S
-
5
0
CR
1:1 Redundancy Switch
Installation and Operation Manual
(Requires Modem Firmware Version 1.1.0 or Higher)
Accessory Product for use only with
Comtech EF Data CDM-600 Modems
1
IMPORTANT NOTE: The information contained in this document supersedes all previously published
information regarding this product. Product specifications are subject to change without prior notice.
Part Number MN/CRS150.IOM Revision 2
S
-
0
CR
15
1:1 Redundancy Switch
Installation and Operation Manual
Accessory Product for use only with
Comtech EF Data CDM-600 Modems
(Requires Modem Firmware Version 1.1.0 or Higher)
Part Number MN/CRS150.IOM
Revision 2
August 11, 2011
Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: 480.333.2161
Copyright © 2011 Comtech EF Data. All rights reserved. Printed in the USA.
This page is intentionally blank.
TABLE OF CONTENTS
TABLE OF CONTENTS .............................................................................................................. III
TABLES ...................................................................................................................................... VI
FIGURES .................................................................................................................................... VI
PREFACE .................................................................................................................................. VII
About this Manual
Reporting Comments or Suggestions Concerning this Manual .............................................................. vii
Related Documents ................................................................................................................................... vii
Conventions and References ................................................................................................................... viii
Warnings, Cautions, and Notes ............................................................................................................. viii
Metric Conversion ................................................................................................................................. viii
Recommended Standard Designations .................................................................................................. viii
Trademarks ............................................................................................................................................ viii
Electromagnetic Compatibility (EMC) Compliance ............................................................................... ix
EN 55022-1997 Compliance ................................................................................................................... ix
EN 50082-1:1998 Compliance ................................................................................................................ ix
Safety Compliance ..................................................................................................................................... ix
EN 60950 ................................................................................................................................................. ix
Electrical Safety ....................................................................................................................................... ix
Equipment Connection ............................................................................................................................. x
European Low Voltage Directive (LVD) ................................................................................................. x
Federal Communications Commission (FCC) .......................................................................................... x
Telecommunications Terminal Equipment Directive .............................................................................. xi
Environmental ......................................................................................................................................... xi
.................................................................................................................................... vii
Warranty Policy ......................................................................................................................................... xi
Limitations of Warranty .......................................................................................................................... xi
Exclusive Remedies ................................................................................................................................ xii
Customer Support .................................................................................................................................... xiii
Online Customer Support ...................................................................................................................... xiii
CHAPTER 1. INTRODUCTION ........................................................................................... 1–1
1.1 Overview ..................................................................................................................................... 1–1
1.2 Description of Features .............................................................................................................. 1–2
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1.3 Functional Description .............................................................................................................. 1–4
1.4 Summary of Specifications ........................................................................................................ 1–5
1.5 Dimensional Envelope ............................................................................................................... 1–7
CHAPTER 2. INSTALLATION ............................................................................................ 2–1
2.1 Unpacking and Inspecting the Shipment ................................................................................. 2–1
2.2 Rack-Mounting the CRS-150 .................................................................................................... 2–2
CHAPTER 3. CONNECTOR PINOUTS .............................................................................. 3–1
3.1 Connector Overview .................................................................................................................. 3–1
3.2 Front Panel Connectors ............................................................................................................. 3–3
3.2.1 Front Panel IF Connectors – Receive IF and Transmit IF, 50Ω BNC ..................................... 3–3
3.2.2 Front Panel Terrestrial Data Connectors ................................................................................. 3–4
3.2.2.1 Overhead Data Connector, DB-25M .............................................................................. 3–4
3.2.2.2 Data Interface Connector, DB-25F ................................................................................. 3–5
3.2.2.3 Audio Connector, DB-9F ................................................................................................ 3–6
3.2.2.4 G.703 Connectors ........................................................................................................... 3–6
3.2.2.4.1 Balanced G.703 Interface Connector, DB-15F ......................................................... 3–6
3.2.2.4.2 Rx and Tx (Unbalanced) G.703 Connectors, 75Ω BNC .......................................... 3–7
3.2.2.4.3 IDI, DDO Connectors, 75Ω BNC ............................................................................ 3–7
3.2.3 Front Panel Utility Connectors ................................................................................................ 3–8
3.2.3.1 Ext Ref, 50Ω BNC .......................................................................................................... 3–8
3.2.3.2 IDR Alarms Connector, DB-15F .................................................................................... 3–8
3.2.4 Front Panel P
ower Connections – Aux DC Inputs .................................................................. 3–8
3.3 Rear Panel Connectors .............................................................................................................. 3–9
3.3.1 Rear Panel IF Connectors – Receive IF and Transmit IF A/B, 50Ω BNC............................... 3–9
3.3.2 Rear Panel Terrestrial Data Connectors ................................................................................ 3–10
3.3.2.1 Balanced G.703 A and B Connectors, DB-15M ........................................................... 3–10
3.3.2.2 Audio A and B Connectors, DB-9F .............................................................................. 3–11
3.3.2.3 Overhead Data A and B Connectors, DB-25M ............................................................. 3–12
3.3.2.4 Data Interface A and B Connectors, DB-25F ............................................................... 3–13
3.3.3 Rear Panel Utility Connectors ............................................................................................... 3–14
3.3.3.1 IDR Alarms A and B Connectors, DB-15F .................................................................. 3–14
3.3.3.2 Aux Serial A and B Receptacles, USB Type ‘A’ ......................................................... 3–14
3.3.3.3 Ext Ref A and B Connectors, 50Ω BNC ...................................................................... 3–15
3.3.4 Ground Connection ............................................................................................................... 3–15
3.4 Data Interface Converter Modules / Adapters ...................................................................... 3–15
3.4.1 CIC-20 HSSI Connector, HD-50F ......................................................................................... 3–16
3.4.2 CIC-35 ASI Connectors, 75Ω BNC ...................................................................................... 3–16
3.4.3 E1/T1 RJ-48 Connection via Balanced G.703 Interface Connector ...................................... 3–17
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CHAPTER 4. CABLES AND CONNECTIONS ................................................................... 4–1
4.1 Overview ..................................................................................................................................... 4–1
4.2 Cabling to the CDM-600 ........................................................................................................... 4–2
4.2.1.1 CRS-150 Accessories ..................................................................................................... 4–2
4.2.2 Modem-to-Switch Control Interface Connection .................................................................... 4–3
4.2.3 Modem-to-Switch IF Interface Connection ............................................................................. 4–4
4.2.4 Modem-to-User Utility Interface Connection and Examples .................................................. 4–5
4.2.4.1 IDR Alarms Data Interface Example .............................................................................. 4–5
4.2.4.2 External Reference Data Interface Example ................................................................... 4–6
4.2.5 Modem-to-User Data Interface Connection and Examples ..................................................... 4–7
4.2.5.1 RS-422/232 Interface Example ....................................................................................... 4–8
4.2.5.2 HSSI Data Interface Example ......................................................................................... 4–9
4.2.5.3 G.703 Balanced Interface Example .............................................................................. 4–10
4.2.5.4 G.703 Unbalanced Interface Example .......................................................................... 4–11
4.2.5.5 ASI Data Interface Example ......................................................................................... 4–12
4.2.5.6 E1/T1 Data Interface Example ...................................................................................... 4–13
4.2.5.7 Overhead Data Interface Example ................................................................................ 4–14
4.2.5.8 Audio Data Interface Example ...................................................................................... 4–15
4.3 Cabling to the CDM-600L (CLM-9600L) .............................................................................. 4–16
CHAPTER 5. MODEM AND SWITCH CONFIGURATION ................................................. 5–1
5.1 Overview ..................................................................................................................................... 5–1
5.2 Configuration of CDM-600s for 1:1 Redundancy ................................................................... 5–2
5.2.1 Automatic Redundant Operation ............................................................................................. 5–2
5.2.2 Manual Redundant Operation (Forced Switchover) ................................................................ 5–3
5.2.2
.1 Forced Switchover via the CDM-600 Front Panel .......................................................... 5–3
5.2.2.2 Forced Switchover via Remote Bus ................................................................................ 5–3
5.2.3 Replacement of Standby Unit .................................................................................................. 5–3
5.3 CRS-150 Switch DIP Settings ................................................................................................... 5–4
APPENDIX A. CABLE DRAWINGS .................................................................................... A-1
A.1 Introduction ................................................................................................................................ A-1
A.2 Control Interface Cables ........................................................................................................... A-1
A.2.1 Modem-to-Switch Auxiliary Serial Cable (1:1 Control), USB Type A Æ USB Type B ... A-2
A.2.2 Modem-to-Switch (CRS-150 Æ CRS-170A) Control/Data ‘Y’ Cable, DB-25M Æ DB-25M,
DB-9M (CDM-600L [CDM-9600L]) ................................................................................................... A-3
A.3 IF / Utility / Data Interface Cables ........................................................................................... A-4
A.3.1 Modem-to-Switch/User IF (70/140 MHz) Coax Cable, Type ‘BNC’ 50Ω ......................... A-5
A.3.2 Modem-to-Switch Data Cable, DB-15M Æ DB-15M ........................................................ A-6
A.3.3 Modem-to-Switch Coax Cable, Type ‘BNC’ 75Ω .............................................................. A-7
A.3.4 Modem-to-Switch Universal Control/Data Cable, DB-25M Æ DB-25M .......................... A-8
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A.3.5 Modem-to-Switch Universal Control/Data Cable, DB-15M Æ DB-15M .......................... A-9
A.3.6 Modem-to-Switch Data Cable, DB-25M Æ DB-25M ...................................................... A-10
A.3.7 Modem-to-Switch Data Cable, DB-9M Æ DB-9M .......................................................... A-11
TABLES
Table 3-1. CRS-150 External Connectors (Front and Rear Panel) ........................................................... 3–2
Table 5-1. CRS-150 DIP Switch Settings ................................................................................................. 5–4
FIGURES
Figure 1-1. CRS-150 1:1 Redundancy Switch .......................................................................................... 1–1
Figure 1-2. CRS-150 1:1 Redundancy Switch – Panel Views .................................................................. 1–2
Figure 1-3. CRS-150 Dimensional Envelope ........................................................................................... 1–7
Figure 2-1. Unpacking and Inspecting the Shipment ................................................................................ 2–1
Figure 2-1. Typical CDM-600/CRS-150 1:1 Redundancy Installation .................................................... 2–2
Figure 3-1. CRS-150 Connectors .............................................................................................................. 3–1
Figure 3-2. CN-0000268 DB-15M Æ RJ-48F Adapter for E1/T1 Operation......................................... 3–17
Figure 4-1. Modem-to-Switch Control Connection .................................................................................. 4–3
Figure 4-2. Modem-to-Switch IF Connection ........................................................................................... 4–4
Figure 4-3. IDR Alarms Interface Example .............................................................................................. 4–5
Figure 4-4. Ext Ref (External Reference) Interface Example ................................................................... 4–6
Figure 4-5. CDM-600 Block Diagram: User Æ Modem Æ Switch Æ Traffic ........................................ 4–7
Figure 4-6. RS-422/232 Interface Example .............................................................................................. 4–8
Figure 4-7. HSSI Example ........................................................................................................................ 4–9
Figure 4-8. G.703 Balanced Interface Example ...................................................................................... 4–10
Figure 4-9. G.703 Unbalanced Interface Example.................................................................................. 4–11
Figure 4-10. ASI Example ...................................................................................................................... 4–12
Figure 4-11. G.703 E1/T1 Interface Example ......................................................................................... 4–13
Figure 4-12. Overhead Interface Example .............................................................................................. 4–14
Figure 4-13. Audio Interface Example ................................................................................................... 4–15
Figure 4-14. CDM-600L (CLM-9600L) Block Diagram: Cable Connections ....................................... 4–16
Figure 5-1. CDM-600 Front Panel ............................................................................................................ 5–2
Figure 5-2. CRS-150 Front Panel – DIP Switches .................................................................................... 5–4
Figure A-1. Auxiliary Serial Control Cable (CEFD P/N CA/USB-AM/BM-3) ...................................... A-2
Figure A-2. Data / Control ‘Y’ Cable (CEFD P/N CA/WR10456-4) ....................................................... A-3
Figure A-3. Tx/Rx/User Data Type ‘BNC’ 50Ω Coax Cable (CEFD P/N PL/0946-1) ............................ A-5
Figure A-4. IDR Alarms Interface Cable (CEFD P/N CA/WR9564-4) ................................................... A-6
Figure A-5. External Reference Type ‘BNC’ 75Ω Coax Cable (CEFD P/N PL/0813-4) ........................ A-7
Figure A-6. 1:1 Universal Control/Data Cable (CEFD P/N PL/6233) ..................................................... A-8
Figure A-7. 1:1 Universal Control/Data Cable (CEFD P/N CA/WR9563-4) ........................................... A-9
Figure A-8. Overhead Data Cable (CEFD P/N CA/WR9040-4) ............................................................ A-10
Figure A-9. Audio Data Interface Cable (CEFD P/N CA/WR9378-4) .................................................. A-11
vi
PREFACE
About this Manual
This manual provides installation and operation information for the Comtech EF Data CRS-150 1:1
Redundancy Switch, used for 1:1 Redundancy operations with the CDM-600 Satellite Modem.
