Comtech EF Data CRS-170A User manual

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/CRS170A.IOM Revision 10
CRS-
170A
L-Band 1:1 Redundancy Switch
Installation and Operation Manual
Accessory Product for use only with Comtech EF Data
CDM-625/A, CDM-840, CDM-750, CDM-760, CDM-570L, CDM-700, CDM-710,
CDM-710G, CDM-600L (CLM-9600L), and SDM-300L3 Modems
(Modem Firmware and Hardware Requirements Apply)

Copyright © 2013 Comtech EF Data. All rights reserved. Printed in the USA.
Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: [phone]
CRS-
170A
L-Band 1:1 Redundancy Switch
Installation and Operation Manual
Accessory Product for use only with Comtech EF Data
CDM-625/A, CDM-840, CDM-750, CDM-760, CDM-570L, CDM-700, CDM-710,
CDM-710G, CDM-600L (CLM-9600L), and SDM-300L3 Modems
(Modem Firmware and Hardware Requirements Apply)
Part Number MN/CRS170A.IOM
Revision 10

BLANK PAGE

iii
TABLE OF CONTENTS
TABLE OF CONTENTS........................................................................................................................ III
TABLES ........................................................................................................................................... VII
FIGURES.......................................................................................................................................... VII
PREFACE .......................................................................................................................................... XI
About this Manual ............................................................................................................................xi
Related Documents...........................................................................................................................xi
Conventions and References ............................................................................................................xii
Patents and Trademarks......................................................................................................................... xii
Warnings, Cautions and Notes ............................................................................................................... xii
Examples of Multi-Hazard Notices ......................................................................................................... xii
Recommended Standard Designations ................................................................................................. xiii
Safety and Compliance....................................................................................................................xiii
Electrical Safety and Compliance........................................................................................................... xiii
Operating Environment ......................................................................................................................... xiii
Equipment Connection.......................................................................................................................... xiv
European Union Radio Equipment and Telecommunications Terminal Equipment (R&TTE) Directive
(1999/5/EC) and EN 301 489-1.............................................................................................................. xiv
European Union Electromagnetic Compatibility (EMC) Directive (2004/108/EC)............................ xiv
European Union Low Voltage Directive (LVD) (2006/95/EC) ............................................................. xv
European Union RoHS Directive (2002/95/EC) .................................................................................. xv
European Union Telecommunications Terminal Equipment Directive (91/263/EEC) ....................... xv
CE Mark .............................................................................................................................................. xv
Product Support...............................................................................................................................xv
Comtech EF Data Headquarters ....................................................................................................... xvi
Warranty Policy ..............................................................................................................................xvi
Limitations of Warranty......................................................................................................................... xvi
Exclusive Remedies................................................................................................................................xvii
CHAPTER 1. INTRODUCTION .................................................................................................1–1
1.1 Overview...........................................................................................................................1–1
1.1.1 Modem Side Connectors .........................................................................................................1–3

