Instruction/ maintenance manual of the product CDM-570 Comtech EF Data
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Vipersat CDM-570/570L Satellite Network Modem Router User Guide Part Number 22125 Revision 2.0.
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Vipersat CDM-570/570L Version 1.5.3 User Guide May 12, 2006 Part numbe r 22125 Document Revision 2.0 Firmware Ve rsion 1.5 .3.
Comtech VIPERSAT Networks, Inc. 3215 Skyway Cou rt Fremont, CA 94539 USA Phone: (510 ) 252-1462 Fax: (510) 252-1695 www.vipersat.com Part Number 22125 Manual Revision 2.0 Firmware Version 1.5.3 ©2006 by Comtech VIPERSAT Networks, Inc. All rights reserved.
Document Revision Status The information contained in this document is subject to change without notice or obligation. Although CVNI has made every effort to verify the content of this document, CVNI assumes no responsibility for liability due to errors that may appear in this document.
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i General How to Use This Manual . . . . . . . . . . . 1-1 Manual Organization . . . . . . . . . . . . 1- 1 Chapter 1 — General . . . . . . . . . 1-1 Chapter 2 — Qui ck Start Configuration 1-1 Chapter 3 — Using the Command Line Interface (CLI ) .
ii Vipersat CDM-570/ 570L User Guide Slot S tart in Cycle . . . . . . . . . . . 3-15 Set Remotes . . . . . . . . . . . . . . 3-15 Adding a Remote to the STDMA Group . 3-15 Base . . . . . . . . . . . . . . . . . 3-16 Remote Count . . . . . . . . . . . .
iii Load Switching . . . . . . . . . . . . . . . . B-2 Bandwidth Allocation and Load Switching by the STDMA Controller: . . . . . . . . . B-2 Load Switching Process . . . . . . . . . B-6 Load Switching by a Remote . . . . . . B-6 Determining Need-for-C hange .
iv Vipersat CDM-570/ 570L User Guide.
v Chapter 2 Figures Figure 2-1 Main Menu screen. . . . . . . . . . . . . . 2-5 Figure 2-2 Administration screen . . . . . . . . . . . 2-5 Figure 2-3 Feature Configuration scre en . . . . . 2-6 Figure 2-4 Feature and Unlock Code dia log. . . 2-6 Figure 2-5 Working Mode dialog .
vi Vipersat CDM-570/ 570L User Guide Figure 3-61 Home State Configuratio n screen 3-44 Figure 3-62 Force Modem to Home State warning 3-45 Figure 3-63 Transmit Freq uency prompt . . . . 3-45 Figure 3-64 Transmit Data Rate prompt . . . . . 3-46 Figure 3-65 Transmit FEC Type prompt .
Chapter 1 - General 1-1 C HAPTER G ENERAL How to Use This Manual This manual documents the enhanced Vipersat features and functions of the CDM-570/570L Satellite Network Modem Router, and guides the user in how to configure this product for use in a Vipersat network.
How to Use This Manual 1-2 Vipersat CDM-570/570L User Guide Chapter 3 — Using the Co mmand Line In terface (CL I) Describes the use of the CLI for configuring and monitoring the CDM-570/ 570L in a Vipersat network. Each CLI screen is pre sented along with a detailed description and related co mmands.
Chapter 1 - General 1-3 How to Use This Manual The following documents are referenced in this manual, and provide supple- mentary information for the reader: • CDM-570/570L Mode m Installation and Operation Manua l (Part Number MN/CDM570L.
Product Description 1-4 Vipersat CDM-570/570L User Guide Product Description Introduction The Vipersat CDM-570 and CDM-570L (L-band) Satel lite Network Modem Routers offer state of the art performance and reliability in a sophisticated and cost-effective 1RU package.
Chapter 1 - General 1-5 Product Description • Multi-Transponder Mode (MTM) Functions • Dynamic Power Control (DPC) for Environment or Mesh Links • Upstream Bandwidth Management Switching for App.
Product Description 1-6 Vipersat CDM-570/570L User Guide T urbo Product Coding The Comtech Vi persat CDM-570/570L incorp orates a Turbo Product Codec (TPC). TPC is a FEC technique that delivers significant performance improve- ment when compared to Viterbi with concatenated Reed-Solomon.
Chapter 1 - General 1-7 Product Description 1.5.3 Release New Redundanc y Features Redundancy Heartbeat Message for Primary Hub Units Provides the option for a periodic communications check message to be sent from the Hub modem to the VMS for backup recovery in N:M redundancy (protected) configurations.