This is a technical document intended for the persons responsible for the operation and maintenance
of the CRS-150 and CDM-600.
Reporting Comments or Suggestions Concerning this Manual
Comments and suggestions regarding the content and design of this manual are appreciated. To
submit comments, please contact the Comtech EF Data Technical Publications Department:
TechnicalPublications@comtechefdata.com.
Related Documents
• Comtech EF Data CDM-600/600L Satellite Modem Installation and Operation Manual
• Comtech EF Data CIC-20 LVDS to HSSI Interface Converter Installation and Operation Manual
• Comtech EF Data CIC-35 LVDS to ASI Interface Converter Installation and Operation Manual
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Preface MN/CRS150.IOM
Conventions and References
Warnings, Cautions, and Notes
A WARNING gives information about a possible hazard that MAY CAUSE
DEATH or SERIOUS INJURY.
A CAUTION gives information about a possible hazard that MAY CAUSE
INJURY or PROPERTY DAMAGE.
A NOTE
A REFERENCE
equipment.
gives important information about a task or the equipment.
directs the user to additional information about a task or the
Metric Conversion
Metric conversion information is located on the inside back cover of this manual. This information
is provided to assist the operator in cross-referencing non-metric to metric conversions.
Recommended Standard Designations
Recommended Standard (RS) Designations have been superseded by the new designation of the
Electronic Industries Association (EIA). References to the old designations are shown only when
depicting actual text displayed on the screen of the unit (RS-232, RS-485, etc.). All other
references in the manual will be shown with the EIA designations (EIA-232, EIA-485, etc.) only.
Trademarks
All product names mentioned in this manual may be trademarks or registered trademarks of their
respective companies and are hereby acknowledged.
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Preface MN/CRS150.IOM
Carefully review the information that follows.
Electromagnetic Compatibility (EMC) Compliance
This is a Class B product. In a domestic environment, it may cause radio interference that requires
the user to take adequate protection measures.
EN 55022-1997 Compliance
This equipment meets the radio disturbance characteristic specifications for information technology
equipment as defined in EN 55022-1997.
EN 50082-1:1998 Compliance
This equipment meets the Electromagnetic Compatibility: Generic Immunity standard as defined
in EN50082-1:1998.
In order that the CRS-150 continues to comply with these standards, observe the following
instructions:
• Connections to the transmit and receive IF ports (BNC female connectors) should be made
using a good quality coaxial cable; for example, RG58/U (50Ω) or RG59/U (75Ω).
• All 'D' type connectors attached to the unit must have back-shells that provide continuous
metallic shielding. Cable with a continuous outer shield (either foil or braid, or both)
must be used, and the shield must be bonded to the back-shell.
• The equipment must be operated with its cover on at all times. If it becomes necessary to
remove the cover, the user should ensure that the cover is correctly refitted before normal
operation commences.
Safety Compliance
EN 60950
Applicable testing is routinely performed as a condition of manufacturing on all units to ensure
compliance with safety requirements of safety standard EN 60950 Safety of Information
Technology Equipment including Electrical Business Machines.
This equipment meets the Safety of Information Technology Equipment specification as defined
in EN 60950.
Electrical Safety
The equipment is rated for operation at +12 volts DC and -12 volts DC. It has a maximum power
consumption of 4.5 Watts, and draws a maximum of 250 mA at +12 volts DC and 120 mA at -12
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Preface MN/CRS150.IOM
volts DC. The power supply current is, in all circumstances, supplied by either a single Comtech EF
Data CDM-600 Satellite Modem, or a pair of these modems.
Equipment Connection
The CRS-150 is designed for operation ONLY with the Comtech EF Data CDM-600 Satellite
Modems. These modems supply DC operating current (electronically fused and protected) and
control signals for the correct functioning of this unit. Connection to other manufacturers’
equipment could result in damage to the unit. The CRS-150 is not compatible with other Comtech
EF Data modems not listed in this manual.
European Low Voltage Directive (LVD)
The following information is applicable for the European Low Voltage Directive (2006/95/EC):
Symbol Description
<HAR>
!
Type of power cord required for use in the European Community.
CAUTION: Double-pole/Neutral Fusing
ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung
International Symbols
Symbol Definition Symbol Definition
Alternating Current
Fuse
For additional symbols, refer to Warnings, Cautions, and Notes listed earlier in
this Preface.
Federal Communications Commission (FCC)
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 Subpart B of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment.
This equipment generates, uses, and can radiate radio frequency energy. If not installed and used in
accordance with the instruction manual, it may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference; in which case,
users are required to correct the interference at the ir own expe nse.
To ensure compliance, properly shielded cables for DATA I/O must be used. More
specifically, these cables must be shielded from end to end, ensuring a
continuous shield.
Protective Earth
Chassis Ground
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Preface MN/CRS150.IOM
Telecommunications Terminal Equipment Directive
In accordance with the Telecommunications Terminal Equipment Directive 91/263/EEC, this
equipment should not be directly connected to the Public Telecommunications Network.
Environmental
The CRS-150 must not be operated in an environment where the unit is exposed to extremes of
temperature outside the ambient range 0
humid atmospheres above 95% RH; altitudes (un-pressurized) greater than 2000 meters; excessive
dust or vibration; flammable gases; and corrosive or explosive atmospheres.
Warrant y Policy
Comtech EF Data products are warranted against defects in material and workmanship for
a specific period from the date of shipment, and this period varies by product. In most
cases, the warranty period is two years. During the warranty period, Comtech EF Data will,
at its option, repair or replace products that prove to be defective. Repairs are warranted for
the remainder of the original warranty or a 90 day extended warranty, whichever is longer.
Contact Comtech EF Data for the warranty period specific to the product purchased.
For equipment under warranty, the owner is responsible for freight to Comtech EF Data
and all related customs, taxes, tariffs, insurance, etc. Comtech EF Data is responsible for
the freight charges only for return of the equipment from the factory to the owner. Comtech
EF Data will return the equipment by the same method (i.e., Air, Express, Surface) as the
equipment was sent to Comtech EF Data.
All equipment returned for warranty repair must have a valid RMA number issued prior to
return and be marked clearly on the return packaging. Comtech EF Data strongly
recommends all equipment be returned in its original packaging.
°
to 50° C (32° to 122° F); precipitation, condensation, or
Comtech EF Data Corporation’s obligations under this warranty are limited to repair or
replacement of failed parts, and the return shipment to the buyer of the repaired or replaced
parts.
Limitations of Warranty
The warranty does not apply to any part of a product that has been installed, altered,
repaired, or misused in any way that, in the opinion of Comtech EF Data Corporation,
would affect the reliability or detracts from the performance of any part of the product, or is
damaged as the result of use in a way or with equipment that had not been previously
approved by Comtech EF Data Corporation.
The warranty does not apply to any product or parts thereof where the serial number or the
serial number of any of its parts has been altered, defaced, or removed.
The warranty does not cover damage or loss incurred in transportation of the product.
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Preface MN/CRS150.IOM
The warranty does not cover replacement or repair necessitated by loss or damage from any
cause beyond the control of Comtech EF Data Corporation, such as lightning or other
natural and weather related events or wartime environments.
The warranty does not cover any labor involved in the removal and or reinstallation of
warranted equipment or parts on site, or any labor required to diagnose the necessity for
repair or replacement.
The warranty excludes any responsibility by Comtech EF Data Corporation for incidental
or consequential damages arising from the use of the equipment or products, or for any
inability to use them either separate from or in combination with any other equipment or
products.
A fixed charge established for each product will be imposed for all equipment returned for
warranty repair where Comtech EF Data Corporation cannot identify the cause of the
reported failure.
Exclusive Remedies
Comtech EF Data Corporation’s warranty, as stated is in lieu of all other warranties,
expressed, implied, or statutory, including those of merchantability and fitness for a
particular purpose. The buyer shall pass on to any purchaser, lessee, or other user of
Comtech EF Data Corporation’s products, the aforementioned warranty, and shall
indemnify and hold harmless Comtech EF Data Corporation from any claims or liability of
such purchaser, lessee, or user based upon allegations that the buyer, its agents, or
employees have made additional warranties or representations as to product preference or
use.
The remedies provided herein are the buyer’s sole and exclusive remedies. Comtech EF
Data shall not be liable for any direct, indirect, special, incidental, or consequential
damages, whether based on contract, tort, or any other legal theory.
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Preface MN/CRS150.IOM
Customer Support
Refer to p. xi in this Preface for information regarding this product’s Warranty Policy.
Contact the Comtech EF Data Customer Support Department for:
• Product support or training
• Reporting comments or suggestions concerning manuals
• Information on upgrading or returning a product
A Customer Support representative may be reached during normal business hours at:
Comtech EF Data
Attention: Customer Support Department
2114 West 7th Street
Tempe, Arizona 85281 USA
480.333.2200 (Main Comtech EF Data number)
480.333.4357 (Customer Support Desk)
480.333.2161 FAX
To return a Comtech EF Data product (in-warranty and out-of-warranty) for repair or
replacement:
• Contact the Comtech EF Data Customer Support Department during normal business
hours. Be prepared to supply the Customer Support representative with the model number,
serial number, and a description of the problem.
• Request a Return Material Authorization (RMA) number from the Comtech EF Data
Customer Support representative.
• Pack the product in its original shipping carton/packaging to ensure that the product is
not damaged during shipping.
• Ship the product back to Comtech EF Data. (Shipping charges should be prepaid.)