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1.1.2 Antenna Side Connectors ........................................................................................................1–4
1.2 Functional Description .......................................................................................................1–4
1.2.1 Operation with CDM-625/A, -840, -750, -760, -570L, -700, -710, -710G Modems.................1–5
1.2.1.1 1:1 IP Redundancy Data Switching – Functional Description .........................................1–7
1.2.1.1.1 CDM-570L (with Optional IP Module) – Managed Switch or Router Modes ...........1–7
1.2.1.1.2 CDM-625/A, -750, -760, -700, -710, -710G Managed Switch Mode ........................1–9
1.2.1.1.3 CDM-625/A (with Optional IP Packet Processor) – Router Mode..........................1–12
1.2.2 Operation with CDM-600L (CLM-9600L) and SDM-300L3.....................................................1–14
1.2.3 Operation with CDM-600L (CLM-9600L) and CRS-150..........................................................1–14
1.2.4 Operation with SDM-300L3 and SMS-301.............................................................................1–16
1.3 Summary of Specifications ...............................................................................................1–17
CHAPTER 2. INSTALLATION ...................................................................................................2–1
2.1 Unpacking and Inspection ..................................................................................................2–1
2.2 Mounting...........................................................................................................................2–2
CHAPTER 3. MODEM AND SWITCH CONFIGURATION.............................................................3–1
3.1 Overview...........................................................................................................................3–1
3.2 Configuring CDM-625/As for 1:1 Redundancy .....................................................................3–3
3.2.1 User Remote Ethernet M&C Interface ....................................................................................3–3
3.2.2 Carrier-in-Carrier® Redundancy Configuration .......................................................................3–4
3.3 CDM-840 Operation in 1:1 Redundancy ..............................................................................3–5
3.4 CDM-750 or CDM-760 Operation in 1:1 Redundancy ...........................................................3–7
3.5 Configuring CDM-570Ls for 1:1 Redundancy........................................................................3–9
3.5.1 IP Redundancy Configuration ................................................................................................3–10
3.5.2 Non-IP Redundancy Configuration........................................................................................3–11
3.6 Configuring CDM-700s/CDM-710s/CDM-710Gs for 1:1 Redundancy ..................................3–13
3.6.1 IP Redundancy Configuration................................................................................................3–14
3.6.2 Non-IP Redundancy Configuration........................................................................................3–14
3.7 CDM-600L (CLM-9600L) Operation in 1:1 Redundancy.......................................................3–15
3.8 SDM-300L3 Operation in 1:1 Redundancy.........................................................................3–15
3.9 CRS-170A Switch DIP Settings...........................................................................................3–17

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CHAPTER 4. CABLES AND CONNECTIONS ...............................................................................4–1
4.1 Overview...........................................................................................................................4–1
4.2 Cabling to the CDM-625/A..................................................................................................4–3
4.2.1.1 CRS-170A CDM-625/A Control and IF Interface Cabling Kit KT-0000160 ..................4–3
4.2.2 Modem-to-Switch Control Interface Connection....................................................................4–4
4.2.3 Modem-to-Switch IF Interface Connection .............................................................................4–5
4.2.3.1 Modem-to-Switch L-Band (Rx/Tx) IF Interface Connection............................................4–5
4.2.3.2 Modem-to-Switch L-Band Tx / 70/140 MHz Rx IF Interface Connection...............................4–6
4.2.4 Modem-to-User Data Interface Connections and Examples...................................................4–7
4.2.4.1 EIA-422/232, V.35 Interface Example.............................................................................4–8
4.2.4.2 HSSI Interface Example ...................................................................................................4–8
4.2.4.3 ASI Interface Example .....................................................................................................4–9
4.2.4.4 Quad E1 Interface Example...........................................................................................4–10
4.2.4.5 G.703 Balanced Interface Example...............................................................................4–11
4.2.4.6 G.703 Unbalanced Interface Example ..........................................................................4–11
4.2.4.7 Overhead Interface Example ........................................................................................4–12
4.2.4.8 Engineering Service Channel (ESC) Interface Example .................................................4–12
4.2.4.9 10/100 Ethernet Interface Examples............................................................................4–13
4.2.4.9.1 Managed Switch Mode (with/without IP Packet Processor)..................................4–13
4.2.4.9.2 Router Mode (Optional IP Packet Processor Required) .........................................4–14
4.2.4.9.3 Data Interface Connections using IP Sub-Mux .......................................................4–15
4.2.4.10 PMSI Interface Example............................................................................................4–15
4.3 Cabling to the CDM-840 ...................................................................................................4–17
4.3.1 CRS-170A CDM-840 Control and IF Interface Cabling Kit KT-0000160 ......................................4–17
4.3.2 Unit-to-Switch Control Interface Connection........................................................................4–18
4.3.3 Unit-to-Switch IF Interface Connection.................................................................................4–19
4.3.4 Unit-to-User Data Interface Connections and Examples.......................................................4–20
4.3.4.1 RJ-45 Gigabit Ethernet Data Interface Example ...........................................................4–20
4.3.4.2 KT/12542 G.703 75Ω Data Interface Kit (for G.703 Unbalanced E1)...........................4–21
4.4 Cabling to the CDM-750 or CDM-760 ................................................................................4–23
4.4.1 Modem-to-Switch Control and IF Interface Connection .......................................................4–23
4.4.2 Modem-to-User Data Interface Connections and Examples.................................................4–25
4.4.2.1 RJ-45 Gigabit Ethernet Data Interface Example ...........................................................4–25
4.4.2.2 Optical Gigabit Ethernet Interface Option Example .....................................................4–26
4.4.2.3 Serial Data Interface Kit and Connection Examples......................................................4–27
4.4.2.3.1 KT/12542 G.703 75Ω Data Interface Kit (for Single G.703 E3/T3 PIIC)...................4–28
4.5 Cabling to the CDM-570L..................................................................................................4–29
4.5.1 CRS-170A CDM-570 1:1 Redundancy Kit KT/10860-1 ......................................................4–29
4.5.2 Modem-to-Switch Control Interface Connection..................................................................4–30
4.5.3 Modem-to-Switch IF Interface Connection ...........................................................................4–31
4.5.4 Modem-to-User Data Interface Connections and Examples.................................................4–32
4.5.4.1 EIA-422/232 Interface Example ....................................................................................4–33
4.5.4.2 G.703 Balanced Interface Example...............................................................................4–33

