ViaSat ArcLight User Manual

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TM

ArcLight

Hub User’s Guide

ViaSat

Document Number: 1081006

(Rev. 001)

ArcLightTM Hub

User’s Guide

TM

ArcLight

Hub User’s Guide

ViaSat

Document Number: 1081006

(Rev. 001)

ViaSat, Inc.

Corporate
Headquarters

6155 El Camino Real
Carlsbad, CA 92009-1699
Phone: [phone]
Fax: [phone]

Germantown, MD

20511 Seneca Meadows
Parkway Suite 200

Germantown, MD 20876
Phone: [phone]
Fax: [phone]

Duluth, GA

1725 Breckinridge Plaza
Duluth, GA 30096
Phone: [phone]
Fax: [phone]

www.viasat.com

Publication

Information

Revision Number Date Released Comments

001 30 March, 2009 Initial release for V 3.0

© 2009 ViaSat, Incorporated. All rights reserved.
ViaSat® and the ViaSat logo are registered trademarks of ViaSat, Inc.
ArcLight

ViaSat Proprietary—Information in this document is subject to change without notice.
This document is proprietary to ViaSat, Inc., and shall be protected by a receiving party
in accordance with the terms of its contracts and agreements with Comsat Laboratories
and ViaSat, Inc., covering ArcLight

No part of this document may be reproduced or transmitted in any form or by any means,
electronic or mechanical, for any purpose, without the express written permission of
ViaSat, Inc.

Agilent MXG is a registered trademark of Agilent Technologies; Black Box is a
trademark of Black Box Corp.; Cyclades® and DSR® are registered trademarks of
Avocent Corp.; Catalyst® is a registered trademark of Cisco®; VertexRSI® is a
registered trademark of General Dynamics. All other product names, service marks,
trademarks, and registered trademarks used in this document are the property of their
respective owners.

TM

is a trademark of ViaSat, Inc.

TM

products.

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ArcLight Hub User’s Guide

REGULATORY COMPLIANCE and NOTICES

FCC Notice

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15, of the
FCC Rules. These limits are designed to provide a reasonable protection aga inst harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interfer ence to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required
to correct the interference at his own expense.

Any changes or modifications not expressly approved in writing by the manufacturer could void the user’s authority to
operate the equipment.

CAUTION: Shielded I/O cables must be used and all covers must be in place when operating

this equipment.

Canadian Department of Communications compliance statement:

This equipment does not exceed Class A limits per radio noise emissions for digital apparatus set out in the Radio
Interference Regulation of the Canadian Department of Communications. Operation in a residential area ma y cause
unacceptable interference to radio and TV reception requiring the owner or operator to take whatever steps are necessary to
correct the interference.

Avis de conformite aux normes du ministere des Communications du Canada:

Cet equipment ne dépasse pas les limites de Class A d’émission de bruits radioélectriques pour les appareils numériques
tels que prescrites par le Règlement sur le brouillage radioélectrique etabli par le ministére de Communications du Canada.
L’exploitation faite en milieu résidentiel peut entrainer le brouillage des réc eptions radio et télé, ce qui obligerait le
propriétaire ou l’operateur à prendre les dispositions nécessaires pour e n éliminer les causes.

Electro-Magnetic Emissions Compliance

The equipment has been tested and is in compliance with the following emissions and immunity requirements:

Emissions:

FCC 15B, Sec. 107, Class “A ” Conducted Emissions
FCC 15B, Sec. 109, Class “A” Radiated Emissions
EN 55022 (1998)A1, Class “A” Conducted Emissions
EN 55022 (1998)A1, Class “A” Telecom Conducted Emissions
EN 55022 (1998)A1, Class “A” Radiated Emissions
EN 61000-3-2 (2000) Power Line Harmonics
EN 61000-3-3 (1995) Power Line Flicker

Immunity:

IEC 61000-4-2 (1995),A1(1998),A2(2000) ESD Immunity
IEC 61000-4-3 (2002),A1(2002) Radio Frequen cy Immunity
IEC 61000-4-4 (1995)A1(2000),A2(2001) Electrical Fast Transient Immunity
IEC 61000-4-5 (1995),A1(2001) Surge Immunity
IEC 61000-4-6 (1996)A1(2000) RF Common Mode Immunity
IEC 61000-4-8 (1993)A1(2000) Power Frequency Magnetic Field
IEC 61000-4-11(2001) Voltage Dips and Short Interruptions

Safety Compliance

The equipment has been tested and is in compliance with the following safety requirements:
IEC 60950-1 (ed.1) IECEE CB Scheme

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Table of Contents

1. GENERAL ARCLIGHTTM SYSTEM DESCRIPTION ......................................................................................... 1-1

1.1 INTRODUCTION .....................................................................................................................................................1-1

1.2 HUB SYSTEM........................................................................................................................................................1-5

1.2.1 Hub Components................................................................................................................................1-5

1.2.2 Hub Software......................................................................................................................................1-10

1.2.3 Satellite Air Interface .......................................................................................................................1-12

1.2.4 Return channel access....................................................................................................................1-14

1.2.5 Power control......................................................................................................................................1-15

1.2.6 Congestion control............................................................................................................................1-15

1.2.7 Hardware Subsystems.....................................................................................................................1-16

1.3 ARCLIGHT NETWORK.........................................................................................................................................1-18

1.3.1 Satellite Resource Utilization ........................................................................................................1-18

1.3.2 Network Terminal Population .......................................................................................................1-18

1.4 SYSTEM ADDRESSING .......................................................................................................................................1-19

1.4.1 Satellite Transmission System......................................................................................................1-20

1.4.2 Outlink Requirements ..................................................................................................................... 1-20

1.4.3 Return Link Requirements.............................................................................................................1-21

1.5 CONTROL PROTOCOLS.......................................................................................................................................1-23

1.5.1 Control Messaging ............................................................................................................................1-23

1.5.2 Control Protocols...............................................................................................................................1-23

1.5.3 User Traffic management ............................................................................................................... 1-26

1.5.4 Domain name service ......................................................................................................................1-27

1.5.5 Provisioning ........................................................................................................................................ 1-27

1.5.6 Status monitoring.............................................................................................................................1-27

2. INITIAL NETWORK CONFIGURATION..............................................................................................................2-1

2.1 INTRODUCTION – ARCLIGHT

TM

MANAGEMENT CLIENT ....................................................................................2-1

3. SCREEN DESCRIPTIONS FOR NMS CLIENT.................................................................................................3-1

3.1 LOGIN ....................................................................................................................................................................3-1