Online Customer Support
An RMA number can be requested electronically by accessing Comtech EF Data’s online
Support page (www.comtechefdata.com/support.asp). From this page:
• Click the Service hyperlink, then read the Return Material Authorization section for
detailed instructions on Comtech EF Data’s return procedures.
• Click [Send RMA Request] on the Support page or the RMA Request hyperlink provided
in the Service | Return Material Authorization section; fill out the Billing Information,
Return Information, and Unit to be Returned sections completely, then click [Send em ail].
– or –
• Send an e-mail providing this same detailed information to the Customer Support
Department at service@comtechefdata.com.
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Preface MN/CRS150.IOM
Notes:
xiv
1.1 Overview
Chapter 1. INTRODUCTION
Figure 1-1. CRS-150 1:1 Redundancy Switch
The CRS-150 1:1 Redundancy Switch module, shown in Figure 1-1, is
use with the CDM-600 Satellite Modem.
Designed to continuously monitor a pair of modems (Units ‘A’ and ‘B’) in a 1:1 redundant
configuration, the CRS-150 automatically switches data and IF signals from the failed online
modem to the standby mod em in the event of an equipment failure or undesired traffic condition.
Traffic paths are fully protected, and the system operator can have increased confidence that
equipment failures will not adversely affect system availability.
A 1:1 redundancy system comprises an online modem, a redundant (standby) modem, and the
CRS-150 1:1 Redundancy Switch. Note that the CRS-150 is intended for mounting at the rear of a
pair of modems in a 19” rack system.
The CRS-150 is an accessory product designed specifically for the Comtech EF
Data CDM-600 modem, and must not be used with any other equipment.
For correct operation of the CRS-150, the CDM-600 modems must have
Version 1.1.0 (or higher).
contact Comtech EF Data Customer Support to arrange to receive a free Flash
upgrade.
If the modems do not meet this requirement, please
a companion product for
Firmware
1–1
CRS-150 1:1 Redundancy Switch Revision 2
Introduction MN/CRS150.IOM
1.2 Description of Features
Figure 1-2. CRS-150 1:1 Redundancy Switch – Panel Views
Figure 1-2 illustrates the operational features
available on the front and rear panels of the
CRS-150 1:1 Redundancy Switch.
The CRS-150 includes, as standard, a universal data interface, which eliminates the need to
exchange interface cards for different applications. Supported interfaces include:
• EIA-422 (EIA530) DCE
• V.35 DCE (at rates up to 10 Mbps)
• Synchronous EIA-232 DCE (at rates up to 300 kbps)
• LVDS (at rates up to 20 Mbps)
• Balanced and Unbalanced G.703 at rates up to E2 (8.448 Mbps)
Because CDM-600 operational details are not covered in this manual, the user should refer to the
Comtech EF Data CDM-600/600L Satellite Modem Installation and Operation Manual as needed to
become familiar with all aspects of the modem before attempting redundant operations.
For Drop and Insert (D&I) applications, the second G.703 port (T1 or E1) found on the rear panel
of the CDM-600 is also provided. The operator does not have to configure the interface type –
control signals from the modems automatically perform the selection.
Clock and data signals in the transmit direction are buffered and fed to both modems in the pair
simultaneously. The Receive IF signal is split and fed to both modems. This means that both
modems see identical Tx and Rx traffic signals all the time, which permits the CRS-150 to
continually compare the fault status of both modems. If the CRS-150 sees an identical fault on
both modems at the same time, it will infer that the fault condition exists in the external system,
and eliminate an unnecessary switchover.
Only one modem in the pair (the online unit) is p ermitted to transmit its IF carrier signal at any one
instance. For total security, the offline modem mutes its Tx carrier, and the CRS-150 provides
further isolation by using an RF relay within the unit. Unlike some other 1:1 redundancy systems,
which use a passive power combiner for this function (losing approximately 3.5 dB in output power
level), the CRS-150 does not introduce any significant attenuation of output signal level.
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CRS-150 1:1 Redundancy Switch Revision 2
Introduction MN/CRS150.IOM
As a companion product for the CDM-600, the CRS-150 provides full protection for all Open
Network overhead signals (IDR Backward Alarms, Overhead Data Channels, Audio, etc.), as
well as external reference signals.
An advantage of the CRS-150 redundancy system is the Auxiliary Serial connection
between the modem pair. With the appropriate cables connecting the modems to the
CRS-150, the online unit interrogates the standby unit, at regular intervals, to determine
its configuration. If a difference in configuration is detected, the onl ine unit auto matically
reconfigures the standby unit so that the configurations are always sy nchronized. If the
standby unit is replaced, it does not have to be reprogrammed to match the online unit; the
process is entirely automatic.
Operators can manually force a switchover from the front panel of the online modem,
or via the remote control bus. Alternatively, operators may choose the conditions that
will cause an automatic switchover. Automatic switchover conditions are controlled by
two switches located on the front panel of the unit – this provides a great deal of
flexibility in switch operation. Switch Mode choices are: Unit Faults only; Unit +
Transmit Traffic Faults; Unit + Receive Traffic Faults; or Unit + Transmit + Receive
Faults.
For operation at the maximum data rate of 20 Mbps, the CDM-600 uses a
serial LVDS interface. However, many applications, including high-speed
routers, use the popular HSSI interface (using negative ECL levels). For
these applications, the Comtech EF Data CIC-20 LVDS to HSSI Interface
Converter module is available.
Also available, for conversion of LVDS to ASI, is the Comtech EF Data
CIC-35 LVDS to ASI Interface Converter module.
Either module typically connects directly to the rear of a standalone
CDM-600. For CDM-600s used in redundancy with a CRS-150, however,
either module plugs into the Overhead / Data Interface connector set on the
front panel of the CRS-150.
Like the CRS-150, the CIC-20 and CIC-35 take their operating power
directly from the modem. However, the CDM-600 modem can safely
supply enough current for only one attached device, not two. Therefore,
when connecting a CIC-20 or CIC-35 to the CRS-150, also connect an
external supply (or supplies) to the CRS-150. This low-current DC supply,
located on the front panel, provides DC voltage between 11 and 15 volts.
While a single supply may be used, for maximum reliability a second
diode-shared input is provided and use of both
‘A’ and ‘B’ supplies is
recommended.
The CIC-20 or CIC-35 module, when either is used, plugs directly into the
CRS-150 front panel – do NOT use a cable for either module.
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Introduction MN/CRS150.IOM
1.3 Functional Description
The CRS-150 connects to two modems – the online modem (identified for the purpose of this
example as Unit ‘A’), and the redundant (standby) modem (Unit ‘B’). The CRS-150 monitors the
fault status and controls the routing of data and IF signals to and from these two modems. In the
case of an equipment failure, switching automatically takes place to protect the traffic circuit.
At the heart of the CRS-150 is a Controller State Machine. Implemented in a complex
programmable logic device (CPLD), it is responsible for fault monitoring and control of switching
functions.
The CRS-150 derives its operating power from the Unit ‘A’ and Unit ‘B’ modems. A diodesharing arrangement with a current-sharing circuit ensures that, in normal operation, power is
taken equally from the two modems. However, in the event that one of the two units is removed,
the remaining modem can supply all of the current requirement.
The modems supply +12 volts DC (at a combined total of 250 mA max) and -12 volts DC (at a
combined total of 120 mA max). Maximum power consumption occurs in a serial LVDS mode at
maximum data rate (20 Mbps). Power consumption in EIA-232 modes is approximately 40% of
the maximum values. The modem employs electronic fuses, which prevent excessive current
from being drawn by the CRS-150, should an anomalous condition occur.
Transmit Clock and Data signals entering the unit via the Data Interface are buffered and fed to
both units simultaneously. This ensures that the standby unit sees the same traffic conditions as
the online unit. Receive Data and Clock signals coming from the online modem are routed, using
signal relays, to the Data Interface. In the event that a switchover occurs, these relays switch so
the standby unit then supplies the Data and Clock signals.
As only one modem in the pair (the online unit) is permitted to transmit its IF carrier signal at any
one instant, the standby unit is forced to disable its TX carrier by asserting the TX Carrier Off
signal at the Data Interface. In addition, the CRS-150 provides further isolation (and security) by
using an RF relay within the unit. Unlike some other 1:1 redundancy systems that use a passive
power combiner on the two Tx IF ports (and hence lose approximately 3.5 dB in output power
level) the CRS-150 does not introduce any significant attenuation of output signal level.
The Receive IF signal is fed to both units simultaneously using an internal power divider. This
does introduce a loss of approximately 3.5 dB but, given the wide dynamic range of the
demodulator in the CDM-600, this is not considered to be a problem. The advantage of this
scheme is that the demodulators in both the online and standby units are locked; therefore, if a
switchover does occur there will be no delay while waiting for the demodulator to acquire lock –
this greatly speeds the time for the switchover to occur.
Fault status information is fed from each of the two modems via the Data Interface connector.
The Controller State Machine decides, based on the fault status, which of the two modems – Unit
‘A’ or Unit ‘B’ – is to be the online modem. It will assert a control signal to the standby modem,
which mutes its Tx IF carrier, and simultaneously indicates to the microcontroller within the
standby unit that the modem is no longer online. This results in the “ON LINE” LED on the nowoffline modem’s front panel being extinguished. This status is also reported over the remote
control bus, so an external M&C system can determine the state of the redundancy system. At the
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CRS-150 1:1 Redundancy Switch Revision 2
Introduction MN/CRS150.IOM
same time, the “On-Line” LED – i.e., the green Unit ‘A’ LED or the yellow Unit ‘B’ LED – will
illuminate on the CRS-150 front panel to indicate which modem is online.
1.4 Summary of Specifications
Equipment Type 1:1 Redundancy Switch
Modems Supported Comtech EF Data CDM-600 Digital Satellite Modem
Operating Modes
Architecture
Switch Conditions Switchover initiated following:
Fault detection time 1 second maximum
Switchover time Within 0.5 seconds of fault detection
Main Data Interfaces
• Fully Automatic
• Manual (via the front panel of the Online Modem, or via the Modem’s remote control
interface)
• Full bridging architecture, with configuration synchronization
• Tx Clock and Data signals fed to both Online and Standby units
• Rx IF signal fed to both Online and Standby units
• Continuous fault comparison of Online and Standby units (The configuration of Online
and Standby units is synchronized via the Auxiliary Serial link between the two
Modems)
• Unit faults only, or:
• Unit faults or Receive Traffic Faults, or:
• Unit faults or Transmit Traffic Faults, or:
• Unit faults or Receive or Transmit Traffic Faults
• RS422/EIA530 DCE (25 pin D-type female, pinout per EIA530) to 10 Mbps
• V.35 DCE to 10 Mbps
• Synchronous RS232 to 300 kbps
• Serial LVDS to 20 Mbps
• A standard HSSI interface is provided with the addition of the optional Comtech CIC-20
LVDS/HSSI Interface Converter module, for operation up to 20 Mbps
G.703 Interfaces
Overhead Interface Intelsat IESS-308/309/310 Open Network overhead signals, including:
Audio 2 x 4-wire 600 Ω audio interface, per Intelsat IESS-308 (9 pin D-type female)
IDR Backward
Alarms
External Reference
1–5
• G.703, T1, E1, T2 and E2, balanced and unbalanced (BNC connectors for 75Ω
unbalanced, and 15 pin D-type for 120Ω balanced)
• Note that for T1 and E1 Drop and Insert applications the unit supports Rx, Tx
connections, as well as Drop Data Out (DDO) and Insert Data In (IDI)
• ‘G.703-like’ signals at 512 kbps and 1024 kbps (through DDO and IDI ports)
• IDR Overhead Data Channels (64 kHz, 8kHz, and Octet clocks)
• IBS ESC and High-Rate ESC
• Balanced External Reference Input
• IDR Backward Alarm Inputs (25 pin D-type male)
Backward Alarm Outputs BA-1 through BA-4 (Form C relays) per Intelsat IESS-308 (15
pin D-type female)
• 75Ω BNC, unbalanced input
• 120Ω balanced input
CRS-150 1:1 Redundancy Switch Revision 2
Introduction MN/CRS150.IOM
IF Switching/
Splitting
IF Impedance
• Transmit IF: Switched by RF relay (0.3 dB max loss)
• Receive IF: Passive power splitting (3.5 dB max loss)
• Optimized for 50Ω (> 20 dB return loss on external IF ports)
• 75Ω supported with the use of external RF transformers (supplied)
IF Connectors BNC female
IF Frequency range 52-176 MHz
Weight 4.6 lbs (2.1 kg)
Dimensions 1.75 inches (44.5 mm) high, 19 inches (482.5 mm) wide, 4.2 inches (107 mm) deep
(excluding connectors)
Power requirements 4.5 Watts maximum
+ 12 volts DC @ 250 mA (max)
-12 volts DC @ 120 mA (max)
• Power is supplied by the Online and Standby Modems, and the unit current shares
when both an >A= and >B= unit are present. These power supplies are electronically
fused and protected.