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4.5.4.3 G.703 Unbalanced Interface Example ..........................................................................4–34
4.5.4.4 10/100 Ethernet Interface Example..............................................................................4–35
4.6 Cabling to the CDM-700 ...................................................................................................4–37
4.6.1 Modem-to-Switch Control and IF Interface Connection .......................................................4–37
4.6.2 Modem-to-User Data Interface Kit and Connection Examples .............................................4–39
4.6.2.1 Dual G.703 E3/T3/STS-1 75ΩData Interface (CDI-10) Kit KT/12582 and HSSI Data
Interface (CDI-60) Kit KT/12586....................................................................................4–40
4.6.2.2 155MB Copper Data Interface (CDI-50) Kit KT/12583 ..................................................4–41
4.6.2.3 OC-3 Data Interface (CDI-50) Kits KT/12585 (Single-Mode) or KT/12584 (Multi-Mode) .....
......................................................................................................................................4–42
4.6.2.4 Gigabit Ethernet Data Interface (CDI-70) Example.......................................................4–43
4.7 Cabling to the CDM-710 ...................................................................................................4–45
4.7.1 Modem-to-Switch Control and IF Interface Connection .......................................................4–45
4.7.2 Modem-to-User Data Interface Kit and Connection Examples .............................................4–47
4.7.2.1 ASI 75Ω Data Interface (CDI-40) Kit KT/12579..............................................................4–48
4.7.2.2 HSSI Data Interface (CDI-60) Interface Kit KT/12586....................................................4–49
4.7.2.3 Gigabit Ethernet Data Interface (CDI-70) Example.......................................................4–50
4.8 Cabling to the CDM-710G .................................................................................................4–51
4.8.1 Modem-to-Switch Control and IF Interface Connection .......................................................4–51
4.8.2 Modem-to-User Data Interface Kit and Connection Examples .............................................4–53
4.8.2.1 Single G.703 E3/T3/STS-1 75ΩData Interface (CDI-10-1) Kit KT/12583 ...........................4–54
4.8.2.2 HSSI Data Interface (CDI-60) Kit KT/12586 ...................................................................4–55
4.8.2.3 Gigabit Ethernet Interface (CDI-70) Example ...............................................................4–56
4.9 Cabling the CDM-600L (CLM-9600L)..................................................................................4–57
4.10 Cabling the SDM-300L3 ....................................................................................................4–58
CHAPTER 5. CONNECTOR PINOUTS........................................................................................5–1
5.1 Overview...........................................................................................................................5–1
5.2 Modem Side: Type ‘N’ IF Connectors ..................................................................................5–2
5.3 J3 Control Connector – Modem ‘A’ (Top), DB-9F..................................................................5–3
5.4 J4 Control Connector – Modem ‘B’ (Bottom), DB-9F ............................................................5–4
5.5 Antenna Side: Type ‘N’ IF Connectors .................................................................................5–5
APPENDIX A. CABLE DRAWINGS............................................................................................. A-1
A.1 Introduction ...................................................................................................................... A-1
A.2 Control Interface Cables..................................................................................................... A-2

