modem. § Operator Cable TV operator. §...
  • Page 87 NeMo CMTS User’s Guide Database A collection of information, data tables, and other objects that are organized and § presented to serve a specific purpose, such as facilitation of searching, sorting, and recombination of data. Databases are stored on devices such as hard disks.

  • Page 88: Technical Specifications

    T e c h n i c a l S p e c i f i c a t i o n s The technical specifications provided below are for reference purposes only and may be subject to change. NeMo CMTS Operation Dimensions Width: 435mm, 19"...

  • Page 89: Nemo Modem

    NeMo CMTS User’s Guide Power Range +30 dBmV to +57 dBmV ± 1.5 dB Power Accuracy On/Off Ratio 75 dBc Receiver Specifications Frequency Range 5 to 42 MHz Bandwidth 1.8 MHz/2.5 Mbps 2.8 MHz/5.12 Mbps Input Signal Min: -17 dBmV Level 2.56...
  • Page 90 Spur Energy 80 dBc Modem Off Discrete Spurs 60 dBc Modem On Installation and Operating Environment Horizontal Desktop Mounting Dimensions 40mm H x 180mm W x 160mm D Weight 700 gr. (1.5 pounds) Fan-less Operation Operating 0° to 40°C (32° to 104° F) Temperature Installation and Operating Environment (cont.) Storage...

  • Page 91: Contacting Coresma

    NeMo CMTS User’s Guide Contacting Coresma Coresma is committed to customer service and product support. To assist you in the use of its products, we provide support services that allow you to report software problems, to receive patches and updates, as well as to obtain product information.

  • Page 92: Index

    Initialization Service ........22 Connecting CMTS ........29 Installing PPTP..........71 Connecting Modulator ......29 Internet Router ..........25 Contacting Coresma ......... 79 Internet Router Information ....25 Control Variables ........47 IP address............25 DHCP Server..........25 IP Address ............ 39 DNS Server IP Address ......
  • Page 93 46 Management Software .......2 dir............... 46 Modem Code..........7 help..............46 Nat/Settings directory ......65 ls 47 NeMo CMTS ........5, 6, 19 quit..............47 NeMo Modem ........3, 41 reboot ..............47 Installation ............42 set ............... 46 Technical Specifications ......77 show..............

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