• A pair of auxiliary DC inputs are provided for powering external equipment connected to
the main data interface, such as a CIC-20 Interface Converter.
Approvals
• ‘CE’ as follows:
o EN 55022 Class B (Emissions)
o EN 50082-1 (Immunity)
o EN 60950 (Safety)
• FCC Part 15 Class B
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Introduction MN/CRS150.IOM
1.5 Dimensional Envelope
Figure 1-3. CRS-150 Dimensional Envelope
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Introduction MN/CRS150.IOM
Notes:
1–8
Chapter 2. INSTALLATION
2.1 Unpacking and Inspecting the Shipment
Figure 2-1. Unpacking and Inspecting the Shipment
The CRS-150 1:1 Redundancy Switch and its Installation and Operation Manual were packaged
and shipped in a reusable cardboard carton containing protective foam spacing.
This equipment contains parts and assemblies sensitive to damage by
Electrostatic Discharge (ESD). Use ESD precautionary procedures when
handling the equipment.
Once opened, inspect the shipment:
Step Task
1 Keep all shipping materials for storage or reshipment.
2 Check the packing list to ensure the shipment is complete.
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Installation MN/CRS150.IOM
3
4
Inspect the equipment for any possible damage incurred during shipment. Contact the
carrier and Comtech EF Data immediately to submit a damage report if damag e is evident.
Review the Installation and Operation Manual carefully to become familiar
with operation.
5
Proceed to Section 2.2 Rack-Mounting the CRS-150.
2.2 Rack-Mounting the CRS-150
The CRS-150 is designed to be mounted into the rear of a rack, behind the CDM-600 modems.
This typical configuration is shown in Figure 2-1.
Figure 2-2. T
Once the CRS-150 has been installed into operating position, it will be ready for configuration and
cabling connections. Please refer to Chapter 4. MODEM AND SWITCH CONFIGURATION
and Chapter 5. CABLES AND CONNECTIONS for further information.
ypical CDM-600/CRS-150 1:1 Redundancy Installation
2–2
Chapter 3. CONNECTOR PINOUTS
3.1 Connector Overview
Front Panel View
Rear Panel View
Figure 3-1. CRS-150 Connectors
The front and rear panels of the CRS-150 1:1 Redundancy Switch are shown in Figure 3-1.
The front panel connectors provide all necessary to connect all equipment external to the 1:1
redundancy setup. The rear panel connectors of the CRS-150 1:1 Redundancy Switch provide all
the connections between the CRS-150 and the two CDM-600 modems in the 1:1 pair.
Also optionally available are two interface converter modules: The CIC-20, which converts
LVDS to HSSI, and the CIC-35, which converts LVDS to ASI. Full information on either of
these products is available from their respective operation manuals; for the purpose of this
chapter, only the User Data Interface pinouts are documented.
On the next page, Table 3-1 summari
rear, or data interface) and service function.
The European EMC Directive (EN55022, EN50082-1) requires using properly
shielded cables for DATA I/O. These cables must be double-shielded from
end-to-end, ensuring a continuous ground shield.
zes these connectors, grouped according to location (front,
3–1
CRS-150 1:1 Redundancy Switch Revision 2
–
A
A
–
–
A
A
A
A
A
Connector Pinouts MN/CRS150.IOM
Table 3-1. CRS-150 External Connectors (Front and Rear Panel)
Connector Group
(Chapter 3 Sect. Ref.)
Front Panel
(Sect. 3.2)
Rear Panel
(Sect. 3.3)
Interface
Converters
(Sect 3.4)
IF
(Sect. 3.2.1)
Terrestrial Data
(Sect. 3.2.2)
Utility
(Sect. 3.2.3)
Power
(Sect 3.2.4)
IF
(Sect. 3.3.1)
Terrestrial Data
(Sect. 3.3.2)
Utility
(Sect. 3.3.3)
Ground
(Sect. 3.3.4)
CIC-20
(Sect. 3.4.1)
CIC-35
(Sect. 3.4.2)
CA-0000268
(Sect. 3.4.3)
Name Connector Type Function
Receive IF BNC 50Ω female
Transmit IF BNC 50Ω female
Overhead 25-pin Type ‘D’ male
Data Interface 25-pin Type ‘D’ female Serial Synchronous Data Input/Output
udio 9-pin Type ‘D’ female
Balanced G.703 15-pin Type ‘D’ female
Rx G.703 BNC 75Ω female
G.703
Tx G.703 BNC 75Ω female
Data
IDI BNC 75Ω female
DDO BNC 75Ω female
Ext Ref BNC 50Ω female
IDR Alarms 15-pin Type ‘D’ female Form C Alarms (backward alarm outputs)
Aux DC Input
Tx IF A
Tx IF B
Rx IF A
Rx IF B
Balanced G.703
G.703
Data
Balanced G.703 B
udio A
udio B
Overhead A
Overhead B
Data Interface A
Data Interface B
IDR Alarms A
IDR Alarms B
ux Serial A
ux Serial B
Ext Ref A
Ext Ref B
Ground #10-32 stud Common Chassis Ground
L VDS Æ HSSI Interface
Converter Module
LVDS Æ ASI Interface
Converter Module
Adapter DB-15F Æ RJ-48F G.703 Balanced E1/T1
2.1mm socket
(11-15 VDC)
BNC female RF Input
BNC female RF Output
15-pin Type ‘D’ male
9-pin Type ‘D’ female ADPCM Audio Input/Output
25-pin Type ‘D’ male
25-pin Type ‘D’ female Serial synchronous data Input/Output
15-pin Type ‘D’ female Form C Alarms (backward alarm outputs)
USB Type ‘A’ female Serial RS232 Input/Output
BNC 50Ω female External Baseband Output
50-pin Type ‘HD’ female HSSI data Input/Output
BNC 75Ω female
RF Input
RF Output
Intelsat Overhead
Overhead ESC @EIA-232; IDR Backward Alarm
DPCM Audio Input/Output
G.703 Balanced T1 (1.544 Mps) / E1 (2.048 Mbps) /
T2 (6.312 Mbps)
G.703 Unbalanced E1 (2.048 Mbps) Receive
G.703 Unbalanced E1 (2.048 Mbps) Transmit
Insert Data In
Drop Data Out
External Baseband Input
Power for External Devices
G.703 Balanced T1 (1.544 Mps) / E1 (2.048 Mbps) /
T2 (6.312 Mbps)
Intelsat overhead – 64kbps EIA-422, 1/16 IBS
overhead ESC @EIA-232; IDR backward alarm
ASI Input
ASI Output
64kbps EIA-422, 1/16 IBS
G.703 Unbalanced E1 (2.048 Mbps)
G.703 Unbalanced E1 (2.048 Mbps)
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Connector Pinouts MN/CRS150.IOM
3.2 Front Panel Connectors
Unless otherwise noted, the connectors featured on the front panel of the CRS-150 are intended
for connection to all equipment external to the 1:1 redundancy setup.
3.2.1 Front Panel IF Connectors – Receive IF and Transmit IF, 50Ω BNC
The Receive IF and Transmit IF port connectors are both 50Ω Type
‘BNC’ female. The electrical impedance presented by these connectors is
controlled internally by an RF-switching arrangement – this selection
between 50Ω and 75Ω is controlled either via the CDM-600 front panel
menus, or via the CDM-600 remote control bus.
The CRS-150 has been optimized to work with 50Ω systems, and it is very
important that 50Ω cables are used between the CRS-150 and the traffic
modems. For users with a 75Ω system, 50Ω-to-75Ω transformers are supplied
with the CRS-150 that should be connected to the external IF ports.
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Connector Pinouts MN/CRS150.IOM
3.2.2 Front Panel Terrestrial Data Connectors
3.2.2.1 Overhead Data Connector, DB-25M
The 25-pin ‘D’ Type male (DB-25M) Overhead data connector is used for
passing components of Intelsat specified overhead frame structures. These
include 64 kbps EIA-422 and 1/16 IBS overhead ESC at EIA-232. The
IDR backward alarm inputs are found on this connector.
Overhead Data Connector (DB-25M)
Pin # Signal Function Signal Name Direction
14 IDR 64 kbps ESC TX Data + TX-422DAT-B In
2 IDR 64 kbps ESC TX Data - TX-422DAT-A In
12 IDR 64 kHz ESC TX Clock + TX-422CLK-B Out
15 IDR 64 kHz ESC TX Clock - TX-422CLK-A Out
11 IDR 1 kHz TX Octet Clock + TX-OCT-B Out
24 IDR 1 kHz TX Octet Clock - TX-OCT-A Out
16 IDR 64 kbps ESC RX Data + RX-422DAT-B Out
3 IDR 64 kbps ESC RX Data - RX-422DAT-A Out
9 IDR 64 kHz ESC RX Clock + RX-422CLK-B Out
17 IDR 64 kHz ESC RX Clock - RX-422CLK-A Out
19 IDR 1 kHz RX Octet Clock + RX-OCT-B Out
4 IDR 1 kHz RX Octet Clock - RX-OCT-A Out
20 Balanced Ext. Ref. Clock + EXT-CLK-B In
23 Balanced Ext. Ref. Clock - EXT-CLK-A In
13 IBS ESC RS232 TX Data TX-232-DATA In
22 IBS ESC RS232 TX Clock TX-232-CLK Out
8 IBS ESC RS232 RX Data RX-232-DATA Out
10 IBS ESC RS232 RX Clock RX-232-CLK Out
5 IBS TX High-Rate ESC Data TX-ASYNC In
6 IBS RX High-Rate ESC Data RX-ASYNC Out
1 IDR Back Alarm 1 H/W input BW-IN1 In
18 IDR Back Alarm 2 H/W input BW-IN2 In
21 IDR Back Alarm 3 H/W input BW-IN3 In
25 IDR Back Alarm 4 H/W input BW-IN4 In
7 Signal Ground Ground --
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Connector Pinouts MN/CRS150.IOM
3.2.2.2 Data Interface Connector, DB-25F
The 25-pin ‘D’ Type female (DB-25F) Data Interface connector
connects to customer’s terrestrial equipment. It conforms to the
EIA-530 pinout, which allows for connection of different electrical
standards, including EIA-422, V.35, and EIA-232. A shielded 25-pin ‘D’ type connection provides
a very solid solution to EMC problems, unlike the sometimes-used V.35 Winchester connector.