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A.2.1 Universal Control Cable, DB-9M DB-9M......................................................................... A-3
A.2.2 Adapter Control Cable, RoHS, DB-9M DB-15F................................................................ A-4
A.2.3 Optional ‘Y’ Splitter Adapter Control Cable, (2X) DB-9M DB-15F .................................. A-5
A.2.4 Optional Control Cable, Non-muting, DB-9M DB-15F.................................................... A-6
A.2.5 Data / Control ‘Y’ Cable, Modem to CRS-170A and CRS-150, DB-25M DB-25M, DB-9MA-7
A.2.6 Control Cable, Modem to CRS-170A and SMS-301, DB-9M DB-15M............................. A-8
A.3 IF / Data Interface Cables ................................................................................................. A-10
A.3.1 Modem to CRS-170A, L-Band Coaxial Cable, RoHS, Type ‘N’ 50Ω.................................... A-12
A.3.2 Modem to CRS-170A or User, 70/140 MHz Coaxial Cable, RoHS, Type ‘BNC’ 75 Ω.......... A-13
A.3.3 Modem to User, Splitter Cable, (2X) DB-25M DB-25F.................................................. A-14
A.3.4 Modem to User, CDM-625/A Data ‘Y’ Splitter Cable, (2X) DB-9M DB-9F .................... A-15
A.3.5 Modem to User, Quad E1 ‘Y’ Splitter Adapter Cable, (2X) DB-15F DB-9M .................. A-16
A.3.6 Modem to User, Quad E1 ‘Y’ Splitter Adapter Cable, (2X) RJ-48F DB-9M ................... A-17
A.3.7 Modem to User, Quad E1 ‘Y’ Splitter Adapter Cable Kit (KT-0000122) ............................ A-18
A.3.8 Modem to User, Overhead User Data ‘Y’ Splitter Cable, (2X) HD-44M HD-44F .......... A-19
A.3.9 Modem to Modem Shielded Multi-drop CnC®Plus, CDM-625/A 1:1 Cable, DB-9M DB-9M
........................................................................................................................................... A-20
A.3.10 Modem to User, Optical Gigabit Ethernet Single-Mode OR Multi-Mode Cable Assemblies,
(2X) Type ‘LC’ (4X) Type ‘LC’ ......................................................................................... A-21
A.3.11 Modem to User, G.703 Balanced User Data ‘Y’ Splitter Cable, (2X) DB-15M DB-15M A-22
A.3.12 Modem to User, HSSI User Data ‘Y’ Splitter Cable, (2X) HD-50M HD-50F ................... A-23
A.3.13 Modem to User, OC-3 Single-Mode OR Multi-Mode Cable Assemblies, Type ‘SC/UPC’ 
(2X) Type ‘SC/UPC’ ............................................................................................................ A-24
TABLES
Table 1-1. CRS-170A Application Summary ..............................................................................................1–2
Table 3-1. CRS-170A DIP Switch Settings................................................................................................3–18
Table 5-1. Modem Side Type ‘N’ Connectors...........................................................................................5–2
Table 5-2. J3 - Modem ‘A’ Control Connector Pin Assignments ............................................................... 5–3
Table 5-3. J4 - Modem ‘B’ Control Connector Pin Assignments ...............................................................5–4
Table 5-4. Antenna Side Type ‘N’ Connectors ..........................................................................................5–5
FIGURES
Figure 1-1. CRS-170A L-Band 1:1 Redundancy Switch.............................................................................. 1–1
Figure 1-2. CRS-170A – Modem Side Connectors..................................................................................... 1–3
Figure 1-3. CRS-170A – Antenna Side Connectors and Ground Lug ......................................................... 1–4
Figure 1-4. CDM-570L 1:1 IP Redundancy Router Mode – ‘A’ Online ......................................................1–8
Figure 1-5. CDM-570L 1:1 IP Redundancy Router Mode – ‘B’ Online (Switchover) .................................1–9
Figure 1-6. CDM-625/A, -750, -760, -700, -710, -710G 1:1 IP Redundancy Managed Switch Mode....
........................................................................................................................................................ 1–10
Figure 1-7. CDM-625/A, -750, -760, -700, -710, -710G 1:1 IP Redundancy Managed Switch Mode –
Switchover...................................................................................................................................... 1–11