Product Description 1-8 Vipersat CDM-570/570L User Guide modem parameters are now preserved ac ross firmware upgrades and re boots, eliminating a potential cause of communications failure.
Chapter 1 - General 1-9 Customer Support Customer Support Cont act Information Contact Comtech Vipersat Network s Customer Support for inf ormation or assistance with product su pport, service, or train ing on any Vipersat prod uct.
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Chapter 2 - Quick Start Configuration 2-1 C HAPTER Q UICK S TA R T C ONFIGURATION Introduction This chapter describes the minimum configuration of a Vipersat CDM-570/ 570L Modem/Router that is necessary in order for the equipment to function in a Vipersat network.
Introduction 2-2 Vipersat CDM-570/570L User Guide Caution: Do no t connect the TX and RX cables to test equipment without the use of a DC voltage block. If BU C or LNB p ower is disab led through the CLI, the setting must be Saved to prevent accide ntal re-enabling during modem reboot or power-cycle.
Chapter 2 - Quick Start Configuration 2-3 Initial Configuration Initial Configuration Note: Many of the settings required for equipment co nfiguration are ba sed on the LAN/WAN and Satellite network design, and should be obtained from the net work adm inistrator.
Initial Configuration 2-4 Vipersat CDM-570/570L User Guide Setting V ipersat CDM-570/570L Operating Parameters The following is an example of using the CL I to bring a Vipersat CDM-570/ 570L with factory default settings to the configuration which allows the Viper- sat functions to be accessible.
Chapter 2 - Quick Start Configuration 2-5 Initial Configuration Figure 2-1 Main Menu screen 2. From the Administration screen shown in figure 2-2, select the Features Configuration command by entering F at the command prompt. Figure 2-2 Administration screen 3.
Initial Configuration 2-6 Vipersat CDM-570/570L User Guide Figure 2-3 Feature Configuration screen Figure 2-4 Feature and Unlock Code dialo g Tip: The network administrator will hav e the feature and unlock codes. Thes e are stored by the MAC address for the target CDM- 570/570L.
Chapter 2 - Quick Start Configuration 2-7 Initial Configuration 6. Save the settings to flash by entering S at the comman d prompt. 7. Enter X at the command prompt to exit the Feature Config uration menu and return to the Administration screen. 8. Ensure that the Working Mode is set to Route r-Vipersat .
Initial Configuration 2-8 Vipersat CDM-570/570L User Guide Configure the Route T able Routing i n a Vi persat Networ k CDM-570/570L mode m/routers operating in Vipersat m ode do not use the small or large network described in the CDM-570/570L Installation and Opera - tion Manual .
Chapter 2 - Quick Start Configuration 2-9 Initial Configuration that must be created is a gateway address for routing the data traffic that is received by the unit. 1. From the Main Menu shown in figure 2-1, select Route Table by entering R at the command prompt.
Initial Configuration 2-10 Vipersat CDM-570/570L User Guide If this Hub unit is providing t he TDM outbound, a route statement or state- ments defining satellite communications wi th the Remote units must be entered as well.
Chapter 2 - Quick Start Configuration 2-11 Initial Configuration Set the V ipersat Configuration 1. Enter V at the Main Menu command prompt shown in figure 2-1 to select the Vipersat Configuration menu shown in figure 2-8. Figure 2-8 Vipersat Configuration screen (Hub) 2.
Initial Configuration 2-12 Vipersat CDM-570/570L User Guide 6. Enter V at the command prompt to set the Receive Multicast Address . The Receive Multicast Address is the multicast IP address assigned to the VMS and to all units in the network.
Chapter 3 - Using the Command Line Interface (CLI) 3-1 C HAPTER U SING THE C OMMAND L INE I NTERFACE (CLI) General This chapter describes the use of the CLI for configuring and monitoring the CDM-570/570L Modem Router in a Vipersat n etwork.
General 3-2 Vipersat CDM-570/570L User Guide not applied. However, if these changes are not saved prior to a system reset or power cycle, they will be lost. Exit To Exit the current menu screen and return to the previo us screen in the menu tree, enter X at the command prompt.
Chapter 3 - Using the Command Line Interface (CLI) 3-3 Menu Descriptions Menu Descriptions This section details the CLI command menus and briefly discusses the function of each of the commands available on ea ch menu. Main menu The Main Menu , shown in figure 3-1, allo ws configuring both the mo dem and router functions of t he target CDM-570/570L.
Menu Descriptions 3-4 Vipersat CDM-570/570L User Guide Figure 3-2 Administration screen Enter an F at the prompt to display the Feature Configuration screen shown in figure 3-3.