3.2 GUI NAVIGATION .................................................................................................................................................3-6

3.2.1 Main Menu Bar....................................................................................................................................3-6

3.2.2 Hub Component Screens..................................................................................................................3-7

3.2.3 Tool Bar Icons ......................................................................................................................................3-8

3.2.4 Control Buttons...................................................................................................................................3-9

3.2.5 Window Arrangement and Size Controls.....................................................................................3-9

3.3 NMS CLIENT SCREEN FIELD DEFINITIONS ....................................................................................................3-11

3.3.1 Session .................................................................................................................................................3-14

3.3.2 VMTs .....................................................................................................................................................3-15

3.3.3 Window.................................................................................................................................................3-54

3.3.4 Help .......................................................................................................................................................3-55

3.3.5 ArcLight NMS Management Tools................................................................................................3-56

3.3.6 Manage Hub ....................................................................................................................................... 3-57

3.3.7 Manage Satellites .............................................................................................................................. 3-75

3.3.8 Manage Transponders.....................................................................................................................3-76

3.3.9 Manage Forward Link Profiles ......................................................................................................3-80

3.3.10 Manage Return Links ......................................................................................................................3-84

3.3.11 Manage Air Channels ......................................................................................................................3-86

3.3.12 Manage Power Control Profiles .....................................................................................................3-89

3.3.13 Manage Component Membership ................................................................................................3-91

3.3.14 MDLS Configuration ........................................................................................................................ 3-92

3.3.15 About This Hub .................................................................................................................................3-94

3.3.16 Managing ArcLight Components..................................................................................................3-96

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4. OTHER NETWORK MANAGEMENT FACILITIES........................................................................................... 4-1

4.1 OPMANAGER ........................................................................................................................................................4-1

4.2 DSVIEW................................................................................................................................................................4-2

4.3 TERMVIEWER.......................................................................................................................................................4-3

4.4 ISITUP ...................................................................................................................................................................4-9

4.5 APR SERVER......................................................................................................................................................4-11

4.5.1 Overview...............................................................................................................................................4-11

4.5.2 Creating APRSERVER Service ......................................................................................................4-11

4.5.3 Starting AprServer Service .............................................................................................................4-12

4.5.4 Removing APRSERVER Service ....................................................................................................4-13

4.5.5 Using APRSERVER...........................................................................................................................4-13

4.6 NETWORK PERFORMANCE TOOLS ....................................................................................................................4-14

4.6.1 FTP Servers.........................................................................................................................................4-14

4.6.2 Other.....................................................................................................................................................4-14

5. HARDWARE COMPONENTS ................................................................................................................................5-1

5.1 INTRODUCTION .....................................................................................................................................................5-1

5.2 ARCLIGHT HUB SUBSYSTEM ..............................................................................................................................5-1

5.2.1 Hub Subsystem Overview ................................................................................................................5-1

5.2.2 Hub Components................................................................................................................................5-2

5.3 ARCLIGHT BLADE SYSTEM .................................................................................................................................5-3

5.3.1 Overview.................................................................................................................................................5-3

5.3.2 Installation..........................................................................................................................................5-14

5.3.3 Configuration .....................................................................................................................................5-14

5.3.4 Operation.............................................................................................................................................5-14

5.3.5 Monitoring...........................................................................................................................................5-14

5.3.6 Troubleshooting.................................................................................................................................5-14

5.4 NETWORK MANAGEMENT SYSTEM (NMS) ......................................................................................................5-15

5.4.1 Overview...............................................................................................................................................5-15

5.4.2 Ethernet Interfaces...........................................................................................................................5-16

5.4.3 Installation Procedures...................................................................................................................5-16

5.4.4 Configuration .....................................................................................................................................5-16

5.4.5 Operation.............................................................................................................................................5-16

5.4.6 Monitoring...........................................................................................................................................5-17

5.4.7 Troubleshooting.................................................................................................................................5-17

5.5 REAL-TIME NETWORK MANAGEMENT SYSTEM (RTNMS).............................................................................5-18

5.5.1 Overview...............................................................................................................................................5-18

5.5.2 Physical Interfaces............................................................................................................................ 5-19

5.5.3 Installation..........................................................................................................................................5-19

5.5.4 Configuration .....................................................................................................................................5-19

5.5.5 Operation.............................................................................................................................................5-19

5.5.6 Monitoring...........................................................................................................................................5-20

5.5.7 Troubleshooting.................................................................................................................................5-20

5.6 MONITOR SERVER .............................................................................................................................................5-21

5.6.1 Overview...............................................................................................................................................5-21

5.6.2 Physical Interfaces............................................................................................................................ 5-22

5.6.3 Installation..........................................................................................................................................5-22

5.6.4 Configuration .....................................................................................................................................5-22

5.6.5 Operation.............................................................................................................................................5-22

5.6.6 Monitoring...........................................................................................................................................5-22

5.6.7 Troubleshooting.................................................................................................................................5-22

5.7 SUPPORT SERVER ..............................................................................................................................................5-23

5.7.1 Overview...............................................................................................................................................5-23

5.7.2 Physical Interfaces............................................................................................................................ 5-23

5.7.3 Installation..........................................................................................................................................5-24

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5.7.4 Configuration .....................................................................................................................................5-24

5.7.5 Operation.............................................................................................................................................5-24

5.7.6 Monitoring...........................................................................................................................................5-24

5.7.7 Troubleshooting.................................................................................................................................5-24

5.8 NETWORK PERFORMANCE TEST SERVER........................................................................................................5-25

5.8.1 Overview...............................................................................................................................................5-25

5.8.2 Installation..........................................................................................................................................5-26

5.8.3 Configuration .....................................................................................................................................5-26

5.8.4 Operation.............................................................................................................................................5-27

5.8.5 Monitoring...........................................................................................................................................5-27

5.8.6 Troubleshooting.................................................................................................................................5-27

5.9 NETWORK ATTACHED SERVER (NAS) .............................................................................................................5-28

5.9.1 Overview...............................................................................................................................................5-28

5.9.2 Installation..........................................................................................................................................5-29

5.9.3 Operation.............................................................................................................................................5-29

5.9.4 Troubleshooting.................................................................................................................................5-29

5.10 MULTI-CHANNEL DEMODULATOR II (MCD II) ...........................................................................................5-30

5.10.1 Overview...............................................................................................................................................5-30

5.10.2 Physical Interfaces............................................................................................................................5-32

5.10.3 Installation ..........................................................................................................................................5-33

5.10.4 Configuration .....................................................................................................................................5-33

5.10.5 Operation.............................................................................................................................................5-34