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Figure 1-8. CDM-625/A 1:1 IP Redundancy Router Mode – ‘A’ Online ..................................................1–13
Figure 1-9. CDM-625/A 1:1 IP Redundancy Router Mode – ‘B’ Online (Switchover) .............................1–14
Figure 2-1. KT/10254 Mounting Panel Kit (for horizontal or vertical mounting)...................................... 2–2
Figure 3-1. CDM-840 Web Server (HTTP) Interface ‘Utility’ Page............................................................. 3–5
Figure 3-2. CDM-570L Configuration Interfaces .......................................................................................3–9
Figure 3-3. CDM-570L CLI 1:1 Redundancy Configuration screen ..........................................................3–11
Figure 3-4. CRS-170A Antenna Side – DIP Switches................................................................................ 3–17
Figure 4-1. CDM-625/A Modem-to-Switch Control Connections............................................................. 4–4
Figure 4-2. CDM-625/A Modem-to-Switch L-Band IF Connections .......................................................... 4–5
Figure 4-3. CDM-625/A Modem-to-Switch L-Band Tx / 70/140 MHz Rx IF Connections ......................... 4–6
Figure 4-4. CDM-625/A Block Diagram: User Modem Switch Traffic......................................... 4–7
Figure 4-5. CDM-625/A EIA-422/232, V.35 1:1 Example ..........................................................................4–8
Figure 4-6. CDM-625/A HSSI 1:1 Example ................................................................................................ 4–8
Figure 4-7. CDM-625/A ASI 1:1 Example .................................................................................................. 4–9
Figure 4-8. CDM-625/A Quad E1 1:1 Example........................................................................................4–10
Figure 4-9. CDM-625/A G.703 Balanced 1:1 Example ............................................................................ 4–11
Figure 4-10. CDM-625/A G.703 Unbalanced 1:1 Example...................................................................... 4–11
Figure 4-11. CDM-625/A Overhead 1:1 Example.................................................................................... 4–12
Figure 4-12. CDM-625/A ESC 1:1 Example..............................................................................................4–12
Figure 4-13. CDM-625/A 10/100 Ethernet 1:1 Example – Managed Switch Mode................................4–13
Figure 4-14. CDM-625/A 10/100 Ethernet 1:1 Example – Router Mode................................................ 4–14
Figure 4-15. CDM-625/A PMSI 1:1 Example ...........................................................................................4–15
Figure 4-16. CDM-840 Unit-to-Switch Control Connections................................................................... 4–18
Figure 4-17. CDM-840 Unit-to-Switch L-Band IF Connections................................................................ 4–19
Figure 4-18. CDM-840 RJ-45 Gigabit Ethernet 1:1 Example ...................................................................4–20
Figure 4-19. CDM-840 Unbalanced G.703 E3/T375Ω Interface Kit – KT/12542 .....................................4–21
Figure 4-20. CDM-750/CDM-760 Modem-to-Switch Control & IF Connections Kit KT-0000160 ........... 4–24
Figure 4-21. CDM-750/CDM-760 RJ-45 Gigabit Ethernet 1:1 Example ..................................................4–25
Figure 4-22. CDM-750/CDM-760 Optical Gigabit Ethernet 1:1 Example................................................4–26
Figure 4-23. CDM-750/CDM-760 Block Diagram: User Modem Switch Traffic........................ 4–27
Figure 4-24. CDM-750/CDM-760 G.703 E3/T3 PIIC Interface Kit KT/12542........................................... 4–28
Figure 4-25. CDM-570L Modem-to-Switch Control Connections ...........................................................4–30
Figure 4-26. CDM-570L Modem-to-Switch L-Band IF Connections ........................................................ 4–31
Figure 4-27. CDM-570L Block Diagram: User Modem Switch Traffic.......................................4–32
Figure 4-28. CDM-570L EIA-422/232 1:1 Example.................................................................................. 4–33
Figure 4-29. CDM-570L G.703 Balanced 1:1 Example............................................................................. 4–33
Figure 4-30. CDM-570L G.703 Unbalanced 1:1 Example ........................................................................ 4–34
Figure 4-31. CDM-570L 10/100 Ethernet 1:1 Example...........................................................................4–35
Figure 4-32. CDM-700 Modem-to-Switch Control & IF Connections – KT/12551 .................................. 4–38
Figure 4-33. CDM-700 Block Diagram: User Modem Switch Traffic.........................................4–39
Figure 4-34. CDM-700 G.703 E3/T3/STS-1 / HSSI 1:1 Example ................................................................ 4–40
Figure 4-35. CDM-700 155MB Copper 1:1 Example ...............................................................................4–41
Figure 4-36. CDM-700 OC-3 1:1 Example (Single-Mode shown) ............................................................4–42
Figure 4-37. CDM-700 Gigabit Ethernet (GigE) 1:1 Example ..................................................................4–43
Figure 4-38. CDM-710 Modem-to-Switch Control & IF Connections – KT/12551 .................................. 4–46
Figure 4-39. CDM-710 Block Diagram: User Modem Switch Traffic.........................................4–47
Figure 4-40. CDM-710 ASI 1:1 Example ..................................................................................................4–48