Chapter 3 - Using the Command Line Interface (CLI) 3-5 Menu Descriptions The Feature Configuration screen shown in figure 3-3 allows enab ling and disabling CDM-570/57 0L features.
Menu Descriptions 3-6 Vipersat CDM-570/570L User Guide Vi p e rs at S T D M A In order to utilize the Vipersat STDMA feature in the target Vipersat CDM-570/ 570L, this feature must be enab led.
Chapter 3 - Using the Command Line Interface (CLI) 3-7 Vipersat Configuration V ipersat Configuration Enter V at the command prompt f rom the CDM-570/570L Main Menu shown in figure 3-1 to display the Vipersat Configuration screen shown in figure 3-5.
Vipersat Configuration 3-8 Vipersat CDM-570/570L User Guide Figure 3-6 STDMA screen (Hub, Dynamic Cycle type) Figure 3-7 STDMA screen (Rem ote) STDMA This menu item is read-only and shows the current state of STDMA in the CDM-570/570L.
Chapter 3 - Using the Command Line Interface (CLI) 3-9 Vipersat Configuration STDMA Tx Rate This menu item shows the STDMA transmit rate in bps. This item is read-only and cannot be modified in this menu. Hub T ype This menu item is only displayed if the CDM-570/570L is being used as a Hub in the network.
Vipersat Configuration 3-10 Vipersat CDM-570/570L User Guide 1 -- Fi xed In the Fixed mode, all remotes have the same slot size re gardless of type of traf- fic or load. 2 -- Dynami c Slot In the Dynamic Slot mode, the slot size for each remote is computed based on the time (at the current data rate) needed to transmit al l the Bytes in Queue.
Chapter 3 - Using the Command Line Interface (CLI) 3-11 Vipersat Configuration This mode is designed to accommodate the needs of a remote which will not be continuously connected to the network, but which has the need to be able to make an o n-demand co nnection when required, s uch as a mob ile remote.
Vipersat Configuration 3-12 Vipersat CDM-570/570L User Guide group. The burstmap is a proprietary message sent from the Hub to all remotes, at regular intervals, specifying the relative start time and durat ion for each terminal to transmit. To change the current address, enter N at the command prompt to display the dialog shown in figur e 3-10.
Chapter 3 - Using the Command Line Interface (CLI) 3-13 Vipersat Configuration Figure 3-12 Cycles per Burst Map prompt Slot Guardband This menu item displays the current length of the slot guardband in milli- seconds and t he size of the guardband in bytes for the t arget CDM-57 0/570L.
Vipersat Configuration 3-14 Vipersat CDM-570/570L User Guide Note: Refer to the Viper Ca lculator for determin ing preamble length values to enter a t the command prompt. If yo u not have a copy of the latest Viper Calculato r, contact your Co mtech Vipersat Networks representative to inquire about a copy.
Chapter 3 - Using the Command Line Interface (CLI) 3-15 Vipersat Configuration Slot S t art in Cycle This menu item is an information-only display for Remote modems, and indi - cates how much time passe s from the start of the spin cycle until this Remote is provided a time slot.
Vipersat Configuration 3-16 Vipersat CDM-570/570L User Guide Figure 3-17 Adding a Re mote to th e STDMA group Once a Remote has been added to the group, its Status in th e group is displayed by the us.
Chapter 3 - Using the Command Line Interface (CLI) 3-17 Vipersat Configuration Remote Count The Remote C ount menu item in figure 3-16 is an information only display showing the total number of Remotes that currently belong to the STDMA group for thi s Hub modem.
Vipersat Configuration 3-18 Vipersat CDM-570/570L User Guide The Remote Policies screen for an Entry Channel Hub type allows the SCPC data rates and switch types to be specified for when a Remote will switch and the desired starting point for communications.
Chapter 3 - Using the Command Line Interface (CLI) 3-19 Vipersat Configuration Figure 3-24 Global Switch Type prompt Delete Remote Entering D at the command prompt shown in figure 3-16 brings u p the Delete Remote dialog shown in figure 3-25.
Vipersat Configuration 3-20 Vipersat CDM-570/570L User Guide Figure 3-27 View Remote(s) screen The display is for information only and pressing any key will return you to the menu shown in figure 3-16. Remove Timeout Entering R at the command prompt shown in figure 3-16 will display the Remove Timeout dialog shown in figure 3-28.
Chapter 3 - Using the Command Line Interface (CLI) 3-21 Vipersat Configuration Figure 3-29 Remove Retry Ti meout prompt When a Remote is removed from the STDMA group, as described in the section “Re.