It is the user’s responsibility to provide the appropriate cables to connect to
Pin # Generic Signal Description Direction
2 TX Data A DTE to Modem SD A SD A BA 103
14 TX Data B DTE to Modem SD B SD B -- 103
24 TX Clock A DTE to Modem TT A SCTE A DA 113
11 TX Clock B DTE to Modem TT B SCTE B -- 113
15 INT TX Clock A Modem to DTE ST A SCT A DB 114
12 INT TX Clock B Modem to DTE ST B SCT B -- 114
3 RX Data A Modem to DTE RD A RD A BB 104
16 RX Data B Modem to DTE RD B RD B -- 104
17 RX Clock A Modem to DTE RT A SCR A DD 115
9 RX Clock B Modem to DTE RT B SCR B -- 115
8 Receiver Ready A Modem to DTE RR A RLSD * CF 109
10 Receiver Ready B Modem to DTE RR B -- -- 109
23
7 Signal Ground -- SG SG AB 102
1 Shield -- Shield FG AN 101
Notes:
this EIA-530 connector.
Data Interface Connector (DB-25F)
EIA-422
External Carrier Off
(EIA-232 ‘1' or TTL ‘low’ )
EIA-530
LVDS
DTE to Modem -- -- -- --
V.35 EIA-232 Circuit #
1. Receiver Ready is an EIA-232 -level control signal on a V.35 interface.
2. DO NOT connect signals to pins which are not shown - these pins are reserved for
use by the redundancy system.
3. ‘B’ signal lines are not used for EIA-232 applications.
4. For X.21 operation, use the EIA-422 pins, but ignore RX Clock if the Modem is DTE,
and ignore TX clocks if the Modem is DCE.
5. For IDR operation using G.703, this primary interface becomes the 8 kbps EIA-422
overhead channel.
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Connector Pinouts MN/CRS150.IOM
3.2.2.3 Audio Connector, DB-9F
The 9-pin ‘D’ Type female (DB-9F) Audio connector is used for the two 32
kbps ADPCM audio inputs and outputs (600Ω transformer coupled, balanced
signals). These can be used for both ESC voice circuits in IDR mode, or as the
primary data (FAST option).
Audio Connector (DB-9F)
Pin # Signal Function Direction
1 Tx Audio 1 (+) In
6 Tx Audio 1 (-) In
2 Rx Audio 1 (+) Out
7 Rx Audio 1 (-) Out
8 Tx Audio 2 (+) In
4 Tx Audio 2 (-) In
9 Rx Audio 2 (+) Out
5 Rx Audio 2 (-) Out
3 Common
3.2.2.4 G.703 Connectors
3.2.2.4.1 Balanced G.703 Interface Connector, DB-15F
The 15-pin ‘D’ Type female (DB-15F) P7 Balanced G.703 connection is used
for balanced operation at the G.703 data rates of T1 (1.544 Mbps), E1 (2.048
Mbps), or T2 (6.312 Mbps).
Balanced G.703 Connector (DB-15F)
Pin # Signal Function Name Direction
1* Drop Data Input ( - ) DDI– In
9* Drop Data Input (+) DDI+ In
2 Ground GND
10 Not Used
3* Insert Data Output ( - ) IDO– Out
11* Insert Data Output (+) IDO+ Out
4 Ground GND
12 Drop Data Output ( - ) DDO– Out
5 Drop Data Output (+) DDO+ Out
13 Insert Data Input ( - ) IDI– In
6 Insert Data Input (+) IDI+ In
14 Not Used
7 Not Used
15 Not Used
8 Not Used
*Use for all non-Drop and Insert and T2/E2 balanced applications.
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Connector Pinouts MN/CRS150.IOM
3.2.2.4.2 Rx and Tx (Unbalanced) G.703 Connectors, 75Ω BNC
Two 75Ω BNC female connectors are provided for unbalanced operation at the
G.703 data rates of E1 (2.048 Mbps), T2 (6.312 Mbps), or E2 (8448 kbps).
BNC Connector Description Direction
Rx G.703 Rx G.703 (Unbalanced E1) Out
Tx G.703 Tx G.703 (Unbalanced E1) In
3.2.2.4.3 IDI, DDO Connectors, 75Ω BNC
Two female BNC 75Ω connectors are provided for Drop and Insert (D&I)
unbalanced operation at the G.703 data rate of E1 (2.048 Mbps). These are the
Insert Data In (IDI) and Drop Data Out (DDO) ports.
BNC Connector Description Direction
IDI
DDO Drop Data Output Out
Insert Data Input In
Another function of these connectors is for auxiliary G.703 data paths operating at 512, 1024, and
2048 kbps. When these rates are selected, the IDI port is the TX terrestrial G.703 input and the
DDO port is the RX G.703 output.
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Connector Pinouts MN/CRS150.IOM
3.2.3 Front Panel Utility Connectors
3.2.3.1 Ext Ref, 50Ω BNC
This is 50Ω BNC female connector is used for operating an external station reference. It
requires an EIA-422 compatible level, so this unbalanced input should have a zero volt
(0V) offset and a swing of at least ±2V into the 120Ω termination provided.
3.2.3.2 IDR Alarms Connector, DB-15F
The 15-pin Type ‘D’ female (DB-15F) IDR Alarms interface connection
provides four Form-C backward alarm outputs specified by Intelsat.
IDR Alarms Connector (DB-15F)
Pin # Signal Function Name
2
9
1
10 TBD MON-A
4
11
3
6
13
5
14 TBD MON-B
8
15
7
12 Ground GND
Backward Alarm 1 is active
Backward Alarm 1 is not active
Backward Alarm 2 is active
Backward Alarm 2 is not active
Backward Alarm 3 is active
Backward Alarm 3 is not active
Backward Alarm 4 is active
Backward Alarm 4 is not active
BA-1-NO
BA-1-COM
BA-1-NC
BA-2-NO
BA-2-COM
BA-2-NC
BA-3-NO
BA-3-COM
BA-3-NC
BA-4-NO
BA-4-COM
BA-4-NC
3.2.4 Front Panel Power Connections – Aux DC Inputs
The front panel of the CRS-150 incorporates two independent DC inputs (using 2.1
mm sockets, with the outer conductor grounded). Comtech EF Data can supply the
appropriate AC/DC supply, complete with IEC power input connector (Part number
PS/AC18W01P01).
For more information about Comtech EF Data accessories that make use of this interface, see
Chapter 1. INTRODUCTION.
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CRS-150 1:1 Redundancy Switch Revision 2
Connector Pinouts MN/CRS150.IOM
3.3 Rear Panel Connectors
The rear panel connectors of the CRS-150 1:1 Redundancy Switch provide all the connections
between the CRS-150 and the two CDM-600 modems in the 1:1 pair.
With the exception of the mandatory main connections between the 25-pin data
ports (Overhead A/B, Data Interface A/B), the remaining connections are purely
optional.
3.3.1 Rear Panel IF Connectors – Receive IF and Transmit IF A/B, 50Ω BNC
The Receive IF and Transmit IF A and B port connectors are all
50Ω Type ‘BNC’ female. The electrical impedance presented
by these connectors is controlled internally by an RF-switching
arrangement – this selection between 50Ω and 75Ω is controlled
either via the CDM-600 front panel menus, or via the CDM-600
remote control bus.
Observe the following:
BNC Connector Description Direction
Tx IF A RF Input In
Tx IF B RF Input In
Rx IF A RF Output Out
Rx IF B RF Output Out
The CRS-150 has been optimized to work with 50Ω systems, and it is very
important that 50Ω cables are used between the CRS-150 and the traffic
modems. For users with a 75Ω system, 50Ω-to-75Ω transformers are supplied
with the CRS-150 that should be connected to the external IF ports.
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Connector Pinouts MN/CRS150.IOM
3.3.2 Rear Panel Terrestrial Data Connectors
3.3.2.1 Balanced G.703 A and B Connectors, DB-15M
The 15-pin ‘D’ Type female (DB-15F) Balanced G.703 A and B connectors
are used for balanced operation at the G.703 data rates of T1 (1.544 Mbps),
E1 (2.048 Mbps), or T2 (6.312 Mbps).
Balanced G.703 A and B Connectors (DB-15F)
Pin # Signal Function Name Direction
1* Drop Data Input ( - ) DDI– Out
9* Drop Data Input (+) DDI+ Out
2 Ground GND
10 Not Used
3* Insert Data Output ( - ) IDO– In
11* Insert Data Output (+) IDO+ In
4 Ground GND
12 Drop Data Output ( - ) DDO– In
5 Drop Data Output (+) DDO+ In
13 Insert Data Input ( - ) IDI– Out
6 Insert Data Input (+) IDI+ Out
14 Not Used
7 Not Used
15 Not Used
8 Not Used
*Use for all non-Drop and Insert and T2/E2 balanced applications.
In order to simplify the cabling between the CDM-600 modems and the CRS-150
Redundancy Switch, all G.703 signals are carried between modems and switch
on the BALANCED connections, regardless of the choice of balanced/
unbalanced connectors on the CRS-150 front panel.
The user should not be concerned about this – the modem signals the
appropriate port type (balanced or unbalanced) to the CRS-150, so correct
operation of the ports is assured.
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3.3.2.2 Audio A and B Connectors, DB-9F
The 9-pin ‘D’ Type female (DB-9F) Audio A and B connectors are used for the
two 32 kbps ADPCM audio inputs and outputs (600Ω transformer coupled,
balanced signals). These can be used for both ESC voice circuits in IDR mode, or
as the primary data (FAST option).
Audio A and B Connectors (DB-9F)
Pin # Signal Function Direction
1 Tx Audio 1 (+) Out
6 Tx Audio 1 (-) Out
2 Rx Audio 1 (+) In
7 Rx Audio 1 (-) In
8 Tx Audio 2 (+) Out
4 Tx Audio 2 (-) Out
9 Rx Audio 2 (+) In
5 Rx Audio 2 (-) In
3 Common
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3.3.2.3 Overhead Data A and B Connectors, DB-25M
The 25-pin ‘D’ Type male (DB-25M) Overhead Data A and B connectors
are used for passing components of Intelsat specified overhead frame
structures. These include 64 kbps EIA-422 and 1/16 IBS overhead ESC at
EIA-232. The IDR backward alarm inputs are found on this connector.