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Figure 4-41. CDM-710 HSSI 1:1 Example ................................................................................................4–49
Figure 4-42. CDM-710 Gigabit Ethernet (GigE) 1:1 Example .................................................................. 4–50
Figure 4-43. CDM-710G Modem-to-Switch Control & IF Connections – KT/12551 ...............................4–52
Figure 4-44. CDM-710G Block Diagram: User Modem Switch Traffic ........................................4–53
Figure 4-45. CDM-710G Single G.703 E3/T3/STS-1 1:1 Example.............................................................. 4–54
Figure 4-46. CDM-710G HSSI 1:1 Example.............................................................................................. 4–55
Figure 4-47. CDM-710G Gigabit Ethernet (GigE) 1:1 Example................................................................4–56
Figure 4-48. CDM-600L (CLM-9600L) Block Diagram: Cable Connections.............................................. 4–57
Figure 4-49. SDM-300L3 Block Diagram: Cable Connection ...................................................................4–58
Figure 5-1. CRS-170A – Modem and Antenna Side Connectors ............................................................... 5–1
Figure A-1. Universal Control Cable (CEFD P/N CA/WR9378-4) .............................................................. A-3
Figure A-2. Adapter Control Cable (CEFD P/N CA/WR12135-1) ............................................................... A-4
Figure A-3. Optional ‘Y’ Splitter Adapter Control Cable, (CEFD P/N CA/WR13011-4).............................. A-5
Figure A-4. Optional Control Cable (CEFD P/N CA-0000187).................................................................... A-6
Figure A-5. Data / Control ‘Y’ Cable (CEFD P/N CA/WR10456-4).............................................................. A-7
Figure A-6. Control Cable (CEFD P/N CA/WR10163-1) ............................................................................. A-8
Figure A-7. Tx/Rx 50Ω Type ‘N’ Coaxial Cable (CEFD P/N CA/RF10453-4).............................................. A-12
Figure A-8. Tx/Rx/User Data 75Ω Type ‘BNC’ Coaxial Cable (CEFD P/N CA/BNC75OHM)...................... A-13
Figure A-9. 1:1 User Data Splitter Cable (CEFD P/N CA/RB10461-1) ...................................................... A-14
Figure A-10. 1:1 User Data ‘Y’ Splitter Cable (CEFD P/N CA-0000071) ................................................... A-15
Figure A-11. 1:1 Quad E1 User Data ‘Y’ Splitter Adapter Cable (CEFD P/N CA-0000163)....................... A-16
Figure A-12. Quad E1 User Data ‘Y’ Splitter Adapter Cable (CEFD P/N CA-0000164)............................. A-17
Figure A-13. Quad E1 User Data ‘Y’ Splitter Adapter Cable Kit (CEFD P/N KT-0000122)........................ A-18
Figure A-14. Overhead User Data ‘Y’ Splitter Cable (CEFD P/N CA-0000070) ........................................ A-19
Figure A-15. Modem to Modem Shielded Multi-drop CnC®Plus, CDM-625/A 1:1 Cable (CEFD P/N
CA-0000276)................................................................................................................................... A-20
Figure A-16. Optical Gigabit Ethernet User Data Cable Assembly (See Table for CEFD P/N) ................. A-21
Figure A-17. G.703 Balanced User Data ‘Y’ Splitter Cable (CEFD P/N CA/WR10522-1).......................... A-22
Figure A-18. HSSI User Data ‘Y’ Splitter Cable (CEFD P/N PP/SC3523) ................................................... A-23
Figure A-19. OC-3 User Data Cable Assembly (See Table for CEFD P/N)................................................ A-24