Vipersat Configuration 3-22 Vipersat CDM-570/570L User Guide Figure 3-31 STDMA Statistics screen (Remote) The window of time that is used to average the accumulation of statistics can be set by entering W at the command prompt in the Hub screen, then entering the number of seconds (from 1 to 20).
Chapter 3 - Using the Command Line Interface (CLI) 3-23 Vipersat Configuration the Nominal Data Slot Size and the Minimum Data Slot Size parameters. These parameters are operator selectable.
Vipersat Configuration 3-24 Vipersat CDM-570/570L User Guide Figure 3-34 STDMA/SCPC Auto Switching screen (Remote) Auto Switching The Auto S witching item is for information only and shows the current config- uration of the target CDM-570/570L. This feature is Enabled and Disabled as described in section “Feature Configuration” on page 3-4.
Chapter 3 - Using the Command Line Interface (CLI) 3-25 Vipersat Configuration Detection of the voice and video traffic occurs in the Remote modem classifier, which looks at traffic that is passed in both directions (Hub-to-Remote and Remote-to-Hub).
Vipersat Configuration 3-26 Vipersat CDM-570/570L User Guide most encryption methods, ToS switching provides an alternative means of SCPC switching when encryption prevents the detection of SIP and H.
Chapter 3 - Using the Command Line Interface (CLI) 3-27 Vipersat Configuration classifier, which looks a t traffic that is pa ssed in both directions (Hub-to- Remote and Remote-to-Hub).
Vipersat Configuration 3-28 Vipersat CDM-570/570L User Guide Figure 3-35 QoS Configuratio n screen Enter Q at the command prompt in figure 3-35 to access the QoS Rules Config- uration screen, as shown in figure 3-36.
Chapter 3 - Using the Command Line Interface (CLI) 3-29 Vipersat Configuration Figure 3-37 QoS Rules Based Switching screen Determine which QoS rules will be used as a basis for performing SCPC switching, then configure the VMS policy type, the SCPC switch rate, and the timeout value to be associated with each rule.
Vipersat Configuration 3-30 Vipersat CDM-570/570L User Guide Note: Load Switching must be enabled fo r each CDM-570/570L in a network that is goin g to perform Load Switchin g in order for the VMS to dynamically optimize network performance as load condi- tions change on these circuits.
Chapter 3 - Using the Command Line Interface (CLI) 3-31 Vipersat Configuration Figure 3-39 STDMA Switch Delay prompt Percent Allo cation The Percent Allocation menu item allows adding a fixed percentage to the channel bandwidth request to accommodate additional bandwidth requirements which may occur after the switch is made from STDMA to SCPC mode.
Vipersat Configuration 3-32 Vipersat CDM-570/570L User Guide The SCPC Step Down Threshold establishes the percentage of bandwid th use that will trigger a switch down from the present SCPC rate to a lower rate to ensure efficient bandwidth usage.
Chapter 3 - Using the Command Line Interface (CLI) 3-33 Vipersat Configuration Figure 3-41 ToS Switching Control screen T oS Switching Entry After determining what ToS value to use, either application or router classifier, select a ToS entry from the list for configuration or edit.
Vipersat Configuration 3-34 Vipersat CDM-570/570L User Guide • Enter the TOS SCPC Switch Data Rate - Enter the desired data rate for this service type. Valid entries are from 0 to 10,000 Kbps. This setting will override the VMS set policy val ue. • Enter the TOS SCPC Timeout - This timer monitors the defined packet flow.
Chapter 3 - Using the Command Line Interface (CLI) 3-35 Vipersat Configuration Unit Role The Unit Role configuration determines whether the target CDM-570/570L is to function as a Remote or as a Hub in the Vipersat satellite network. From the Vipersat Configuration screen (figure 3-5), enter R to display the dialog shown in figure 3-45 .
Vipersat Configuration 3-36 Vipersat CDM-570/570L User Guide Network ID The Networ k ID that is assigned to the unit defines to what network the target CDM-570/570L will belong.
Chapter 3 - Using the Command Line Interface (CLI) 3-37 Vipersat Configuration configuration data, incl uding the CDM-570/570L’s IP addres s. When the VMS receives the unicast response, it registers the CDM-570/570L on the netw ork.
Vipersat Configuration 3-38 Vipersat CDM-570/570L User Guide N:M redundancy (protected) configurations. The message interval can be speci- fied by the administrator through the VMS. Enter P at the command prompt in the Vipersat Configuration screen (figure 3-5) to toggle this feature between Enabled and Disabled .