Overhead Data A and B Connectors (DB-25M)
Pin # Signal Function Signal Name Direction
14 IDR 64 kbps ESC TX Data + TX-422DAT-B Out
2 IDR 64 kbps ESC TX Data - TX-422DAT-A Out
12 IDR 64 kHz ESC TX Clock + TX-422CLK-B In
15 IDR 64 kHz ESC TX Clock - TX-422CLK-A In
11 IDR 1 kHz TX Octet Clock + TX-OCT-B In
24 IDR 1 kHz TX Octet Clock - TX-OCT-A In
16 IDR 64 kbps ESC RX Data + RX-422DAT-B In
3 IDR 64 kbps ESC RX Data - RX-422DAT-A In
9 IDR 64 kHz ESC RX Clock + RX-422CLK-B In
17 IDR 64 kHz ESC RX Clock - RX-422CLK-A In
19 IDR 1 kHz RX Octet Clock + RX-OCT-B In
4 IDR 1 kHz RX Octet Clock - RX-OCT-A In
20 Balanced Ext. Ref. Clock + EXT-CLK-B Out
23 Balanced Ext. Ref. Clock - EXT-CLK-A Out
13 IBS ESC RS232 TX Data TX-232-DATA Out
22 IBS ESC RS232 TX Clock TX-232-CLK In
8 IBS ESC RS232 RX Data RX-232-DATA In
10 IBS ESC RS232 RX Clock RX-232-CLK In
5 IBS TX High-Rate ESC Data TX-ASYNC Out
6 IBS RX High-Rate ESC Data RX-ASYNC In
1 IDR Back Alarm 1 H/W input BW-IN1 Out
18 IDR Back Alarm 2 H/W input BW-IN2 Out
21 IDR Back Alarm 3 H/W input BW-IN3 Out
25 IDR Back Alarm 4 H/W input BW-IN4 Out
7 Signal Ground Ground --
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3.3.2.4 Data Interface A and B Connectors, DB-25F
The 25-pin ‘D’ Type female (DB-25F) Data Interface A and B connectors
conduct data input and output signals to and from the modem, and
connects to customer’s terrestrial equipment.. It conforms to the EIA-530
pinout, which allows for connection of different electrical standards,
including EIA-422, V.35, and EIA-232. A shielded 25-pin ‘D’ type
connection provides a very solid solution to EMC problems, unlike the
sometimes-used V.35 Winchester connector.
Pin # Signal Description Direction
2 Transmit Data A Switch to Modem SD A SD A BA 103
14 Transmit Data B Switch to Modem SD B SD B - 103
24 Transmit Clock A Switch to Modem TT A SCTE A DA 113
11 Transmit Clock B Switch to Modem TT B SCTE B - 113
15 Internal Transmit Clock A Modem to Switch ST A SCT A DB 114
12 Internal Transmit Clock B Modem to Switch ST B SCT B - 114
3 Receive Data A Modem to Switch RD A RD A BB 104
16 Receive Data B Modem to Switch RD B RD B - 104
17 Receive Clock A Modem to Switch RT A SCR A DD 115
9 Receive Clock B Modem to Switch RT B SCR B - 115
8 Receiver Ready A Modem to Switch RR A RLSD * CF 109
10 Receiver Ready B Modem to Switch RR B - - 109
23
18 Fused +12 volts Modem to Switch - - - -
25 Fused -12 volts Modem to Switch - - - -
21 Bal/Unbal interface Modem to Switch - - - -
20 1:1 Switch present Switch to Modem - - - -
6 Unit fault Modem to Switch - - - -
13 Tx Traffic fault Modem to Switch - - - -
5 Rx Traffic fault Modem to Switch - - - -
7 Signal Ground - SG SG AB 102
1 Shield - Shield FG AN 101
It is the user’s responsibility to provide the appropriate cables to connect to this EIA-530
connector.
Data Interface A and B Connectors (DB-25F)
EIA-422
External Carrier Off
(EIA-232 ‘1’ or TTL ‘low’ )
EIA-530
LVDS
Switch to Modem - - - -
V.35 EIA-232 Circuit #
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3.3.3 Rear Panel Utility Connectors
3.3.3.1 IDR Alarms A and B Connectors, DB-15F
The 15-pin Type ‘D’ female (DB-15F) IDR Alarms A and B interface connectors
provide four Form-C backward alarm outputs specified by Intelsat.
Pin # Signal Function Name
IDR Alarms A and B Connectors (DB-15F)
Backward Alarm 1 is active
2
9
Backward Alarm 1 is not active
1
10 TBD MON-A
Backward Alarm 2 is active
4
11
Backward Alarm 2 is not active
3
Backward Alarm 3 is active
6
13
Backward Alarm 3 is not active
5
14 TBD MON-B
Backward Alarm 4 is active
8
15
Backward Alarm 4 is not active
7
12 Ground GND
BA-1-NO
BA-1-COM
BA-1-NC
BA-2-NO
BA-2-COM
BA-2-NC
BA-3-NO
BA-3-COM
BA-3-NC
BA-4-NO
BA-4-COM
BA-4-NC
3.3.3.2 Aux Serial A and B Receptacles, USB Type ‘A’
Although these ports use USB connectors, the signals are not USB-compatible.
DO NOT connect either of these ports to the USB port of a PC or other
computing device.
The USB Type ‘A’ Aux Serial A and B receptacles are additional EIA-232 serial
ports, connected to the modem’s USB Type ‘B’ Aux Serial ports when part of a 1:1
redundant pair.
Aux Serial Receptacles A and B (USB Type ‘A’)
Pin # Description Direction
1 Ground --
2 EIA-232 TX Data Out
3 EIA-232 RX Data In
4 Ground --
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3.3.3.3 Ext Ref A and B Connectors, 50Ω BNC
The Ext Ref A and Ext Ref B connectors are 50Ω BNC female connectors used
to permit the connection of an external reference input signal.
3.3.4 Ground Connection
A #10-32 stud is used for connecting a common chassis ground among equipment.
3.4 Data Interface Converter Modules / Adapters
For operation at the maximum data rate of 20 Mbps, the CDM-600 uses a
serial LVDS interface. However, many applications, including high-speed
routers, use the popular HSSI interface (using negative ECL levels). For
these applications, the Comtech EF Data CIC-20 LVDS to HSSI Interface
Converter module is available.
Also available, for conversion of LVDS to ASI, is the Comtech EF Data
CIC-35 LVDS to ASI Interface Converter module.
Either module typically connects directly to the rear of a standalone
CDM-600. For CDM-600s used in redundancy with a CRS-150, however,
either module plugs into the Overhead / Data Interface connector set on the
front panel of the CRS-150.
For conversion of the Balanced G.703 connection from a DB-15M connector
to an RJ-48 modular jack, the optional CA-0000268 Adapter may be plugged
into the Balanced G.703 connector on the front panel of the CRS-150.
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3.4.1 CIC-20 HSSI Connector, HD-50F
The 50-pin type Mini-D/SCSI2 female HSSI connector on the optional
CIC-20 LVDS to HSSI Interface Module provides HSSI data transmission
as converted for use from the User Data (LVDS) interface.
Note: For the CIC-20’s Overhead user-side connector pinout table, see
Sect. 3.2.2.1 in this chapter. For further details about the CIC-20, refer to
that product’s user manual.
Observe the following:
Signal Function HSSI Signal EIA-613 Circuit Pin # (+, -) Circuit Direction
Signal Ground SG 102 1, 26
Receive Timing RT 115 2, 27 From DCE
DCE Available CA 107 3, 28 From DCE
Receive Data RD 104 4, 29 From DCE
Loopback Circuit C LC undefined 5, 30 Not used
Send Timing ST 114 6, 31 From DCE
Signal Ground SG 102 7, 32
DTE Available TA 108/2 8, 33 To DCE
Terminal Timing TT 113 9, 34 To DCE
Loopback Circuit A LA 143 10, 35 Not used
Send Data SD 103 11, 36 To DCE
Loopback Circuit B LB 144 12, 37 Not used
Signal Ground SG 102 13, 38
Reserved (to DCE)
Reserved (to DTE)
Test Mode TM 142 24, 49 Not used
Signal Ground SG 102 25, 50
3.4.2 CIC-35 ASI Connectors, 75Ω BNC
The ASI In and Out connectors on the optional CIC-35 LVDS to ASI
Interface Module are 75Ω BNC female connectors for user receive and
transmit of ASI data as converted for use from the User Data (LVDS)
interface.
Note: For the CIC-35’s Overhead user-side connector pinout table, see
Sect. 3.2.2.1 in this chapter. For further details about the CIC-35, refer to
that product’s user manual.
14,15,17, 18, 39
- 43
16, 20-23, 45-
48
Not used
Not used
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3.4.3 E1/T1 RJ-48 Connection via Balanced G.703 Interface Connector
For E1/T1 operation via an RJ-48 user interface, the optional CN-0000268 Adapter, shown in
Figure 3-2, may
DB-15F connector on the front panel of the CRS-150 to an RJ-48 female connection.
User Interface Side (RJ-48 F) Switch Interface Side (DB-15M)
be purchased from Comtech EF Data to adapt the Balanced E1/T1 G.703
CN-0000268 Adapter Pin Assignments
Pin #
RJ-48 (User Side) DB-15M (Modem Side)
1 9
2 1
3 2
4 11
5 3
6 4
Signal Name
Tx+
Tx-
GND
Rx+
Rx-
GND
Note: Pins 7 and 8 on the RJ-48 side, and pins 5-8, 10, and 12-15
on the DB-15 side, are not used.
Figure 3-2. CN-0000268 DB-15M Æ RJ-48F Adapter for E1/T1 Operation
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Notes:
3–18
4.1 Overview
When assembling a Comtech EF Data 1:1 Redundancy System, in addition to purchasing the
desired modem pair (one Redundant modem, one Traffic modem) and the CRS-150 1:1
Redundancy Switch, the user is also required to purchase all cabl es and components required for
interconnection of the redundant configuration to various interfaces (i.e., control, IF, and data).
The sections that follow in this chapter provide specific interface examples that identify the
individual redundancy kit item(s) required to assemble that interface.
1. It is physically impossible to connect all available data interface solutions
Chapter 4. CABLES AND
CONNECTIONS
within a single 1:1 redundancy system at a given time. For example, when
using the CDM-600 in a 1:1 system, the user is unable to establish an
EIA-422/232 interface together with an HSSI interface. Therefore, the
quantities of cables and accessories furnished with each redundancy kit h ave
been predetermined with this operational limitation taken into consideration.
2. It is essential to ensure that the data and IF connections, both Rx and Tx, are
made correctly. For example, the Transmit IF from Unit ‘A’ connects to the Tx
IF port ‘A’ on the CRS-150, and Unit ‘B’ to ‘B’, and the same for the Rx IF
connections. Failure to observe this requirement will result in the system
malfunctioning.
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4.2 Cabling to the CDM-600
Examples for connecting a pair of CDM-600 modems together with the CRS-150 are provided in
this section. Once all connections have been made, refer to Chapter 5. MODE M AND SWITCH
CONFIGURATION in this manual – as well as the CDM-600 Satellite Modem In stallation and
Operation Manual – to enable 1:1 operation.
The following cables, purchased separately unless noted otherwise, are utilized with all possible
CDM-600 data interface configurations:
CRS-150 Æ CDM-600 1:1 Redundancy
CEFD Part # Description
CA/USBCA/WR9040-4 Data Cable, DB-25F Æ DB-25F (4’)
CA/WR9378-4 Data Cable, DB-9M Æ DB-9M (4’)
CA/WR9563-4 Data Cable, DB-15M Æ DB-15M (4’) Modem Æ Switch G.703
CA/WR9564-4 Data Cable, DB-15M Æ DB-15M (4’)
PL/0813-4 Coax Cable, Type ‘BNC’ 75Ω (4’)
PL/0946-1 IF (Tx/Rx) Coax Cable, Type ‘BNC’ 50Ω (4’)
PL/6233 Data/Control Cable, Universal, DB-25M Æ DB-25M (4’) Modem Æ Switch Universal Data 4-6, 4-7
M/BM-3 Control Cable, USB Type ‘B’ to USB Type ‘A’ (3’) **
When connecting the Control cable between the CRS-150 and the modems,
ensure that screw locks on the ‘D’ type connectors are securely fastened. This
will prevent the accidental unmating of the cable, particularly when a standby unit
is being removed or replaced.
Interface Cabling Reference
Used for: Ch. 4 Fig.
Modem Æ Switch Control 4-1
Modem Æ Switch Overhead 4-12
Modem Æ Switch Audio 4-13
4-8, 4-9,
4-10, 4-11
Modem Æ Switch IDR Alarms 4-3
Modem Æ Switch Ext Ref 4-4
Modem Æ Switch IF Interface 4-2
** Although the Auxiliary Serial ports on the CRS-150 and CDM-600 use USB
connectors, the signals are not USB compatible. DO NOT use these cables to
connect any of these ports to the USB po rt of a PC or other compu ting device.
To properly connect a CDM-600 modem pair together with the CRS-150 1:1 Redundancy Switch,
it is essential to ensure that all cable conn ections, particularly the control and IF (both Rx and Tx)
connections, are made correctly:
For Refer to:
Modem Æ Switch Control Connections Sect. 4.2.2
Modem Æ Switch IF Connecti ons Sect. 4.2.3
Modem Æ Switch Utility Co nnec t ion s Sect. 4.2.4
Modem Æ Switch Data Interface Connections Sect. 4.2.5
4.2.1.1 CRS-150 Accessories
Additional accessory equipment that may be ordered includes:
• CIC-20 (CEFD P/N PL/9459-1) HSSI to LVDS Interface Converter
• CIC-35 (CEFD P/N PL/10335-1) ASI to LVDS Interface Converter
• CEFD P/N PS/AC18W01P01 Auxiliary Power Supply for use with CIC-20 or CIC-35
• CEFD P/N CA-0000268 DB-15F to RJ-48 Adapter (for Balanced G.703 E1/T1)
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4.2.2 Modem-to-Switch Control Interface Connection
QTY Part No. Description
2 CA/USB-AM/BM-3 Auxiliary Serial Cable, USB Type ‘B’ to USB Type ‘A’ (3’)
Although these ports use USB connectors, the signals are not USB
compatible. DO NOT use these cables to connect any of these ports to
the USB port of a PC or other computing device.
Figure 4-1. Modem-to-Switch Control Connection
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4.2.3 Modem-to-Switch IF Interface Connection
EXAMPLE:
similarly, the Tx IF from ‘Modem B’ connects to the ‘Tx IF B’ port on the CRS-150.
The same logic applies for the Rx IF connections. It is important to note that failure to
observe this requirement will result in system malfunction.
The Tx IF from ‘ Modem A’ connects to the ‘Tx IF A’ port on the CRS-150;
QTY Part No. Description
4 PL/0946-1 RoHS-Compliant Cable – IF (Tx/Rx), 50Ω Type ‘BNC’ (4’)
Figure 4-2. Modem-to-Switch IF Connection
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4.2.4 Modem-to-User Utility Interface Connection and Examples
4.2.4.1 IDR Alarms Data Interface Example
QTY Part No. Description
CA/WR9564-4 Data Cable, DB-15M Æ DB-15M (4’)
2
Figure 4-3. IDR Alarms Interface Example
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4.2.4.2 External Reference Data Interface Example
QTY Part No. Description
PL/0813-4 Coax Cable, 75Ω Type ‘BNC’ (4’)
2
Figure 4-4. Ext Ref (External Reference) Interface Example
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4.2.5 Modem-to-User Data Interface Connection and Examples
Aside from control, IF, and utility switch-to-modem cabling shown previously, there are a
number of data interface configurations available with the CDM-600. The block diagram shown
in Figure 4-5 is typical for
the examples shown in Sects. 4.2.5.1 through 4.2.5.9.
Figure 4-5. CDM-600 Block Diagram: User Æ Modem Æ Switch Æ Traffic
Note: Unless otherwise specified, the interface cables and components identified in each of the
following examples are individually availabl e for purchase (See Sect. 4.2). Fo r each user interface,
one cable/component set per 1:1 modem pair is required (see examples for specified quantities).
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4.2.5.1 RS-422/232 Interface Example
QTY Part No. Description
PL/6233 Data/Control Cable, Universal, DB-25M Æ DB-25M (4’)
2
Figure 4-6. RS-422/232 Interface Example
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4.2.5.2 HSSI Data Interface Example
Figure 4-7 shows the cabling example of a CDM-600 HSSI 1:1 modem configuration using the
optional CIC-20 HSSI/LVDS Interface Converter. This module converts the DB-25F Data Interface
connector on the front panel of the CRS-150 into a HD-50F connector used for the HSSI data
interface. The module’s DB-25F connector interface facilitates data pass-through for the DB-25M
Overhead data user connection.
QTY Part No. Description
PL/6233 Data/Control Cable, Universal, DB-25M Æ DB-25M (4’)
2
1 PL/9459-1 CIC-20 HSSI to LVDS Interface Converter
2 PS/AC18W01P01 Auxiliary Power Supply for CIC-20
Figure 4-7. HSSI Example
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4.2.5.3 G.703 Balanced Interface Example
QTY Part No. Description
2 CA/WR9563-4 Data Cable, DB-15M Æ DB-15M (4’)
Figure 4-8. G.703 Balanced Interface Example
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4.2.5.4 G.703 Unbalanced Interface Example
QTY Part No. Description
2 CA/WR9563-4 Data Cable, DB-15M Æ DB-15M (4’)
Figure 4-9. G.703 Unbalanced Interface Example
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4.2.5.5 ASI Data Interface Example
Figure 4-10 shows the cabling example of a CDM-600 HSSI 1:1 modem configuration using the
optional CIC-35 DVB-ASI/LVDS Interface Converter. This module converts the DB-25F Data
Interface connector on the CRS-150 front panel into the BNC connector pair used for the ASI data
interface. The module’s DB-25F connector interface facilitates data pass-through for the DB-25M
Overhead data user connection.
QTY Part No. Description
2 CA/WR9563-4 Data Cable, DB-15M Æ DB-15M (4’)
1 PL/10335-1 CIC-35 ASI to LVDS Interface Converter
1 PS/AC18W01P01 Auxiliary Power Supply for CIC-35
Figure 4-10. ASI Example
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4.2.5.6 E1/T1 Data Interface Example
For E1/T1 operation via an RJ-48 user interface, the optional CN-0000268 Adapter, shown in
Figure 4-11, may
connector on the front panel of the CRS-150 to an RJ-48 female connection.
QTY Part No. Description
2 CA/WR9563-4 Data Cable, DB-15M Æ DB-15M (4’)
1 CA-0000268 Adapter, DB-15M Æ RJ-48F
be purchased from Comtech EF Data to adapt the DB-15F Balanced G.703
Figure 4-11. G.703 E1/T1 Interface Example
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4.2.5.7 Overhead Data Interface Example
QTY Part No. Description
2 CA/WR9040-4 Data Cable, DB-25M Æ DB-25M (4’)
Figure 4-12. Overhead Interface Example
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4.2.5.8 Audio Data Interface Example
QTY Part No. Description
2 CA/WR9378-4
Figure 4-13. Audio Interface Example
Data Cable, DB-9M Æ DB-9M (4’)
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4.3 Cabling to the CDM-600L (CLM-9600L)
The block diagram shown in Figure 4-14 depicts connection of a pair of CDM-600L (CLM-9600L)
modems together with the CRS-150 and CRS-170A switches.
Figure 4-14. CDM-600L (CLM-9600L) Block Diagram: Cable Connections
The following table lists cable assemblies that may be supplied with the CRS-170A when used
with the CDM-600L (CLM-9600L) and CRS-150. Other cables between the CRS-150 and the
CDM-600L (CLM-9600L) modems are supplied with the CRS-150.
QTY Part No. Description
2 CA/WR10456-4 Cable – 1:1 Y-Splitter, Data/Control, DB-25M Æ DB-25M, 4’ / DB-9M, 1’
4 CA/RF10453-4 RoHS-Compliant Cable – IF (Tx/Rx), 50Ω Type ‘N’, 4’
When connecting the Control cable between the CRS-150 and the modems,
ensure that screw locks on the ‘D’ type connectors are securely fastened. This
will prevent the accidental un-mating of the cable, particularly when a standby
unit is being removed or replaced.
4–16
Chapter 5. MODEM AND SWITCH
5.1 Overview
CONFIGURATION
In order to avoid damage to the modems and CRS-150 switch, it is important for the
user to follow this sequence of configuration:
• First, connect cables between the (powered OFF) modems and switch as
outlined previously in Chapter 4. CABLES AND CONNECTIONS.
• Second, configure the modems for 1:1 redundant operation, as outlined in this
chapter in Sect. 5.2.
• Third, once the modems have been properly configured for 1:1 redundant
operations, the user should then set the DIP switches on the CRS-150 to the
correct modem selection, as outlined in this chapter in Sect. 5.3 CRS-150
Switch DIP Settings.
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5.2 Configuration of CDM-600s for 1:1 Redundancy
For correct operation of the CRS-150, the CDM-600 modems must have the
following installed:
• Firmware Version 1.1.0 (or higher)
• Hardware Revision 3
If the modem does not meet this requirement, contact Comtech EF Data. Flash
firmware upgrades are free and may be downloaded from the CEFD Web page.
Hardware revision upgrades must be performed at CEFD.
The User can fully configure, monitor, and control the operation of the CDM-600 from the
modem front panel (Figure 5-1) using the key
pad and display, where nested menus displaying all
available options are used and prompt the User to carry out a required action.
Figure 5-1. CDM-600 Front Panel
For detailed information on using the CDM-600 front panel features, refer to the CDM-600/600L
Satellite Modem Installation and Operation Manual.
There are two modes of redundant operation: automatic and manual.
5.2.1 Automatic Redundant Operation
The procedure to configure each CDM-600 modem for automatic 1:1 redundancy is as follows:
1. As noted previously, ensure that all cables – i.e., control, IF, utility, and data – have been
properly connected between the modems and the CRS-150 as directed in Chapter 4.
CABLES AND CONNECTIONS.
2. The CDM-600 needs no unique or special settings for operation in a 1:1 redundancy
configuration. However, before proceeding, check that the Auxiliary Serial link between
the two units is functioning correctly:
From the online unit’s front panel, (Select:) INFO Æ MISC,
then press [ENT]. The bottom line of the display should indicate that the 1:1 link is
keys
active:
MISCELLANEOUS: NORMAL
1:1 SWITCH = NOT CONNECTED ONLINE
This screen shows the following:
using the [Å][Æ] arrow
• Top line: Operational Mode (TEST MODE or NORMAL)
• Bottom line: 1:1 Link Status (CONNECTED or NOT CONNECTED), and
Redundancy Status (OFFLINE or ONLINE).
If the unit is not in 1:1 mode, then recheck that the Auxiliary Serial cables have
been correctly installed before proceeding.
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Modem and Switch Configuration MN/CRS150.IOM
3. Once it has been determined that the 1:1 system is operational, the user should set
up the conditions, via the “Switch Mode” DIP switches on the front panel of the
CRS-150, by which the CRS-150 will initiate an automatic switchover. See Sect.
5.3 for details.
The system, now configured, is ready to be put into service.
5.2.2 Manual Redundant Operat ion (Forced Switchover)
There are two ways to force manual switchover in a 1:1 system:
1. Switchover via the Front Panel (from the (Select:) UTILITY menu).
2. Switchover via the Remote Bus (ASCII String).
5.2.2.1 Forced Switchover via the CDM-600 Front Panel
Using the CDM-600 front panel keypad, (Select:) UTILITY Æ 1:1-MANUAL-SWITCH,
using the [Å][Æ] arrow keys, then press [ENT]:
PRESS ENTER TO FORCE THIS
UNIT TO STANDBY (1:1 ONLY)
If the unit is part of a 1:1 redundant pair of modems, and this unit is currently Online,
pressing [ENT] will cause the unit to switch to Standby.
Note: This only works from the front panel of the Online unit. If this is carried out from
the front panel of the Standby unit, it will not cause a switchover.
5.2.2.2 Forced Switchover via Remote Bus
Forced Switchover via Remote Bus can be accomplished with the user’s own software, or
with Comtech EF Data’s Monitor and Control Software package (SatMac).
Send ASCII string <XXXX/FSW=<CR> (where XXXX is the address of the online unit)
to the online unit to force a switchover.
5.2.3 Replacement of Standby Unit
If it becomes necessary to remove a Standby unit from the redundancy system,
turn the power off before attempting to disconnect any of the cables.
Similarly, when replacing a Standby unit, fully reconnect all cables before
applying power.
REMEMBER
unit is ‘Modem B’.
: In a typical 1:1 modem stack, the top unit is ‘Modem A’; the bottom
5–3
CRS-150 1:1 Redundancy Switch Revision 1
Modem and Switch Configuration MN/CRS150.IOM
5.3 CRS-150 Switch DIP Settings
Two configuration switches are provided on the front panel of the CRS-150 L-Band 1:1
Redundancy Switch (see Figure 5-2)
that initiate an automatic switchover.
Figure 5-2. CRS-150 Front Panel – DIP Switches
. These ‘Switch Mode’ DI P switches control the conditions
“Switch Mode” DIP Switches
Table 5-1 ill
ustrates the settings for the ‘Switch Mode’ DIP switch settings that determine
switchover functionality for a given redundancy configuration.
Table 5-1. CRS-150 DIP Switch Settings
‘Switch Mode’ DIP Settings
DIP Left Switch Right Switch Result
Down (Off) Down Switchover upon a Unit fault only
Up Down Sw itchover upon a Unit or Tx Traffic fault
Down Up Switchover upon a Unit or Rx Traffic fault
Up Up Switchover upon a Unit or Tx Traffic or Rx Traffic fault
RECOMMENDATION:
Comtech EF Data recommends that for most applications, the CRS-150 should be
configured for Switchover upon a Unit fault only
.
Once switchover functionality has been assigned, the modems in redundancy handle faults and
alarms based on the combination of the ‘Switch Mode’ DIP settings, and how fa ults and alarms are
handled by the modems,as configured using the (Select:) INFORMATION: ALARM-MASK
menu via the CDM-600 front panel:
ALARMS MASKED: TX-AIS RX-AIS BUF-SLIP
AGC EBNO SAT TERR
This modem screen shows only any alarm(s) designated as currently masked; if an alarm is not
masked, the relevant screen position of that feature is replaced with a blank space. For detailed
information on possible fault conditions and alarm masking in general, see Chapter 5. FRONT
PANEL OPERATION in the CDM-600/600L Satellite Modem Installation and Operation
Manual.
5–4
A.1 Introduction
A
This appendix contains drawings of cables used with the CRS-150 1:1 Redundancy Switch. These cables are broken in to two categories:
Control Interface Cables and IF / Utility / Data Int erface Cables. Each section provides illustrations of the cables’ technical specifications;
additionally, the table in each section cross-reference to the illustrations found in
A.2 Control Interface Cables
Appendix A. CABLE DRAWINGS
Chapter 4. CABLES AND CONNECTIONS.
App. A
FIG
-1 4-1 CA/USB-AM/BM-3
A-2 4-14 CA/WR10456-4
REF Ch. 4
FIG
CEFD CABLE P/N DESCRIPTION
Modem Æ Switch
USED FOR (TYPE)
USB Type ‘B’ Male Æ USB Type ‘A’ Male, 3’ 1:1 Auxiliary Serial Control
Control/Data Cable, Y-Splitter
DB-25M Æ DB-25M (4’), DB-9M (1’)
A-1
CDM-600L (CDM-9600L) ÆCRS-150 Æ CRS-170A
1:1 Data/Control
CRS-150 1:1 Redundancy Switch Revision 2
Cable Drawings MN/CRS150.IOM
A.2.1 Modem-to-Switch Auxiliary Serial Cable (1:1 Control), USB Type A Æ USB Type B
To CRS-150
Aux Serial A/B
To CDM-600
P6 Aux Serial
Aux Serial A/B (USB Type ‘A’) Æ CDM-600 P6 (USB Type ‘B’) Cable
Pin # Description Direction
1 Ground -2 RS-232 TX Data Out
3 RS-232 RX Data In
4 Ground --
Figure A-1. Auxiliary Serial Control Cable (CEFD P/N CA/USB-AM/BM-3)
A-2
CRS-150 1:1 Redundancy Switch Revision 2
Cable Drawings MN/CRS150.IOM
A.2.2 Modem-to-Switch (CRS-150 Æ CRS-170A) Control/Data ‘Y’ Cable, DB-25M Æ DB-25M, DB-9M
(CDM-600L [CDM-9600L])
Figure A-2. Data / Control ‘Y’ Cable (CEFD P/N CA/WR10456-4)
A-3
CRS-150 1:1 Redundancy Switch Revision 2
Cable Drawings MN/CRS150.IOM
A.3 IF / Utility / Data Interface Cables
App. A
FIG
A-3 4-3 PL/0946-1 IF Coax Cable, Type ‘BNC’ 50Ω, 4’
A-4 4-4 CA/WR9564-4 Cable – DB-15M Æ DB-15M, 4’
A-5 4-5 PL/0813-4 IF Coax Cable, Type ‘BNC’ 75Ω, 4’
A-6 4-6 PL/6233 Universal Control/Data Cable, DB-25M Æ DB-25M, 4’
A-7
A-8 4-11 CA/WR9040-4 Cable, DB-25M Æ DB-25M, 4’
A-9 4-12 CA/WR9378-4 Cable, DB-9M Æ DB-9M, 4’
REF Ch. 4
FIG
4-7
4-8
4-9
4-10
CEFD CABLE P/N DESCRIPTION
CA/WR9563-4 Cable, DB-15M Æ DB-15M, 4’
Modem Æ Switch
USED FOR (TYPE)
IF Interface
IDR Alarms Utility Interface
External Reference Utility Interface
EIA-422/232 Data Interface
HSSI Data Interfaces
G.703 Balanced Data Interface
G.703 Unbalanced Data Interface
ASI Data Interface
G.703 E1/T1 Balanced Data Interface
Overhead Data Interface
Audio Interface
A-4
CRS-150 1:1 Redundancy Switch Revision 2
Cable Drawings MN/CRS150.IOM
A.3.1 Modem-to-Switch/User IF (70/140 MHz) Coax Cable, Type ‘BNC’ 50Ω
Figure A-3. Tx/Rx/User Data Type ‘BNC’ 50Ω Coax Cable (CEFD P/N PL/0946-1)
A-5
CRS-150 1:1 Redundancy Switch Revision 2
Cable Drawings MN/CRS150.IOM
A.3.2 Modem-to-Switch Data Cable, DB-15M Æ DB-15M
Figure A-4. IDR Alarms Interface Cable (CEFD P/N CA/WR9564-4)
A-6
CRS-150 1:1 Redundancy Switch Revision 2
Cable Drawings MN/CRS150.IOM
A.3.3 Modem-to-Switch Coax Cable, Type ‘BNC’ 75Ω
Figure A-5. External Reference Type ‘BNC’ 75Ω Coax Cable (CEFD P/N PL/0813-4)
A-7
CRS-150 1:1 Redundancy Switch Revision 2
Cable Drawings MN/CRS150.IOM
A.3.4 Modem-to-Switch Universal Control/Data Cable, DB-25M Æ DB-25M
Figure A-6. 1:1 Universal Control/Data Cable (CEFD P/N PL/6233)
A-8
CRS-150 1:1 Redundancy Switch Revision 2
Cable Drawings MN/CRS150.IOM
A.3.5 Modem-to-Switch Universal Control/Data Cable, DB-15M Æ DB-15M
Figure A-7. 1:1 Universal Control/Data Cable (CEFD P/N CA/WR9563-4)
A-9
CRS-150 1:1 Redundancy Switch Revision 2
Cable Drawings MN/CRS150.IOM
A.3.6 Modem-to-Switch Data Cable, DB-25M Æ DB-25M
Figure A-8. Overhead Data Cable (CEFD P/N CA/WR9040-4)
A-10
CRS-150 1:1 Redundancy Switch Revision 2
Cable Drawings MN/CRS150.IOM
A.3.7 Modem-to-Switch Data Cable, DB-9M Æ DB-9M
Figure A-9. Audio Data Interface Cable (CEFD P/N CA/WR9378-4)
A-11
CRS-150 1:1 Redundancy Switch Revision 2
Cable Drawings MN/CRS150.IOM
Notes:
A-12
METRIC CONVERSIONS
Units of Length
Unit Centimeter Inch Foot Yard Mile Meter Kilometer Millimeter
1 centimeter — 0.3937 0.03281 0.01094
1 inch 2.540 — 0.08333 0.2778
1 foot 30.480 12.0 — 0.3333
1 yard 91.44 36.0 3.0 —
1 meter 100.0 39.37 3.281 1.094
1 mile
1 mm — 0.03937 — — — — — —
1 kilometer — — — — 0.621 — — —
1.609 x 10
5
6.336 x 104 5.280 x 103 1.760 x 103
6.214 x 10
1.578 x 10
1.893 x 10
5.679 x 10
6.214 x 10
-6
-5
-4
-4
-4
—
0.01 — —
0.254 — 25.4
0.3048 — —
0.9144 — —
— — —
1.609 x 103
1.609 —
Temperature Conversions
Temperature
Water freezes 32 0
Water boils 212 100
° Fahrenheit ° Centigrade
Formulas
° C = (F - 32) * 0.555
° F = (C * 1.8) + 32
Absolute 0 -459.69 -273.16
Units of Weight
Unit Gram
Ounce
Avoirdupois
Ounce
Troy
Pound
Avoirdupois
Pound
Troy
Kilogram
1 gram — 0.03527 0.03215 0.002205 0.002679 0.001
1 oz. avoir. 28.35 — 0.9115 0.0625 0.07595 0.02835
1 oz. troy 31.10 1.097 — 0.06857 0.08333 0.03110
1 lb. avoir. 453.6 16.0 14.58 — 1.215 0.4536
1 lb. Troy 373.2 13.17 12.0 0.8229 — 0.3732
1 kilogram
1.0 x 10
3
35.27 32.15 2.205 2.679 —
2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA
480 • 333 • 2200 PHONE
480
• 333 • 2161 FAX
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