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PREFACE
About this Manual
This manual provides installation and operation information for the Comtech EF Data CRS-170A
L-Band 1:1 Redundancy Switch. This is a technical document intended for the persons responsible
for the operation and maintenance of the CRS-170A and its supported modems.
Related Documents
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•Comtech EF Data CDM-760 Advanced High-Speed Trunking Modem Installation and Operation
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•Comtech EF Data CDM-570/CDM-570L/CDMR-570L Satellite Modem Installation and Operation
Manual (CEFD P/N MN/CDM570L.IOM)
•Comtech EF Data CDM-700 Satellite Modem Installation and Operation Manual
(CEFD P/N MN/CDM700.IOM)
•Comtech EF Data CDM-710 Broadcast Satellite Modem Installation and Operation Manual
(CEFD P/N CDM710.IOM)
•Comtech EF Data CDM-710G Satellite Modem Installation and Operation Manual
(CEFD P/N MN-CDM710G)

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Preface MN/CRS170A.IOM
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•Comtech EF Data CDM-600L Satellite Modem Installation and Operation Manual
(CEFD P/N MN/CDM600L.IOM)
•Comtech EF Data CLM-9600L Open Network Satellite Modem Installation and Operation Manual
(CEFD P/N MN/CLM9600L.IOM)
•Comtech EF Data SDM-300L3 Satellite Modem Installation and Operation Manual
(CEFD P/N MN/SDM300L3.IOM)
Conventions and References
Patents and Trademarks
See all of Comtech EF Data's Patents and Patents Pending at http://patents.comtechefdata.com.
Comtech EF Data acknowledges that all trademarks are the property of the trademark owners.
Warnings, Cautions and Notes
A WARNING informs you about a possible hazard that MAY CAUSE DEATH or
SERIOUS INJURY.
A CAUTION informs you about a possible hazard that MAY CAUSE INJURY or
PROPERTY DAMAGE.
A NOTE gives you important information about a task or the equipment.
A REFERENCE
Examples of Multi-Hazard Notices
directs you to additional information about a task or the
equipment.

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Recommended Standard Designations
The new designation of the Electronic Industries Association (EIA) supersedes the Recommended
Standard (RS) designations. References to the old designations may be shown when depicting
actual text (e.g., RS-232) displayed on front panel menus, Web Server pages, serial remote
interfaces, Telnet Command Line Interfaces (CLIs), or unit rear panels. All other references in the
manual refer to EIA designations.
The user should carefully review the following information.
Safety and Compliance
Electrical Safety and Compliance
The unit complies with the EN 60950 Safety of Information Technology Equipment (Including
Electrical Business Machines) safety standard.
The equipment is rated for operation at ±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 volts DC. The
power supply current is, in all circumstances, supplied by either a single Comtech EF Data
modem, or a pair of these modems.
IF THE UNIT IS OPERATED IN A VEHICLE OR MOVABLE INSTALLATION, MAKE SURE
THE UNIT IS STABLE. OTHERWISE, EN 60950 SAFETY IS NOT GUARANTEED.
Operating Environment
DO NOT OPERATE THE UNIT IN ANY OF THESE EXTREME OPERATING CONDITIONS:
•AMBIENT TEMPERATURES LESS THAN 0° C (32° F) OR MORE THAN 50° C
(122° F).
•PRECIPITATION, CONDENSATION, OR HUMID ATMOSPHERES OF MORE
THAN 95% RELATIVE HUMIDITY.
•UNPRESSURIZED ALTITUDES OF MORE THAN 2000 METRES (6561.7 FEET).
•EXCESSIVE DUST.
•FLAMMABLE GASES.
• CORROSIVE OR EXPLOSIVE ATMOSPHERES.