Chapter 3 - Using the Command Line Interface (CLI) 3-39 Vipersat Configuration Figure 3-51 DPC Configuration screen (STDMA mode) Figure 3-52 DPC Configuration screen (SCPC mode) Note: The following descriptions will refer to the CDM-570/570L as either modulator or demodulator for simplicity and understanding.
Vipersat Configuration 3-40 Vipersat CDM-570/570L User Guide Calibrated Dat a Rate This menu item is for information only and displays the Calibr ated Data Rate in Kbps for the target CDM-570/570L.
Chapter 3 - Using the Command Line Interface (CLI) 3-41 Vipersat Configuration Figure 3-54 Minimum Power Level prompt (CDM-570L) The value entered sets the minimum power level allowed by all SCPC modula- tors.
Vipersat Configuration 3-42 Vipersat CDM-570/570L User Guide T arget EbNo The Target EbNo is the desired operating receive level for closed loop servo control. This is the value used by the receiving CDM-570/570L for comparison with the actual received Eb/No.
Chapter 3 - Using the Command Line Interface (CLI) 3-43 Vipersat Configuration Enter Q at the command prompt in the DPC Configuration screen to displa y the Speed Up EbNo dialog sh own in figure 3-59.
Vipersat Configuration 3-44 Vipersat CDM-570/570L User Guide prompt in the Vipersat Configura tion screen to display the Home State Configuration screen shown in figure 3-61.
Chapter 3 - Using the Command Line Interface (CLI) 3-45 Vipersat Configuration Tip: This command is useful when a CDM-570/57 0L’s initial set up is completed an d the unit is functio ning as desired in a ne twork.
Vipersat Configuration 3-46 Vipersat CDM-570/570L User Guide Figure 3-64 Transmit Data Rate prompt Note that the valid range for this parameter will vary depending on the modula- tion type, co ding rate, and FAST feature data rate.
Chapter 3 - Using the Command Line Interface (CLI) 3-47 Vipersat Configuration T ransmit Modulation T ype Entering E at the command pro mpt to use the dialog shown in figure 3-67 to set the Transmit Modulation Type for the target CDM-570/570L ’s home state.
Vipersat Configuration 3-48 Vipersat CDM-570/570L User Guide Note that this screen dialog example displays the frequency range for the CDM- 570L L-Band modem.
Chapter 3 - Using the Command Line Interface (CLI) 3-49 Vipersat Configuration Figure 3-72 Receive Coding Rate prompt Note that Coding Rates 3 (1/2), 4 (2/3), and 8 (1/1) are not valid selections when operating in Vipers at mode with Turbo Product C oding.
Vipersat Configuration 3-50 Vipersat CDM-570/570L User Guide Figure 3-74 Vipersat Summary screen The Node I D number that appears in this screen ve rifies that the unit is regis- tered with the VMS and is active in t he network. This number is automatically assigned by the VMS.
Chapter 3 - Using the Command Line Interface (CLI) 3-51 Vipersat Configuration Figure 3-75 Vipersat Migration prompt Refer to Appendix D, Firmware Installation , in this document for additional information on the use of this command.
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Appendix A - Network Addressing A-1 A PPENDIX N ETWORK A DDRESSING This Appendix is an overview of network addressing and how it applies to configuring the CDM-570/5 70L for use in Vipersat Network s.
The OSI Reference Model A-2 Vipersat CDM-570/570L User Guide The OSI Reference Model OSI is an acronym for Open Systems Interconnection. This is a network model created by ISO (the International Standardization Organization.) The OSI model is the basic st andard which forms the basis for all networkin g protocols.
Appendix A - Network Addressing A-3 The OSI Reference Model Layer 3 / Network Layer – Layer 3 is responsible for routing pack ets through multiple networks. The Layer 3 protocol operates without regard to the underly- ing protocols in use. For example, routers operate at Layer 3.
Binary Math A-4 Vipersat CDM-570/570L User Guide Binary Math Network devices communicate using BITS, where a bit is a single digit repre- sented by a 1 o r a 0, or by using BYTEs, where a b yte is made up of eight bits in any combination of 1’s or 0’s.
Appendix A - Network Addressing A-5 Binary Math The conversion to decimal is done whenever binary values need to be read or entered by humans as their decimal equivalents.
IP Addressing A-6 Vipersat CDM-570/570L User Guide IP Addressing An IP (Internet Protocol) address is a unique set of numbers assigned to a device on a network to uniquely identify that device (by its IP address). An IP address is a unique number composed of four octets, with each octet separated by a dot.
Appendix A - Network Addressing A-7 IP Addressing • 16-bit node number Figure A-4 IP Address Classes A, B, C Class C • 192.0.1.x to 223 .255.254.x • 2,097,152 Class Cs ex ist • Can have 254 hosts on each Class C • 24-bit network numb er • 8-bit node number Class D • 224.
IP Addressing A-8 Vipersat CDM-570/570L User Guide Private Network IP Addre sses RFC 1918 defines blo cks of addresses for use on pri vate networks: • 10.
Appendix A - Network Addressing A-9 IP Addressing Subnetting is required if the network is segmented. Subnet Mask The Subnet Mask is used by the host to determine if a destination IP address is on the local or on a remote network segment. The table in Figure A-6 shows the default subnet mask used for each class of IP address.
IP Addressing A-10 Vipersat CDM-570/570L User Guide Figure A-7 ANDing an IP address and a subnet mask A calculator, available from SolarWinds, performs these IP and subnet mas k calculations and can be found at: http://support.solarwinds.net/up dates/SelectProgramFree.
Appendix A - Network Addressing A-11 IP Addressing Each of the four subnets can, in turn, suppo rt 64 members. The example subnet used above yielded 4 subnets, but you c an use a different mask to meet the specific requirements of your network.
IP Addressing A-12 Vipersat CDM-570/570L User Guide • The first six characters are issued to the organization. • The second six characters are assigned to the hardware interface by manufacturing.
Appendix B - Automatic Switching B-1 A PPENDIX A UTOMATIC S WITCHING General Automatic switching is a feature of VMS which allows dynamically changing network configuration in response to changes in either traffic type (application switching) or network traffic loads (load switching.
Load Switching B-2 Vipersat CDM-570/570L User Guide excess margin. The main difference between swit ching from STDMA to SCPC and adjusting within SCPC is that in STDMA mode, the current available band- width is constantly changing while in SCPC mode it is constant between switches.
Appendix B - Automatic Switching B-3 Load Switching 3. Determine if a load switch is needed. Table 2.1 STDMA ACK Message Table B-1 If there is adequate upstream bandwidth available, the values of these two metrics will be the same.
Load Switching B-4 Vipersat CDM-570/570L User Guide remote is divided by the total Bytes in Queue for all remotes to give the percentage allocation for each remote.) • Dynamic Slot Mode - The slot size for each remote is computed based on the time (at the current data rate) needed to transmit all the Bytes in Queue.
Appendix B - Automatic Switching B-5 Load Switching Table B-2 Figure B-1 Hub autoswitching menu • Auto Switching - This is a Vipersat Feature which is enabled in the CDM Features Menu. If Auto Switching is not enabled, Load Switching will be ignored.
Load Switching B-6 Vipersat CDM-570/570L User Guide Load Switching Process Each time the hub receives an STDMA ACK, it computes the average load for that remote. (See Appendix A for a discussion of how the average is computed.) This average is then compared to the bandwidth currently allocated to the remote.
Appendix B - Automatic Switching B-7 Load Switching Table B-3 Figure B-2 Autoswitching menu for a remote • Auto Switching - Same as Hub • Load Switching - Same as Hub • SCPC Step Up Threshold - Same as STDMA Slot Capacity at hub.
Load Switch Example B-8 Vipersat CDM-570/570L User Guide Load Switch Example An automatic load switching example, illustrated in the schematic diagram in figure B-3, illustrates how a network can respond to changes in t raffic volume or load conditions.
Appendix B - Automatic Switching B-9 Load Switch Example 3. The STDMA Hub Controller compares the remote CDM-570/570L’s pre- selected buffer limits with its buffer status and if the buffer status exceeds the preselected limits the STDMA Hub Controller increases the time-slot allocated to that channel.
Load Switch Example B-10 Vipersat CDM-570/570L User Guide Reduced dat a flow in switched mode (SCPC) In the event the data flow is reduced, for example a s treaming file transfer termi- nates, the SCPC switched demodulator detects the reduced flow and notifies the VMS.
Appendix B - Automatic Switching B-11 Application switching Application switching Application switching, diagramed in figure B-4, also is capable of changing bandwidth used, but the change is determined entirely by the type of application being requested ignoring load requirements.
Application switching B-12 Vipersat CDM-570/570L User Guide Each application type will have been assigned a bandwidth allocation when the policy for the remote site is established. The voice applicati on, for example, might have had the bandwidth set in the policy to handle three simultaneous voice connections.
Appendix B - Automatic Switching B-13 Type of Service (ToS) Switching T ype of Service (T oS) Switching Type of Service (ToS) switching is used on circuits carrying encrypted traffic where the packet s cannot be examined to determine the type of traffic being carried.
Entry Channel Mode (ECM) Switching B-14 Vipersat CDM-570/570L User Guide Entry Channel Mode (ECM) Switching STDMA entry channel mode provides a method for remotes requiring SCPC access channels to enter/re-enter the network initially or after a power or other site outage.
Appendix B - Automatic Switching B-15 Entry Channel Mode (ECM) Switching 1. If the outage was the result of power outage at the site, the remote CDM570(L) will reboot in its home state (ST DMA), acknowledge the receipt of the first burst map causing it to rejoin t he network through ECM.
Entry Channel Mode (ECM) Switching B-16 Vipersat CDM-570/570L User Guide Table B-8 Figure B-6 ECM switch recovery > 3 minutes Unit Reboot 0 Burst Demod Switched Demod VMS Remote State Connected 0 Home Stat e - S T D M A TX Grant Burs t ACK > 240 Satellite Delay 250 ms + 30 ms E - E State Disconnected 180 F a i l u r e No Communic ations 180 .
Appendix C - Dynamic Power Control C-1 A PPENDIX D YNAMIC P OWER C ONTROL Introduction Dynamic Power Control (DPC) provides a mechanism whereby VIPERSAT satellite links have their transmit power levels adjusted in order to optimize the receive signal quality (as measured by the demodulator Eb/No).
C-2 Vipersat CDM-570/570L User Guide Eb/No values as the input function and the modulator’s transmit power as the output function. Only modulator transmit power is controlled by t he algorithm since the receive chain has its own automatic gain control.
Appendix C - Dynamic Power Control C-3 The start poi nt for all enabled modulators is the Nominal Power Level. This level is measured during initial system turn-up and i s the power level at which all modems will initially transmit when a call is est ablished.
C-4 Vipersat CDM-570/570L User Guide DPC Scaling Function Figure C-1 DPC Scaling F unction Figure C-1 illustrates the scaling function, based on the ratio of power level to data rate, of the DPC system.
Appendix C - Dynamic Power Control C-5 able to function and will disable itself, resulting in an error message that is displayed in the CLI. Under most circumstances, the system will be running at the Calibrated Data Rate, at the Calibrated Nominal Power level.
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Appendix D - Network Migration D-1 A PPENDIX N ETWORK M IGRATION Upgrading CDM-570/CDD-564 Series Modems to Firmware V ersion 1.5.3 General This document co vers the migration of networks with CDM- 570 and CDD-564 series modems to Firmware version 1.5.
General D-2 Vipersat CDM-570/570L User Guide Since there is no way to guarantee all Remote sites wil l be online during the initial upgrade to v1.5.3, Vipersat is providing this migration procedure and util- ity to facilitate picking up new or offline units.
Appendix D - Network Migration D-3 Firmware Upgrade Firmware Upgrade Upgrade Overview This procedure describes the firmware upgrade process using both the Vipe rsat Vload Utility and a Telnet connection. For detai led information on using Vload, refer to the Vload Utility User Guide .
Firmware Upgrade D-4 Vipersat CDM-570/570L User Guide 6) "Get Information" and load v1.5.1 base modem code to "Olde st" and reset all the modems to "Latest". 7) Load v1.5.1 modem code to "Oldest" (replacing the older image in the other location).
Appendix D - Network Migration D-5 Firmware Upgrade Figure D-2 Initial Vload screen Figure D-3 Add All dialog Note that the Receive Multicast Address is the same as the Transmit Multicast Address for the VMS. This IP address can be found unde r the VMS ViperView tree view “Vipersat Manager”.
Firmware Upgrade D-6 Vipersat CDM-570/570L User Guide Figure D-4 Get Information for IP Address It is very important to get information after each step. VLOAD needs to be aware of the current co nfiguration of the mode ms when making decisions about "Oldest" and "Latest".
Appendix D - Network Migration D-7 Firmware Upgrade Figure D-5 Put Application screen (Consecutive Load) Save and Reboot to Latest Using either VMS or CLI, Save each unit to flash and reboot with Hard Reset to Latest . Figure D-6 Hard Reset screen Note that all other parameters are set to defaults and do not require any changes.
Firmware Upgrade D-8 Vipersat CDM-570/570L User Guide Get Information for Router v1.5.3 Figure D-7 Unit Information screen (Router) The new unit information wi ll show that Image 1 Version=1.5.3 and that the Application Version=1.5.3. The application CurrentBoot should = the image slot location of 1.
Appendix D - Network Migration D-9 Firmware Upgrade Figure D-9 Configuration Fi le Text If this text is not displayed, Save to flash again, get the configuration and ch eck for them in the configuration file once more. Note that the contents of the text lines will differ based on the actual configuration and modem t ype.
Firmware Upgrade D-10 Vipersat CDM-570/570L User Guide Figure D-11 Download v1.4.5 and Hard Reset screen When the file transfer is completed, Hard Reset the Modem(s). Upgrade Image 1 on Base Modem to v1.5.1 Get Unit Information to show that v1.4.5 modem code is loaded in Image 1 and that the Base Modem Current Image = Image 1.
Appendix D - Network Migration D-11 Firmware Upgrade Figure D-13 Download v1.5.1 and Hard Reset screen Download Base Modem v1.5.1 to Image 2 Get Unit Information to show that the current Base Modem image is Image 2, which is v1.
Firmware Upgrade D-12 Vipersat CDM-570/570L User Guide Figure D-15 Unit Information screen (Base Modem v1 .5.1) Download Router v1.5.3 to Image 2 Download the v1.5.3 firmware file to the Router Image 2. This insures that the latest firmware code is loaded in all images.
Appendix D - Network Migration D-13 Firmware Upgrade the v1.5.3 firmware will lose communications during t his time, so a planned maintenance outage is necessary. It is only necessary to download 1 image of the Router to v1.5.3 and reset the Remotes in order for them to rejoin the network, unless the associated Burst Controller is running BFAT.
Firmware Upgrade D-14 Vipersat CDM-570/570L User Guide Figure D-18 Vipersat Configuration screen The Vipersat Migration Parameter "M" is available only on Hub non-expansion units. Figure D-19 Vipersat Migration prompt Select O to set the old framing mode to v1.
Appendix D - Network Migration D-15 Firmware Upgrade The straggler Remotes will now frame on the TDM outbound signal. The asso- ciated Burst Controller(s) will frame on the inbound signals from these Remotes ONLY. Download the v1.5.3 Router firmware and Reset the straggler Remotes.
Firmware Upgrade D-16 Vipersat CDM-570/570L User Guide { This Page is Intentionally Blank }.
Appendix E - Glossary E-1 A PPENDIX G LOSSARY A ALC A utomatic L imit C ontrol is a closed loop mechanism controlling the gain stabilization of the HP A ’ s RF output power . APL A synchronous P arty L ine – A VIPERSAT term for RS-485 multi-drop bus used for control of indoor equipment.
E-2 Vipersat CDD-564L User’s Guide BPSK B inary P hase S hift K eying – A modulation t echnique in which the carrier is phase shifted +/- 180 degrees. See also QPSK C C-Band A frequency band commonly used for satellite communications (and sometimes terrestrial microwave).
Appendix E - Glossary E-3 E Eb/No Eb/No Ratio Eb = energy per bit No = noise power density per Hz. The bit error rate (BER) for digital data is a decreasing function of this ratio. Eb is the energy of an information bit. Eb is measured in Joules, or equivalently in Watts per Hertz.
E-4 Vipersat CDD-564L User’s Guide Group ID A number assigned to equipment which defines it as a member of a group when addressed by the burst controller. GUI G raphical U ser I nterface – A form of graphical shell or user interface to a computer operating system.
Appendix E - Glossary E-5 K Kb/s K ilo B its per S econd - 1000 bits/second. A measure of transmission speed. See also bps & Mb/s. Ku-Band A frequency band used for satellite communications. For terrestrial earth stations the receive frequency band is in the range 10.
E-6 Vipersat CDD-564L User’s Guide N NAT N etwork A ddress T ranslation - An Internet standard that enables a local-area network (LAN) to use one se t of IP addresses for internal (private) traffic and a second set of addresses for external (public) traffic.
Appendix E - Glossary E-7 R RF R adio F requency – A generic term for signals at frequencies above those used for baseband or IF. RFC R equest F or C omment – The de-facto Internet standards issued by the Internet Engineering Task Force (IETF).
E-8 Vipersat CDD-564L User’s Guide T TCP/IP T ransmission C ontrol P rotocol / I ntern et P rotocol – A standard for networking over unreliable transmission paths. See also UDP. TDMA T ime D ivision M ultiple A ccess – A multiple access technique where users contend for access to a common channel on a time-shared basis.
Appendix E - Glossary E-9 W Wizard A specialized program which performs a specific function, such as installing an application (installation wizard)..
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However, one of the most important roles played by the user manual is to help in solving problems with Comtech EF Data CDM-570. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Comtech EF Data CDM-570 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