5.10.6 Monitoring ...........................................................................................................................................5-36

5.10.7 Troubleshooting.................................................................................................................................5-38

5.11 FORWARD LINK MODULATOR (VFLM-70)..................................................................................................5-50

5.11.1 Overview...............................................................................................................................................5-50

5.11.2 Physical Interfaces............................................................................................................................5-52

5.11.3 Installation ..........................................................................................................................................5-54

5.11.4 Configuration .....................................................................................................................................5-55

5.11.5 Operation.............................................................................................................................................5-56

5.11.6 Monitoring ...........................................................................................................................................5-57

5.11.7 Troubleshooting.................................................................................................................................5-57

5.12 VPCMA-70 HUB CANCELLER .....................................................................................................................5-58

5.12.1 Overview...............................................................................................................................................5-58

5.12.2 Physical Interfaces............................................................................................................................5-60

5.12.3 Installation ..........................................................................................................................................5-61

5.12.4 Configuration .....................................................................................................................................5-61

5.12.5 Operation.............................................................................................................................................5-67

5.12.6 Monitoring ...........................................................................................................................................5-68

5.12.7 Troubleshooting.................................................................................................................................5-69

5.13 MONITOR VMBR ...........................................................................................................................................5-70

5.13.1 Overview...............................................................................................................................................5-70

5.13.2 Physical Interfaces............................................................................................................................5-70

5.13.3 Installation ..........................................................................................................................................5-70

5.13.4 Configuration .....................................................................................................................................5-70

5.13.5 Operation.............................................................................................................................................5-70

5.13.6 Monitoring ...........................................................................................................................................5-70

5.13.7 Troubleshooting.................................................................................................................................5-70

5.14 LEADER VMBR..............................................................................................................................................5-71

5.14.1 Overview...............................................................................................................................................5-71

5.14.2 Physical Interfaces............................................................................................................................5-71

5.14.3 Installation ..........................................................................................................................................5-71

5.14.4 Configuration .....................................................................................................................................5-71

5.14.5 Operation.............................................................................................................................................5-71

5.14.6 Montioring ...........................................................................................................................................5-71

5.14.7 Troubleshooting.................................................................................................................................5-71

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5.15 POLICY BASED ROUTER (PBR) ....................................................................................................................5-72

5.15.1 Overview...............................................................................................................................................5-72

5.15.2 Physical Interfaces............................................................................................................................5-73

5.15.3 Installation ..........................................................................................................................................5-73

5.15.4 Configuration .....................................................................................................................................5-73

5.15.5 Operation.............................................................................................................................................5-74

5.15.6 Monitoring ...........................................................................................................................................5-74

5.15.7 Troubleshooting.................................................................................................................................5-74

5.16 COMPACT XPEP TCP/IP ACCELERATOR....................................................................................................5-75

5.16.1 Overview...............................................................................................................................................5-75

5.16.2 Physical Interfaces............................................................................................................................5-76

5.16.3 Installation ..........................................................................................................................................5-79

5.16.4 Configuration .....................................................................................................................................5-79

5.16.5 Operation.............................................................................................................................................5-79

5.16.6 Monitoring ...........................................................................................................................................5-79

5.16.7 Troubleshooting.................................................................................................................................5-79

5.17 ETHERNET SWITCHES/ROUTERS ................................................................................................................5-80

5.17.1 Overview...............................................................................................................................................5-80

5.17.2 Physical Interfaces............................................................................................................................5-81

5.17.3 Installation ..........................................................................................................................................5-81

5.17.4 Configuration .....................................................................................................................................5-81

5.17.5 Operation.............................................................................................................................................5-81

5.17.6 Monitoring ...........................................................................................................................................5-81

5.17.7 Troubleshooting.................................................................................................................................5-81

5.18 ADAPTIVE SECURITY APPLIANCE (ASA) FIREWALL ....................................................................................5-82

5.18.1 Overview...............................................................................................................................................5-82

5.18.2 Installation ..........................................................................................................................................5-83

5.18.3 Operation.............................................................................................................................................5-83

5.18.4 Troubleshooting.................................................................................................................................5-83

5.19 ALLOT NETENFORCER® 404-SERIES TRAFFIC SHAPER SERVER ............................................................5-84

5.19.1 Overview...............................................................................................................................................5-84

5.19.2 Installation ..........................................................................................................................................5-84

5.19.3 Operation.............................................................................................................................................5-85

5.19.4 Troubleshooting.................................................................................................................................5-85

5.20 SERIAL OVER LAN (SOL) SWITCH ...............................................................................................................5-86

5.20.1 Installation ..........................................................................................................................................5-87

5.20.2 Operation.............................................................................................................................................5-87

5.20.3 Troubleshooting.................................................................................................................................5-87

5.21 ARCLIGHT HUB RF INTERFACE UNIT (AHRFIU).......................................................................................5-88

5.21.1 Installation ..........................................................................................................................................5-88

5.21.2 Operation.............................................................................................................................................5-90

5.21.3 Troubleshooting.................................................................................................................................5-90

5.22 KVM SWITCH .................................................................................................................................................5-91

5.22.1 Overview...............................................................................................................................................5-91

5.22.2 Physical Interfaces............................................................................................................................5-91

5.22.3 Installation ..........................................................................................................................................5-91

5.22.4 Configuration .....................................................................................................................................5-91

5.22.5 Operation.............................................................................................................................................5-91

5.22.6 Monitoring ...........................................................................................................................................5-91

5.22.7 Troubleshooting.................................................................................................................................5-91

5.23 KVM SWITCH DISPLAY .................................................................................................................................5-92

5.23.1 Overview...............................................................................................................................................5-92

5.23.2 Physical Interfaces............................................................................................................................5-92

5.23.3 Installation ..........................................................................................................................................5-92

5.23.4 Configuration .....................................................................................................................................5-92

5.23.5 Operation.............................................................................................................................................5-92

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5.23.6 Monitoring ...........................................................................................................................................5-92

5.23.7 Troubleshooting.................................................................................................................................5-92

5.24 70L-BAND UP CONVERTER .......................................................................................................................... 5-93

5.24.1 Overview...............................................................................................................................................5-93

5.24.2 Installation procedure .....................................................................................................................5-95

5.24.3 Operation.............................................................................................................................................5-95

5.24.4 Troubleshooting.................................................................................................................................5-95

5.25 L70-BAND DOWN CONVERTER ....................................................................................................................5-96

5.25.1 Overview...............................................................................................................................................5-96

5.25.2 Installation procedure .....................................................................................................................5-98

5.25.3 Operation.............................................................................................................................................5-98

5.25.4 Troubleshooting.................................................................................................................................5-98

5.26 10 MHZ REFERENCE ....................................................................................................................................5-99

5.26.1 Overview...............................................................................................................................................5-99

5.26.2 Installation procedure ...................................................................................................................5-100

5.26.3 Operation...........................................................................................................................................5-101

5.26.4 Troubleshooting...............................................................................................................................5-101

5.27 POWER DISTRIBUTION UNIT (PDU) ...........................................................................................................5-102

5.27.1 Overview.............................................................................................................................................5-102

5.27.2 PDU Installation Procedure .........................................................................................................5-103

5.27.3 PDU Troubleshooting.....................................................................................................................5-104

5.27.4 RF Components ...............................................................................................................................5-105

5.27.5 Test Equipment ............................................................................................................................... 5-109

5.28 ARCLIGHT SYSTEM RACKS .........................................................................................................................5-110

5.28.1 Rack Dimensions ............................................................................................................................ 5-110

5.28.2 Mounting ...........................................................................................................................................5-110

5.28.3 Cooling................................................................................................................................................5-110

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List of Figures

Figure 1-1. A-PCMA Bandwidth Reuse...................................................................................................................1-2

Figure 1-2. A-PCMA Level Diagram. ........................................................................................................................1-3

Figure 1-3. ArcLight

Figure 1-4. Generic ArcLight Hub Interfaces........................................................................................................1-8

Figure 1-5. ArcLight Hub System Network............................................................................................................1-9

Figure 1-6. ArcLight

Figure 1-7. Software Relationships ........................................................................................................................ 1-11

Figure 1-8. Packet Format. ....................................................................................................................................... 1-13

Figure 1-9. Communications between RTNMS, MCD, and VMT. ................................................................. 1-15

Figure 1-10. Addressing in the ArcLight Network.............................................................................................1-19

Figure 1-11. IP Traffic Diagram (Non-TCP)..........................................................................................................1-26

Figure 1-12. IP Traffic Diagram (TCP) ...................................................................................................................1-27

Figure 2-1. ArcLight Client Desktop Icon ............................................................................................................... 2-1

Figure 2-2. ArcLight Management Client Screen.................................................................................................2-2

Figure 2-3. ArcLight Management Client Screen – Three Hub Systems Displayed..................................2-4

Figure 2-4. ArcLight Management Client Screen - Manage Hub Components Screen............................2-5

Figure 2-5. The About ArcLight NMS panel – About This Hub Selected......................................................2-5

Figure 3-1. Login Screen – One Hub in Configuration. ..................................................................................... 3-2

Figure 3-2. Session Drop-down Menu. ...................................................................................................................3-2

Figure 3-3. ArcLight Management Client Screen – Three Hubs in Configuration. ..................................3-3

Figure 3-4. Edit Network Component Popup Screen (for a MCD named “My MCD”)..............................3-5

Figure 3-5. Session Drop-down Menu. ...................................................................................................................3-6

Figure 3-6. VMTs Drop-down Menu. .......................................................................................................................3-6

Figure 3-7. Window Drop-down Menu....................................................................................................................3-7

Figure 3-8. Help Drop-down menu. .........................................................................................................................3-7

Figure 3-9. Hub Diagram Context Menu Screen for MCD................................................................................3-8

Figure 3-10. Window Pulldown Menu. ....................................................................................................................3-9

Figure 3-11. Login Screen. ........................................................................................................................................3-14

Figure 3-12. Exit Question. ......................................................................................................................................3-14

Figure 3-13. VMTs Drop-down Menu. ................................................................................................................... 3-15

Figure 3-14. VMT Configuration Screen – General Tab...................................................................................3-17

Figure 3-15. VMT Configuration Screen – Group Management Tab...........................................................3-19

Figure 3-16. VMT Configuration – Installation Utilities Tab..........................................................................3-21

Figure 3-17. Open VMT Screen. ..............................................................................................................................3-23

Figure 3-18. Delete VMT............................................................................................................................................3-24

Figure 3-19. VMT List................................................................................................................................................. 3-25

Figure 3-20. VMT Filter Options Screen............................................................................................................... 3-26

Figure 3-21. IP Network Configuration screen – Interfaces Tab...................................................................3-28

Figure 3-22. IP Network Configuration screen – Network Services - SSH/SFTP tab ............................. 3-30

Figure 3-23. IP Network Configuration screen – NAT Tab.............................................................................. 3-32

Figure 3-24. IP Network Configuration Screen – DHCP Tab..........................................................................3-34

Figure 3-25. IP Network Configuration screen – DNS Tab. ............................................................................3-36

Figure 3-26. IP Network Configuration screen – Routing Tab.......................................................................3-37

Figure 3-27. Customer Configuration Screen.....................................................................................................3-39

Figure 3-28. VMT Status – General Tab Screen. ...............................................................................................3-41

Figure 3-29. VMT Status – Management Tab Screen.......................................................................................3-43

Figure 3-30. VMT Status – Forward Link Tab Screen...................................................................................... 3-45

Figure 3-31. VMT Status – Return Link Tab Screen. .......................................................................................3-46

Figure 3-32. VMT Status – FLR Tab Screen. ....................................................................................................... 3-48

Figure 3-33. VMT Status – Aircraft Tab Screen. ................................................................................................3-50

Figure 3-34. VMT Status – Chassis Tab Screen. ...............................................................................................3-52

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Network Topology...............................................................................................................1-4

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Interface to Terrestrial Networks. ...............................................................................1-10

ArcLight Hub User’s Guide

Figure 3-35. VMT Status – ACU Tab Screen. ......................................................................................................3-53

Figure 3-36. Window Drop-down Menu. ..............................................................................................................3-54

Figure 3-37. Help Drop-down menu. .....................................................................................................................3-55

Figure 3-38. NMS Main Interface Management Menu. .................................................................................... 3-56

Figure 3-39. NMS Main Interface Screen. ............................................................................................................3-57

Figure 3-40. Hub Status Screen, General Tab. ..................................................................................................3-58

Figure 3-41. Hub Status Screen, VMTs Tab. ...................................................................................................... 3-61

Figure 3-42. Hub Status Screen, Utilization Tab, Forward Links Tab. ...................................................... 3-63

Figure 3-43. Hub Status Screen, Utilization Tab, Return Links Tab..........................................................3-65

Figure 3-44. Hub Status Screen, Utilization Tab, Congestion Control Groups Tab. .............................3-67

Figure 3-45. Hub Configuration – General Tab ..................................................................................................3-69

Figure 3-46. Hub Configuration Screen – Congestion Control Tab.............................................................3-71

Figure 3-47. Hub Configuration Screen – ATI Tab............................................................................................ 3-73

Figure 3-48. Manage Satellites – Satellite Configuration Screen. ................................................................3-75

Figure 3-49. Transponder Configuration Screen – Forward and Return Links Tab. .............................3-76

Figure 3-50. Transponder Configuration Screen – Power Control Tab. .....................................................3-78

Figure 3-51. Forward Link Profile Screen – General Tab. ................................................................................3-80

Figure 3-52. Forward Link Profile Screen – Advanced Tab. ...........................................................................3-82

Figure 3-53. Return Link Configuration Screen. ...............................................................................................3-84

Figure 3-54. Manage Air Channels Screen. .........................................................................................................3-86

Figure 3-55. Manage Power Control Profile Screen. .........................................................................................3-89

Figure 3-56. NMS Main Interface Screen. ............................................................................................................3-91

Figure 3-57. Edit Hub Component Screen. .........................................................................................................3-91

Figure 3-58. MDLS Configuration Screen............................................................................................................3-92

Figure 3-59. Main Hub NMS Client Screen - Manage Hub Selected...........................................................3-94

Figure 3-60. The About ArcLight NMS panel – About This Hub Selected. ................................................3-95

Figure 3-61. NMS Edit Component Screen for MCD .........................................................................................3-96

Figure 3-62. Hub Diagram, Selecting the NMS...................................................................................................3-97

Figure 3-63. NMS Client Settings Screen.............................................................................................................3-98

Figure 3-64. NMS Server Settings. .........................................................................................................................3-99

Figure 3-65. User Manager Screen – Users Tab. ............................................................................................. 3-100

Figure 3-66. User Configuration Screen – General Tab. ...............................................................................3-102

Figure 3-67. User Configuration Screen – Network Access..........................................................................3-104

Figure 3-68. Event Streamer Screen. ..................................................................................................................3-106

Figure 3-69. Streamer Drop-down Menu. ..........................................................................................................3-107

Figure 3-70. Event Streamer Filter Screen........................................................................................................3-109

Figure 3-71. Log Manager Screen – Network Hardware. ...............................................................................3-112

Figure 3-72. Authority Level Configuration Screen – General Tab. ...........................................................3-114

Figure 3-73. Authority Level Configuration Screen – Permissions Tab....................................................3-116

Figure 3-74. RtNMS Screen – General Tab........................................................................................................3-120

Figure 3-75. RtNMS Screen Messaging Tab......................................................................................................3-122

Figure 3-76. RtNMS Screen, ATI Statuses Tab. ...............................................................................................3-124

Figure 3-77. RtNMS Screen, Advanced Tab. .....................................................................................................3-125

Figure 3-78. MCD Administration Screen – General Tab. ............................................................................3-127

Figure 3-79. MCD Administration Screen – Statistic Tab. ........................................................................... 3-129

Figure 3-80. MCD Configuration Screen - General Tab................................................................................3-131

Figure 3-81. MCD Configuration Screen - Network Interfaces Tab ........................................................... 3-133

Figure 3-82. MCD Configuration Screen – Additional IPS Tab. ..................................................................3-135

Figure 3-83. MCD Configuration Screen - IP Forwarding Tab. ...................................................................3-137

Figure 3-84. MCD Configuration Screen - Static Routes Tab. ....................................................................3-139

Figure 3-85. MCD Configuration Screen - Logging Tab. ...............................................................................3-141

Figure 3-86. MCD Configuration Screen – Traps Tab....................................................................................3-143

Figure 3-87. MCD Status screen – General Tab ..............................................................................................3-145

Figure 3-88. MCD Status screen - Advanced Tab ...........................................................................................3-147

Figure 3-89. CDC Status List screen...................................................................................................................3-149

Figure 3-90. Accessing the FLM Status Screen.................................................................................................3-150

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Figure 3-91. FLM Administration Screen...........................................................................................................3-151

Figure 3-92. FLM Configuration Screen.............................................................................................................3-153

Figure 3-93. FLM General Status Dialog............................................................................................................. 3-154

Figure 3-94. FLM Advanced Status Dialog. .......................................................................................................3-156

Figure 3-95. HC Edit Component Screen............................................................................................................3-158

Figure 3-96. Hub Canceller Administration Screen. ......................................................................................3-159

Figure 3-97. Hub Canceller Configuration Screen..........................................................................................3-161

Figure 3-98. Hub Canceller General Status Dialog..........................................................................................3-163

Figure 3-99. Hub Canceller Advanced Status Dialog.....................................................................................3-165

Figure 4-1. TermViewer Status Screen...................................................................................................................4-3

Figure 4-2. TermViewer Status Screen – Log File Entered...............................................................................4-6

Figure 4-3. TermViewer Status Screen in “Wait” Status...................................................................................4-7

Figure 4-4. TermViewer Status Screen Displaying Status of Port 7104. .....................................................4-8

Figure 4-5. Identifying a VMT and IP address with IsItUp. ............................................................................4-10

Figure 4-6. Example of APR Server Log File........................................................................................................4-13

Figure 5-1. ArcLight Blade System. .........................................................................................................................5-3

Figure 5-2. ABS Front Panel Enclosure................................................................................................................... 5-4

Figure 5-3. ABS Rear Panel Enclosure. ..................................................................................................................5-5

Figure 5-4. Front (left) and Rear (right) Panels of a Blade Server (MDC II Giga-E). .................................5-6

Figure 5-5. Server Assignment and Physical Slot Numbering of ABS Front Chassis..............................5-7

Figure 5-6. Server Assignment and Physical Slot Numbering of ABS Rear Chassis. ..............................5-8

Figure 5-7. ABS Physical Slot Numbering for ABS Front Panel. ....................................................................5-8

Figure 5-8. ABS Power Supply Tray.........................................................................................................................5-9

Figure 5-9. ABS Rear Panel Power Input, Fuses and Switches....................................................................5-10

Figure 5-10. ABS Cable Management. ..................................................................................................................5-10

Figure 5-11. Real panel Connectors and Numbering Scheme........................................................................5-11

Figure 5-12. ABS Bottom Fan Tray. ........................................................................................................................5-12

Figure 5-13. ABS Air Flow Pattern. ........................................................................................................................5-13

Figure 5-14. Interfaces between ABS and other Rack Units. ........................................................................5-13

Figure 5-15. NMS Blade Server.................................................................................................................................5-15

Figure 5-16. RtNMS Real Time Server...................................................................................................................5-18

Figure 5-17. Monitor Server......................................................................................................................................5-21

Figure 5-18. Support Server .....................................................................................................................................5-23

Figure 5-19. Front panel of NPTS Blade Server.................................................................................................5-26

Figure 5-20. NAS Front Panel. .................................................................................................................................5-28

Figure 5-21. ArcLight Multi-Channel Demodulator (Front View of ABS)...................................................5-31

Figure 5-22. ArcLight Multi-Channel Demodulator (Rear View of ABS). ...................................................5-31

Figure 5-23. ArcLight MCD Management Serial Port Power-up Self-Test Screen................................... 5-35

Figure 5-24. ArcLight MCD Management Serial Port Startup Splash Screen ...........................................5-36

Figure 5-25. Opening an MCD Telnet Session – Example.............................................................................. 5-38

Figure 5-26. MCD M&C ‘uc_show’ Command (Typical). ................................................................................5-39

Figure 5-27. MCD M&C ‘com2_stats’ Command (Typical)..............................................................................5-43

Figure 5-28. MCD M&C ‘sd’ or ‘sky_dump’ Command (Typical)...................................................................5-44

Figure 5-29. MCD ‘fw (fw)’ Command....................................................................................................................5-46

Figure 5-30. MCD ‘mcc_build’ Commands ..........................................................................................................5-47

Figure 5-31. MCD 'atm_len_bin_show' Command .............................................................................................. 5-47

Figure 5-32. MCD ’err_print’ Command (Typical.) ............................................................................................ 5-48

Figure 5-33. MCD ‘memShow’ Command ............................................................................................................5-49

Figure 5-36. FLM Data Flow Diagram...................................................................................................................5-50

Figure 5-37. VFLM-70 Front Panel.........................................................................................................................5-51

Figure 5-38. VFLM-70 Rear Panel ..........................................................................................................................5-52

Figure 5-39. VPCMA-70 Front Panel Controls and Indicators ......................................................................5-59

Figure 5-40. VPCMA-70 Rear Panel Connectors................................................................................................5-60

Figure 5-41. Monitor VMBR Front Panel .............................................................................................................. 5-70

Figure 5-42. Leader VMBR Front Panel ................................................................................................................5-71

Figure 5-43. Policy Router Front Panel LEDs .....................................................................................................5-72

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Figure 5-44. Policy Router Rear Panel Connectors ...........................................................................................5-73

Figure 5-45. PBR Configuration subset example...............................................................................................5-74

Figure 5-46. Compact xPEP TCP/IP Accelerator Front Panel Console.......................................................5-75

Figure 5-47. Compact xPEP TCP/IP Accelerator Rear Panel .........................................................................5-75

Figure 5-48. Compact xPEP Front Panel ...............................................................................................................5-76

Figure 5-49: Compact xPEP Rear Panel .................................................................................................................5-77

Figure 5-50. Ethernet Switch ................................................................................................................................... 5-80

Figure 5-51. Front Panel Indicators .......................................................................................................................5-80

Figure 5-52. Rear panel connectors .......................................................................................................................5-81

Figure 5-53. ASA Front Panel. ................................................................................................................................. 5-82

Figure 5-54. ASA Rear Panel and Connectors....................................................................................................5-83

Figure 5-55. Allot NetEnforcer/DNS Server.................................................................................................................5-84

Figure 5-56. LCD Panel of Traffic Shaper. ...........................................................................................................5-84

Figure 5-57. Traffic Shaper Rear Panel Connectors. ........................................................................................ 5-85

Figure 5-58. Front View of SOL Switch. ...............................................................................................................5-86

Figure 5-59. Rear View of SOL Switch. .................................................................................................................5-86

Figure 5-60. AHRFIU Rear Panel Connectors.....................................................................................................5-88

Figure 5-61. AHRFIU Installation. ........................................................................................................................... 5-88

Figure 5-62. Interfaces of the AHRFIU.................................................................................................................. 5-90

Figure 5-63. KVM Switch............................................................................................................................................5-91

Figure 5-64. KVM Switch Display ............................................................................................................................5-92

Figure 5-65. Front Panel, Up/Down Converter..................................................................................................5-93

Figure 5-66. Rear Panel, Up/Down Converter. ..................................................................................................5-93

Figure 5-67. Front Panel, Up/Down Converter..................................................................................................5-96

Figure 5-68. Rear Panel, Up/Down Converter. ..................................................................................................5-96

Figure 5-69. 10 MHz Precision Time and Frequency Reference. .................................................................. 5-99

Figure 5-70. Front Control Panel of the 10 MHz Reference. .......................................................................... 5-99

Figure 5-71. Rear panel View, 10 MHz Reference. ..........................................................................................5-100

Figure 5-72. PDU Unit (rear view)..........................................................................................................................5-102

Figure 5-73. A and B Load Power to Outlets. ...................................................................................................5-102

Figure 5-74. Power Transfer Process in PDU....................................................................................................5-103

Figure 5-75. PDU Voltage Selector Switch, Input Connectors and LEDs................................................5-104

Figure 5-76. 4.5 meter Earth Station Antenna. ...............................................................................................5-105

Figure 5-77. Beacon Receiver. ...............................................................................................................................5-106

Figure 5-78. 24Vdc BUC Power Supply..............................................................................................................5-106

Figure 5-79. 1:2 Splitter. ......................................................................................................................................... 5-106

Figure 5-80. Signal Generator. .............................................................................................................................. 5-109

Figure 5-81. Spectrum Analyzer. ..........................................................................................................................5-109

Figure 5-82. ArcLight System Cabinets.............................................................................................................. 5-110

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List of Tables

Table 1-1. MCD II Blade Set.......................................................................................................................................1-7

Table 1-2. Functions with Software and Hardware Relationships...............................................................1-11

Table 1-3. Data Segment Length. ...........................................................................................................................1-13

Table 1-4. Chipping Rate Ranges. ..........................................................................................................................1-13

Table 2-1. Initial Client Setup Checklist. ...............................................................................................................2-3

Table 3-1. Icon Color Coding Scheme. ....................................................................................................................3-4

Table 3-2. ArcLight Management Client Main Menu Pulldown Menus ......................................................3-13

Table 3-3. New VMT Addition Checklist............................................................................................................... 3-16

Table 3-4. Code Rate Table.......................................................................................................................................3-81

Table 5-1. NOC Hub Reference Source Requirements........................................................................................5-1

Table 5-2. Serial Port Signal Description ............................................................................................................. 5-32

Table 5-3. MCD Reference Specification...............................................................................................................5-33

Table 5-4. ABS Chassis I/O Requirements. ........................................................................................................5-33

Table 5-5. M&C LED Description. ..........................................................................................................................5-37

Table 5-6. MCD M&C ‘uc_show’ Command – Output Descriptions. ........................................................... 5-40

Table 5-7. MCD M&C ‘com2_stats’ Command – Parameter Descriptions. ................................................5-43

Table 5-8. MCD M&C ‘sd’ or ‘sky_dump’ Command – Parameter Descriptions. .....................................5-45

Table 5-9. MCD ‘err_print’ Command – Field Descriptions............................................................................5-49

Table 5-10. Service Port Signal Description ........................................................................................................5-52

Table 5-11. RF Transmit Interface and Transmit Signal Specifications.....................................................5-52

Table 5-12. FLM Reference Specification .............................................................................................................5-54

Table 5-13. Configuration and Status SNMP Variables................................................................................... 5-56

Table 5-14. VPCMA-70 Front Panel Controls and Indicators........................................................................5-59

Table 5-15. Serial Port Signal Description ...........................................................................................................5-60

Table 5-16. PCMAHC Reference Specification ....................................................................................................5-61

Table 5-17. VPCMA-70 Set Up Quick Guide and Summary..........................................................................5-62

Table 5-18. Initial VPCMA-70 Configuration Setup..........................................................................................5-62

Table 5-19. Front Panel LED Indicators ................................................................................................................5-76

Table 5-20: Rear Panel LED Indicators..................................................................................................................5-79

Table 5-21. AHRFIU Input/Output Specifications (to be updated). ............................................................5-89

Table 5-22. Rack Power Usage. .............................................................................................................................5-103

xiv 1081006 Rev. 001

About This Manual

ArcLight Hub User’s Guide

The ArcLightTM Users Manual is intended to cover all aspects of
operation of the ArcLight System Network pertaining to software
screens and network operation. A companion ArcLight Hardware
Manual covers hardware installation, operation, and troubleshooting.
The ArcLight Users manual is segmented into six main areas.

• Chapter 1 provides a general description of the overall ArcLight

Network

• Chapter 2 addresses initial setup of the network. An NMS Client

Setup Wizard guides the user through the initial client setup
process. This is followed by instructions on setting up the first
ViaSat Mobile Terminal (VMT)

• Chapter 3 covers both the Hub and VMT NMS configuration and

status screens and provides details on how to manage the
ArcLight network. It also provides step-by-step procedures that
are intended to be quick references for frequently used
procedures. Where lengthy procedures are required, check lists
of required information are included to help the user assemble
the necessary data before starting the procedure. It is assumed
that the user is logged on and viewing the screens that are
identified by screen name, so the screen shots are omitted from
Chapter 3

• Chapter 4 provides information on additional network

management tools

• Chapter 5 provides information on the installation, operation

and troubleshooting of the components of the ArcLight System
network. (For hardware installation and troubleshooting topics

TM

refer to the ArcLight

Hub Installation and Maintenance Guide)

Terminology conventions used in this manual include:

Window – refers to screens that can be minimized and recalled from the
program control bar at the bottom of the monitor display.

Tab screens – refers to displays presented from clicking tabs on a main
screen.

Screens – refers to all other displays presented from clicking on
continuation buttons.

Pop-ups – refers to displays presented automatically based on some
action the user has taken, such as confirmation questions, information
confirmations, or error messages.

Tool-tips – refers to descriptive messages displayed by placing the
cursor on an editable field.

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Safety and Operation Precautions

If safety precautions or important setup or opera ti onal information is presented in
this manual, the information will normally be presented just prior to the point where
the hazard or situation is likely to be encountered. Text and indications used to
identify the information are defined as follows:

Warning: This symbol identifies a procedure or practice that, if not

correctly followed, could result in injury, death, or long-term
health hazard.

Caution: This symbol identifies a procedure or practice that, if not

correctly followed, could result in equipment damage,
destruction, or make the equipment not operate properly.

Note: This term provides information that is important to observe.

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Acronyms, Descriptions and Definitions

ACU Antenna control unit An outside controller for an antenna
interfaced to a remote computer.

AGC Automatic gain control An electronic system to control the gain of

a system in order to maintain adequate
performance over a range of input signal
levels.

APR Automated position reporting Automated updating of the location of a

mobile site.

ATI Automated transmit inhibit An automatic control element that blocks

transmissions.

ASW ArcLight setup wizard An automated tool for software
installation and configuration using a

series of windows that lead the user
through the initial setup process.

ATM Asynchronous transfer mode Organizes digital data into 53-

units and transmits them over a physical
medium using digital signal technology.

BB Bulletin board messages A site for the exchange of internet

communications.

BER Bit error ratio the ratio of the number of bits, elements,

characters, or blocks incorrectly received
to the total number of bits, elements,
characters, or blocks sent during a
specified time interval.

BUC Block up-converter Converts a band (or "block") of frequencies

from a lower frequency to a higher
frequency.

CDC Correlator demodulator card A MCD card.

COTS Commercial off the Shelf Software or hardware products, ready-

made and available for sale to the general
public

CT Congestion threshold A limit that initiates congestion control.

CRMA Code reuse multiple access A transmission medium multiplexing

scheme.

CW Continuous wave An electromagnetic wave of constant

amplitude and frequency.

D/A Digital to analog converter A device for converting a digital (usually

binary) code to an analog signal (current,
voltage or electric charge).

byte cell

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DAL Desired access level Level of access required by a user.

dB Decibel A measure of the ratio between two

quantities (power and intensity).

DHCP Dynamic host config. protocol A set of rules used by a communications

device (such as a computer, router or
networking adapter) to allow the device to
request and obtain an Internet address
from a server which has a list of addresses
available for assignment.

DLL Delay locked loop A digital circuit similar to a phase-locked

loop (PLL), with the main difference being
the absence of an internal oscillator.

DMS Degrees, minutes, seconds Position and time measurements.

DNS Domain name system Stores and associates many types of

information with domain names, but most
importantly, it translates domain names
(computer hostnames) to IP addresses.

DSS Digital satellite system The assumed acronym expansion of the

DSS digital satellite television
transmission system used by DirecTV.

Eb/No Energy per bit per noise A parameter used in signal power spectral

density processing and telecommunications

similar to signal-to-noise ratio (SNR). It

defines the SNR per bit and is an
important measure to evaluate and
compare different digital communication
systems.

EIRP Equivalent isotropically Effective isotropic radiated

radiated power power is the amount of
power that would have to

be emitted by an isotropic antenna to

produce the peak power density observed
in the direction of maximum antenna
gain.

Ethernet Switches Cisco rack-mounted servers Switches that run Cisco IOS software.

FEC Forward error correction A system of error control for data

transmission, whereby the sender adds
redundant data to its messages, which
allows the receiver to detect and correct
errors (within some bound) without the
need to ask the sender for additional data.

FLR Forward link receiver The link from a fixed base station to a

mobile user.

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FPGA Field programmable gate array A semiconductor device containing

programmable logic components and
programmable interconnects.

9

GHz Giga-Hertz (10

) Unit of measure. A billion cycles per

second.

GMSK Gaussian minimum shift keying Continuous phase frequency-shift keying.

The baseband modulation is generated by
starting with a bitstream 0/1 and a bit­clock giving a timeslice for each bit. This
is the type of modulation used in Global
System for Mobile Communications (GSM)

- although that system includes
differential encoding of the bitstream,
which makes the overall modulation
behave like a kind of continuous phase
Binary Phase Shift Keying with constant
envelope.

GMT Greenwich mean time A term originally referring to mean solar

time at the Royal Observatory, Greenwich
in England. It is now often used to refer to
Coordinated Universal Time (UTC) when
this is viewed as a time zone, although
strictly UTC is an atomic time scale which
only approximates GMT in the old sense.
It is also used to refer to Universal Time
(UT), which is the astronomical concept
that directly replaced the original GMT.

GUI Graphical user interface A user interface for interacting with a

computer which employs graphical images
and widgets in addition to text to
represent the information and actions
available to the user.

HDLC High-level data link control A bit-oriented synchronous data link layer

protocol developed by the International
Organization for Standardization (ISO).

Hex Hexadecimal A numeral system with a radix or base of

16 usually written using the symbols 0–9
and A–F or a–f.

HUB Central control station A grouping of one or more network

elements (at one or more sites) which
provides network related functions, and is
administered as a single entity.

HTTP Hyper text transport protocol A method used to transfer or convey

information on the World Wide Web.

ID Identification An identifier for a VMT, address, etc.

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IDU Indoor unit Hardware installed within a building

enclosure.

IFL Inter-facility link A communications link between facilities.

IP Internet protocol A unique address that devices use to

identify and communicate with each other
on a computer network utilizing the
Internet Protocol standard.

KVM switch A rack-mounted Avocet switch An ArcLight module that runs Avocet

software.

LAN Local area network A computer network covering a local area,

like a home, office, or group of buildings.

LNB Low noise block converter Used in communications satellite

reception. The LNB is usually fixed on or
in the satellite dish.

LO Local oscillator A device used to generate a signal which

is beat against the signal of interest to mix
it to a different frequency.

MAC Machine address code An address directly understandable by a

computer's central processing unit.

M&C Monitor and control A process to monitor and control the

VMTs of a satellite network.

MCD Multi-channel demodulator Uses a monitor and control card running

VxWorks OS and ViaSat application
software, and a WAM card with no OS,
CDC and UC software.

MDLP Management download protocol A process to manage downloads between

the Hub and its VMTs.

MDLS Management download server An ArcLight server dedicated to managing

download traffic.

MF-TDMA Multi-frequency time division A multi-frequency channel access method
multiple-access for shared medium (usually radio)

networks.

6

MHz Mega-Hertz (10

) Unit of measure, millions of Hertz.

MSPS Mega symbols per second The number of symbols (in millions) that

can be transmitted in a second.

Monitor Server IBM class machine with A server that emulates a remote VMT.
Windows 2000 OS

NAS Network attached storage Dedicated data storage technology that

can be connected directly to a computer
network to provide centralized data access

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and storage to heterogeneous network
clients.

NAT Network address translation NAT involves re-writing the source and/or

destination addresses of IP packets as
they pass through a router or firewall.
This enables multiple hosts on a private
network to access the Internet using a
single public IP address.

NDD Network design document The specification that defines a design.

NMS Network mgm. system An IBM class machine with a SuSe Linux

OS that runs ViaSat’s NMS Client (NRTC),
NMS Server (NRTS), and PostgreSQL
ORDBMS.

NOC Network operations center One or more locations from which control

is exercised over a telecommunication
network. A NOC contains the primary
servers and other equipment essential to
running the network.

NRT NMS Non real-time network mgmt. sys. An IBM class machine with a SuSe Linux

OS that runs ViaSat’s RtNMS application
software.

NRTC Non real-time client See NMS.

rd

NPTS Network performance test server Runs Microsoft FTP Server and other 3

part performance benchmarking tools.

OBO Output power backoff Reduction in transmitting power as

governed by an automatic power control
system.

ODU Outdoor unit Exposed equipment that must meet

specific environmental requirements.

OQPSK Offset quad. phase-shift keying A variant of phase-shift keying modulation

that transmits 4 different values of the
phase and yields much lower amplitude
fluctuations than non-offset QPSK.

ORDBMS Object relational database A relational database management system
mgmt. system that allows developers to integrate the

database with their own custom data
types and methods.

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PBR Policy based router A technique used to make routing

decisions based on policies set by the
network administrator. When a router
receives a packet it normally decides
where to forward it based on the
destination address in the packet, which
is then used to look up an entry in a
routing table. However, in some cases,
there may be a need to forward the packet
based on other criteria, such as the size of
the packet, the protocol of the payload, or
some other characteristic.

PCCC Parallel concatenated A parallel concatenated convolutional
convolutional code coding scheme utilizes tail-biting

nonrecursive systematic convolutional
codes. The associated decoder iteratively
utilizes circular maximum a posteriori
decoding to produce hard and soft
decision outputs resulting in improved
error-correction performance for short
messages.

PCM Parameter change message The parameter change message is sent

from the RtNMS to the VMBR and conveys
the network configuration changes for a
particular VMT. The network
configuration changes may be return
channel parameters, forward channel
parameters, or other network specific
parameters such as APR, Congestion
control, etc.

PCMA Paired carrier multiple-access PCMA enables multiple, lower rate

inbound channels to occupy the same
physical bandwidth as the outbound
transmission.

PCMAHC PCMA hub canceller Allows outbound and inbound satellite

signals to operate in the same satellite
bandwidth.

PEP Performance enhancing proxy A general term referring to any process,

like SCPS, that breaks the TCP end-to-end
connection to avoid setting window sizes
too low.

PIC Peripheral interface controller A family of RISC microcontrollers available

with various on-board peripherals and
programmable memory.

PID Packet identifier An ID for a formatted block of information

carried by a computer network.

xxii 1081006 Rev. 001