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Equipment Connection
THE CRS-170A IS DESIGNED FOR OPERATION ONLY WITH THE COMTECH EF DATA
PRODUCTS LISTED IN THIS MANUAL UNDER ‘RELATED DOCUMENTS’
. THESE
PRODUCTS SUPPLY DC OPERATING CURRENT (ELECTRONICA
LLY FUSED AND
PROTECTED) AND CONTROL SIGNALS FOR THE CORRECT FUNCTIONING OF THIS
SWITCH. CONNECTION TO OTHER MANUFACTURERS’ EQUIPMENT COULD RESULT
IN DAMAGE TO THE SWITCH. THE CRS-170A IS NOT COMPATIBLE WITH OTHER
COMTECH EF DATA MODEMS OR PRODUCTS NOT LISTED IN THIS MANUAL.
European Union Radio Equipment and Telecommunications Terminal
Equipment (R&TTE) Directive (1999/5/EC) and EN 301 489-1
Independent testing verifies that the unit complies with the European Union R&TTE Directive, its
reference to EN 301 489-1 (Electromagnetic compatibility and Radio spectrum Matters [ERM];
ElectroMagnetic Compatibility [EMC] standard for radio equipment and services, Part 1:
Common technical requirements), and the Declarations of Conformity for the applicable
directives, standards, and practices that follow:
European Union Electromagnetic Compatibility (EMC) Directive
(2004/108/EC)
•Emissions: EN 55022 Class B – Limits and Methods of Measurement of Radio Interference
Characteristics of Information Technology Equipment.
•Immunity: EN 55024 – Information Technology Equipment: Immunity Characteristics, Limits,
and Methods of Measurement.
•EN 61000-3-2 – Harmonic Currents Emission
•EN 61000-3-3 – Voltage Fluctuations and Flicker.
•Federal Communications Commission Federal Code of Regulation FCC Part 15, Subpart B.
TO ENSURE THAT THE UNIT COMPLIES WITH THESE STANDARDS, OBEY THESE
INSTRUCTIONS:
•Use coaxial cable that is of good quality (e.g., RG58/U (50Ω) or RG59/U (75Ω)) for
connections to the IF Tx and Rx (transmit and receive) BNC female connectors.
•Use Type 'D' connectors that have back-shells with continuous metallic shielding.
Type ‘D’ cabling must have a continuous outer shield (either foil or braid, or both). The
shield must be bonded to the back-shell.

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•Operate asll products with their covers on at all times.
European Union Low Voltage Directive (LVD) (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
Protective Earth
Fuse Chassis Ground
For additional symbols, refer to Warnings, Cautions and Notes listed earlier in this
Preface.
European Union RoHS Directive (2002/95/EC)
This unit satisfies (with exemptions) the requirements specified in the European Union Directive
on the Restriction of Hazardous Substances in Electrical and Electronic Equipment (EU RoHS,
Directive 2002/95/EC).
European Union Telecommunications Terminal Equipment Directive
(91/263/EEC)
In accordance with the European Union Telecommunications Terminal Equipment Directive
91/263/EEC, do not directly connect the unit to the Public Telecommunications Network.
CE Mark
Comtech EF Data declares that the unit meets the necessary requirements for the CE Mark.
Product Support
For all product support, please call:
+1.240.243.1880
+1.866.472.3963 (toll free USA)

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Comtech EF Data Headquarters
http://www.comtechefdata.com
Comtech EF Data Corp.
2114 West 7th Street
Tempe, Arizona USA 85281
+1.480.333.2200
Warranty 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.
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.

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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. 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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Notes: