Nevion NX4600 User Manual
NX4600 Media Gateway
User’s Manual
Revision: 1.8.6 (5027)
2016-06-03
Valid for SW version 1.8.6.
nevion.com
Contents
1 History 11
2 Introduction 13
2.1 Scope 13
2.2 Warnings, cautions and notes 13
2.3 Heed warnings 14
2.4 Contact information 14
3 Short Product Description 15
3.1 Software options 16
3.2 Hardware options 16
4 Installing the Equipment 17
4.1 Inspect the package content 17
4.2 Installation Environment 17
4.3 Equipment installation 18
4.4 Ventilation 18
4.5 Power supply 19
4.5.1 AC power supply 19
4.5.1.1 Dual AC power supplies 19
4.5.1.2 AC power cable 19
4.5.1.3 Protective Earth/technical Earth 20
4.5.1.4 Connecting to the AC power supply 20
4.5.2 Powering up/down 21
5 Functional Description 23
5.1 Inputs 23
5.2 Monitoring 24
5.3 Seamless IP Protection Switching 24
5.4 Management subsystem 25
5.4.1 Graphical user interface 26
5.4.2 Configuration database 26
5.4.3 Alarm manager 27
5.5 Time synchronisation 27
6 Physical Description 29
6.1 Slot and port numbering scheme 29
6.2 ASI inputs 30
6.3 1PPS input 31
6.4 Alarm/Reset interface 31
6.5 Ethernet ports 32
6.5.1 SFP+ ports 32
6.6 USB port 32
6.7 Technical Earth 32
6.8 Mains power connector 32
6.9 I/O daughter boards 32
6.9.1 H.264/AVC Codec Board 33
6.9.2 ASI Board 33
6.9.3 DVB S/S2 Board 34
6.10 Front Panel Display 34
6.10.1 Using the Front Panel Display 34
7 Operating the Equipment 37
7.1 Accessing the graphical user interface 37
7.2 Password protection 37
7.3 Changing the IP address of the unit 38
7.3.1 Changing IP address via the Web GUI 38
7.3.2 Changing the management port IP address via the terminal interface 39
7.3.3 Changing the IP address via the display 40
7.3.4 Changing the IP address via Detect 40
7.4 Software upgrade 41
7.4.1 NX-HW-S/S2-DEMOD-X2 41
8 WEB Interface 43
8.1 Login 43
8.2 Status header 44
8.3 Status 45
8.3.1 Device Status 46
8.3.2 Elements Status 46
8.3.3 Input Status 47
8.3.4 Thumbnails 47
8.3.5 Current alarms 47
8.3.6 Alarm log 48
8.3.6.1 Live Log 48
8.4 Device Info 51
8.4.1 Product info 51
8.4.2 Alarms 53
8.4.2.1 System alarm config 54
8.4.2.2 System alarm log 54
8.4.2.3 Alarm profiles 55
8.4.2.4 Alarm definitions 55
8.4.3 Chassis Config 55
8.4.4 Time Settings 57
8.4.5 TXP Settings 58
8.4.6 SNMP Settings 59
8.4.7 Configuration Manager 60
8.4.7.1 Save/Load Configs 60
8.4.7.1.1 Save Configuration To File 60
8.4.7.1.2 Load Configuration From file 61
8.4.7.1.3 Load options 61
8.4.7.2 Stored Configurations 62
8.4.8 Maintenance 63
8.4.8.1 General 63
8.4.8.2 Software Upgrade 64
8.4.8.2.1 FTP upgrade 65
8.4.8.3 Features 65
8.4.9 Users 67
8.4.10 GUI Preferences 68
8.5 Network 69
8.5.1 Network overview 70
8.5.1.1 IP Routes 70
8.5.1.1.1 Adding a new IP route 70
8.5.1.1.2 Removing an existing IP route 71
8.5.1.1.3 Applying IP routing changes 71
8.5.1.1.4 Configuring a default gateway for the device 71
8.5.1.2 IP Ping 72
8.5.1.3 IP Snooper 73
8.5.2 Ethernet port 75
8.5.2.1 IP Interface 75
8.5.2.2 Ethernet 76
8.5.2.3 Ethernet alarms 78
8.5.2.4 VLAN 78
8.6 Inputs 79
8.6.1 Inputs Overview 79
8.6.1.1 IP input wizard 80
8.6.1.2 ASI Inputs 83
8.6.1.3 IP Inputs 84
8.6.1.4 SDI Inputs 86
8.6.1.4.1 SDI Configuration 87
8.6.1.4.2 SDI Status Section 87
8.6.1.4.3 Audio Channel Info 87
8.6.1.4.4 Thumbnail 87
8.6.1.5 DVB-S/S2 Inputs 87
8.6.2 Input 89
8.6.2.1 Main 90
8.6.2.1.1 Main (ASI input) 90
8.6.2.1.2 Main (IP input) 93
8.6.2.1.3 Main (DVB-S/S2 input) 95
8.6.2.2 Alarms 97
8.6.2.2.1 TS alarms 97
8.6.2.2.2 Alarm Log and SLA 100
8.6.2.3 IP 102
8.6.2.3.1 Main 103
8.6.2.3.2 Seamless IP Protection Switching 105
8.6.2.3.3 FEC 107
8.6.2.3.4 Buffer regulator 109
8.6.2.3.5 Statistics 112
8.6.2.3.6 Inter Arrival Time 112
8.6.2.4 PIDs 114
8.6.2.4.1 PIDs Grid 114
8.6.2.4.2 PID rates 116
8.6.2.4.3 PID Types 116
8.6.2.4.4 Type Rates 117
8.6.2.5 Services 117
8.6.2.5.1 Service List 117
8.6.2.6 Tables 122
8.6.2.6.1 Tables 122
8.6.2.6.2 Sources 124
8.6.2.6.3 Settings 125
8.6.2.7 PCR 126
8.6.2.8 Packet Dump 129
8.6.2.9 S/S2 131
8.6.2.9.1 Main 132
8.6.2.9.2 LNB settings 135
8.6.2.9.3 Constellation 136
8.6.2.9.4 Statistics 136
8.7 Transform 138
8.7.1 Input Switch 138
8.7.1.1 General settings 139
8.7.1.2 Add/Remove Input 139
8.7.1.3 Automatic Mode 139
8.7.1.4 Manual Mode 140
8.8 Encoder/Decoder 140
8.8.1 Encoder/Decoder Overview 140
8.8.2 Encoder 141
8.8.2.1 Main 142
8.8.2.1.1 General Settings 143
8.8.2.1.2 Video Encoding 143
8.8.2.1.3 Audio Stream 144
8.8.2.1.4 Encoder Status 144
8.8.2.1.5 Thumbnail 144
8.8.2.1.6 Destinations 144
8.8.2.2 Alarms 144
8.8.2.2.1 Encoder alarms 145
8.8.2.3 Video 145
8.8.2.3.1 Main Settings 145
8.8.2.3.2 Advanced Settings 146
8.8.2.3.3 Advanced H264/MPEG2 Settings 147
8.8.2.3.4 Encoding Status 147
8.8.2.3.5 Current Encoder Settings 147
8.8.2.4 Audio 147
8.8.2.5 VBI/ANC Config 148
8.8.2.5.1 VBI Settings 149
8.8.2.5.2 SMPTE 2038 Ancillary data 149
8.8.2.5.3 Ancillary data filter 149
8.8.2.5.4 Anc present 149
8.8.2.6 TS Config 149
8.8.2.6.1 PID Settings 149
8.8.2.6.2 PSI/SI Settings 150
8.8.2.7 Advanced 151
8.8.2.7.1 Signal Loss Settings 151
8.8.2.7.2 Framestore setting 152
8.8.2.7.3 Uploaded Test Image 152
8.8.3 Decoder 152
8.8.3.1 Main 153
8.8.3.1.1 Settings 153
8.8.3.1.2 Decoder source settings 154
8.8.3.1.3 Tune mode 154
8.8.3.1.4 Automatic 154
8.8.3.1.5 Service ID 154
8.8.3.1.6 Manual 154
8.8.3.1.7 Decoding status 154
8.8.3.1.8 Thumbnail 154
8.8.3.1.9 Source details 154
8.8.3.1.10 Destinations 154
8.8.3.2 Alarms 155
8.8.3.2.1 Deocder alarms 155
8.8.3.3 Audio 155
8.8.3.3.1 Currently Decoded Audio Streams 155
8.8.3.4 VBI/ANC Config 156
8.8.3.4.1 Vbi Settings 156
8.8.3.4.2 Smpte2038 Generic ANC 157
8.8.3.4.3 Ancillary data filter 157
8.8.3.4.4 ANC present 157
8.8.3.5 Advanced 157
8.8.3.5.1 Reference Sync Settings 158
8.8.3.5.2 Reference Sync Source 158
8.8.3.5.3 Signal Loss Settings 158
8.8.3.5.4 Uploaded Test Image 159
8.9 Outputs 159
8.9.1 Outputs Overview 159
8.9.2 ASI Output 160
8.9.2.1 Main 160
8.9.3 SDI Output 160
8.9.3.1 Main 160
8.10 Outputs 161
8.10.1 Outputs Overview 161
8.10.1.1 ASI Outputs 162
8.10.1.2 IP Outputs 162
8.10.2 Output 163
8.10.2.1 Main tab 163
8.10.2.1.1 Main (ASI output) 163
8.10.2.1.2 Main (IP output) 164
8.10.2.2 Alarms 166
8.10.2.3 IP Destinations 167
8.10.2.3.1 Main 167
8.10.2.3.2 FEC 169
8.10.2.3.3 Ping 170
8.10.2.3.4 Advanced 171
8.10.3 RIPv2 172
9 SNMP 177
9.1 SNMP agent characteristics 177
9.2 MIB overview 177
9.2.1 Supported standard MIBs 177
9.2.2 Custom MIBs 177
9.2.3 How to use the MIB 178
9.3 Alarm/status related SNMP TRAPs 179
9.3.1 The main trap messages 179
9.3.2 Severity indications 180
9.3.3 Alarm event fields 180
9.3.4 Matching of on/off traps 181
10 Preventive Maintenance and Fault-finding 183
10.1 Preventive maintenance 183
10.1.1 Routine inspection 183
10.1.2 Cleaning 183
10.1.3 Servicing 183
10.1.4 Warranty 184
10.2 Fault-finding 184
10.2.1 Preliminary checks 184
10.2.2 PSU LED not lit / power supply problem 185
10.2.3 Fan(s) not working / unit overheating 186
10.3 Disposing of this equipment 186
10.4 Returning the unit 186
A Glossary 187
B Technical Specification 193
B.1 Physical details 193
B.1.1 Full-width (dual power) version 193
B.2 Environmental conditions 193
B.3 Power 193
B.3.1 AC Mains supply 193
B.4 Input/output ports 194
B.4.1 HD-SDI port 194
B.4.2 DVB ASI port 194
B.4.3 DVB-S/S2 board 194
B.4.4 Ethernet ports 195
B.4.5 Serial USB interface 195
B.5 Alarm ports 195
B.5.1 Alarm relay/reset port specification 195
B.6 Compliance 196
B.6.1 Safety 196
B.6.2 Electromagnetic compatibility - EMC 196
B.6.3 CE marking 197
B.6.4 Interface to “public telecommunication system” 197
C Forward Error Correction in IP Networks 199
C.1 IP stream distortion 199
C.2 Standardisation 200
C.3 FEC matrix 200
C.4 Transmission aspects 203
C.5 Quality of service and packet loss in IP networks 204
C.6 Error improvement 205
C.7 Latency and overhead 206
D Alarms 209
E References 223
1 History
History 11
Revision Date Comments
1.8.6 2016-06-03 – Updated for new SW version
1.6.14 2016-01-19 – Updated for new SW version
1.4.10 2015-10-05 – Updated for new SW version
1.2.12 2015-05-05 – Updated for new SW version
0.4.0 Draft 2015-01-05 – Initial DRAFT version
ID: mediagateway NX4600 User’s Manual Rev. 1.8.6 (5027)
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NX4600 User’s Manual Rev. 1.8.6 (5027) ID: mediagateway
Introduction 13
2 Introduction
2.1 Scope
This manual is written for operators and users of the NX4600 Media Gateway and provides necessary information for installation, operation and day-to-day maintenance of the unit. The manual
covers the functionality of the software version 1.8.6 or later, and continues to be relevant to subsequent software versions where the functionality of the equipment has not been changed. When a
new software version changes the functionality of the product, an updated version of this manual
will be provided.
The manual covers the following topics:
• Getting started
• Equipment installation
• Operating instructions
• WEB interface description
• Preventive maintenance and fault finding
• Alarm listing
• Technical specifications
2.2 Warnings, cautions and notes
Throughout this manual warnings, cautions and notes are highlighted as shown below:
Warning: This is a warning. Warnings give information, which if strictly
observed, will prevent personal injury and death, or damage to personal
property or the environment.
Caution: This is a caution. Cautions give information, which if strictly
followed, will prevent damage to equipment or other goods.
Note: Notes provide supplementary information. They are highlighted for
emphasis, as in this example, and are placed immediately after the relevant
text.
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14 Introduction
2.3 Heed warnings
• All warnings marked on the product and in this manual should be adhered to. The
manufacturer cannot be held responsible for injury or damage resulting from negligence of warnings and cautions given.
• All the safety and operating instructions should be read before this product is installed
and operated.
• All operating and usage instructions should be followed.
• The safety and operating instructions should be retained for future reference.
2.4 Contact information
Our primary goal is to provide first class customer care tailored to your specific business and
operational requirements.
Please contact us at:
Telephone +47 22 88 97 50
Fax +47 22 88 97 51
E-mail support@nevion.com
WEB http://www.nevion.com
Mail and visiting address Nevion
Nils Hansens vei 2
NO-0667 Oslo
Norway
NX4600 User’s Manual Rev. 1.8.6 (5027) ID: mediagateway
Short Product Description 15
3 Short Product Description
The NX4600 is Nevion’s latest generation H.264/AVC compression platform, offering simultaneous encoding and decoding in a compact 1RU form factor.
The NX4600 is an encoder, decoder and media edge adapter all built into one. Up to four baseband
SDI video signals can be encoded using H.264/AVC or MPEG-2 compression and transported over
ASI and IP.
It is also possible to combine encoding and decoding in the same unit which increases flexibility
in deployment of new services and gives a very tight and compact offering for outside broadcast
production applications (sports, news and other live events) and managed media services.
The H.264/AVC Media Gateway includes Nevion’s trademark advanced protection mechanisms
that enable real-time transport of professional media over IP networks with extremely high availability. The NX4600 offers built-in aggregation of TS over IP streams on one or multiple GbE ports.
It’s our goal to offer products that are reliable and easy to use. Therefore, the NX4600 offers an
intuitive and dynamic web interface that offers built-in Transport Stream monitoring of both encoder outputs and decoder inputs, as well as SDI and RTP/IP monitoring - all of which helps
anticipate and correct any issues with input signals or networks should they arise.
Salient features of the NX4600 are:
• PSI/SI table decoding
− Repetition rate monitoring
− Full decoding of all standard PSI/SI tables and descriptors
− Monitoring of ASI and IP encapsulated transport streams
− TR 101 290 Priority 1 monitoring: Sync loss, CC error
− TR 101 290 Priority 2 monitoring: PCR jitter, PTS error
− TR 101 290 Priority 3 monitoring: SI repetition rates
− Monitoring of min/max bitrate for individual PIDs
• Flexible alarm configuration options
− Alarm levels freely configurable individually for each channel
− Individual setting of alarm levels based on PID values
• User-friendly configuration and control
− WEB/XML based remote control
− Easy access to unit from any WEB browser
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16 Short Product Description
− Easy integration to NMS systems with SNMP Trap support
− SNMPv2c agent
• Reception of transport stream over Gigabit Ethernet
3.1 Software options
The NX4600 functionality depends on the software licences installed. The following table describes the features available as software options. Please refer to Section 8.4.8.3 for more information how to obtain and enable feature upgrades.
Table 3.1 Functionality enabled through software licences
Code Max nb
of ports
AMMX 50 Enables advanced monitoring on multi-program
TSOX 80 Enables output of Transport Streams over IP IP outputs
ISWX 50 Enables TS Input switching functionality TS Input Switching
FEC - Enables support for Forward Error Correction on
SIPS - Enables Seamsless IP Protection SIPS
LDO - Enables Launch Delay Offset LDO
Description Key features
ETR 290 Pri 2 and 3, PCR, Table decoding,
transport stream (MPTS)
video data traffic.
Packet dump
FEC
3.2 Hardware options
The NX4600 comes with a variety of hardware options. The product can be ordered with up to
four daughter boards in order to tailor to specific needs in terms of inputs to monitor.
Currently, the four slots on the NX4600 can be populated with any combination of the daughter
boards listed below.
• ASI board (4xASI BNC inputs/outputs)
• H.264/AVC Encoder/Decoder Boards
• DVB-S/S2 board (2xDVB-S/S2 F-connector inputs and 2xASI BNC test outputs)
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Installing the Equipment 17
4 Installing the Equipment
Caution: The NX4600 must be handled carefully to prevent safety hazards
and equipment damage. Ensure that the personnel designated to install
the unit have the required skill and knowledge. Follow the instructions
for installation and use only installation accessories recommended by the
manufacturers.
4.1 Inspect the package content
• Inspect the shipping container for damage. Keep the shipping container and cushioning
material until you have inspected the contents of the shipment for completeness and have
checked that the NX4600 is mechanically and electrically in order.
• Verify that you received the following items:
− NX4600 with correct power supply option
− Power cord(s)
− CD-ROM containing documentation and Flash Player installation files
− Any optional accessories you have ordered
4.2 Installation Environment
As with any electronic device, the NX4600 should be placed where it will not be subjected to
extreme temperatures, humidity, or electromagnetic interference. Specifically, the selected site
should meet the following requirements:
• The ambient temperature should be between 0 and 50◦C (32 and 122◦F).
• The relative humidity should be less than 95 %, non-condensing. Do not install the unit
in areas of high humidity or where there is danger of water ingress.
• Surrounding electric devices should comply with the electromagnetic field (EMC) standard IEC 801-3, Level 2 (less than 3 V/m field strength).
• The AC power outlet (when applicable) should be within 1.8 meters (6 feet) of the NX4600.
• Where appropriate, ensure that this product has an adequate level of lightning protec-
tion. Alternatively, during a lightning storm or if it is left unused and unattended for
long periods of time, unplug it from the power supply and disconnect signal cables. This
prevents damage to the product due to lightning and power-line surges.
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18 Installing the Equipment
CP541
Cool
Air In
Warm
Air Out
Warning: If the NX4600 has been subject to a lightning strike or a power
surge which has stopped it working, disconnect the power immediately.
Do not re-apply power until it has been checked for safety. If in doubt
contact Nevion.
4.3 Equipment installation
The NX4600 is designed for stationary use in a standard 19" rack. When installing please observe
the following points:
• Route cables safely to avoid them being pinched, crushed or otherwise interfered with.
Do not run AC power cables and signal cables in the same duct or conduit.
• The NX4600 has all connectors at the rear. When mounting the unit, ensure that the
installation allows easy access to the rear of the unit.
• The fans contained in this unit are not fitted with dust/insect filters. Pay particular attention to this when considering the environment in which it shall be used.
• Make sure that the equipment is adequately ventilated. Do not block the ventilation holes
on each side of the NX4600.
4.4 Ventilation
Openings in the cabinet are provided for ventilation to protect it from overheating and ensure
reliable operation. The openings must not be blocked or covered. Allow at least 50 mm free airspace each side of the unit.
Warning: Never insert objects of any kind into this equipment through
openings as they may touch dangerous voltage points or create shorts that
could result in a fire or electric shock. Never spill liquid of any kind on or
into the product.
• This product should never be placed near or over a radiator or heat register. Do not place
in a built-in installation (e.g. a rack) unless proper ventilation is provided in accordance
with the device airflow design as depicted in Figure 4.1 .
• The NX4600 may be vertically stacked in 19" racks without intermediate ventilation panels. In systems with stacked units forced-air cooling may be required to reduce the operating ambient temperature.
Figure 4.1 shows the air path through the unit, where cool air is taken from the left hand
side, seen from the front.
Figure 4.1 Air path through the unit
NX4600 User’s Manual Rev. 1.8.6 (5027) ID: mediagateway
Installing the Equipment 19
4.5 Power supply
The NX4600 is delivered rated for AC operation.
Warning: This product should be operated only from the type of power
source indicated on the marking label. Please consult a qualified electrical
engineer or your local power company if you are not sure of the power
supplied at your premises.
4.5.1 AC power supply
The NX4600 has a wide-range power supply accepting the voltage range 100-240 VAC, 50/60 Hz.
Please refer to
4.5.1.1 Dual AC power supplies
Alternatively, the NX4600 may be fitted with dual internal wide-range AC power supplies. The
power supplies cover the voltage range 100-240 VAC, 50/60 Hz.
Appendix B for a detailed specification of the AC power supply.
During normal operation, load-sharing is used between the internal supplies. In case of a single
power supply failure alarms will be raised and the unit will continue operating off the second
power supply. To guard against failure in the external power circuitry it is imperative to connect
each power supply to separate AC mains circuits.
Please refer to Appendix B for a detailed specification of the AC power supply.
4.5.1.2 AC power cable
Ensure that the AC power cable is suitable for the country in which the unit is to be operated.
Caution: Power supply cords should be routed so that they are not likely
to be trod on or pinched by items placed upon or against them. Pay
particular attention to cords at plugs and convenience receptacles.
The unit is supplied with a two meter detachable mains supply cable equipped with a moulded
plug suitable for Europe, UK or USA, as appropriate. The wires in the mains cable are coloured
in accordance with the wire colour code shown in Table 4.1.
Table 4.1 Supply cable wiring colours
Wire UK (BS 1363) EUROPE (CEE 7/7) USA (NEMA 5-15P)
Earth Green-and yellow Green-and yellow Green
Neutral Blue Blue White
Live Brown Brown Black
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20 Installing the Equipment
4.5.1.3 Protective Earth/technical Earth
To achieve protection against earth faults in the installation introduced by connecting signal cables
etc., the equipment should always be connected to protective earth. If the mains supply cable is
disconnected while signal cables are connected to the equipment, an earth connection should be
ensured using the Technical Earth connection terminal on the rear panel of the unit.
Warning: This unit must be correctly earthed through the moulded plug
supplied. If the local mains supply does not provide an earth connection
do not connect the unit.
Caution: Consult the supply requirements in Appendix B prior to connecting the unit to the supply.
The unit has a Technical Earth terminal located in the rear panel. Its use is recommended. This is
not a protective earth for electrical shock protection; the terminal is provided in order to:
1. Ensure that all equipment chassis fixed in the rack are at the same technical earth potential. To achieve this, connect a wire between the Technical Earth terminal and a suitable
point in the rack. To be effective all interconnected units should be earthed this way.
2. Eliminate the migration of stray charges when interconnecting equipment.
Warning: If the terminal screw has to be replaced, use an M4x12mm long
pozidrive pan head. Using a longer screw may imply a safety hazard.
4.5.1.4 Connecting to the AC power supply
Warning: Do not overload wall outlets and extension cords as this can
result in fire hazard or electrical shock. The unit is not equipped with an
on/off switch. Ensure that the outlet socket is installed near the equipment
so that it is easily accessible. Failure to isolate the equipment properly may
cause a safety hazard.
To connect the unit to the local AC power supply, connect the AC power lead to the NX4600 mains
input connector(s) and then to the local mains supply.
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Installing the Equipment 21
4.5.2 Powering up/down
Before powering-up the unit, please ensure that:
• The unit is installed in a suitable location
• The unit has been connected to external equipment as required
Power up the unit by inserting the power cable connected to the power source. When the unit has
finished the start-up procedure, the fans will run at normal speed. Please check that all cooling
fans are rotating. If they are not, power down the unit immediately.
Power down the unit by removing the power supply connector at the rear of the unit.
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NX4600 User’s Manual Rev. 1.8.6 (5027) ID: mediagateway
Functional Description 23
5 Functional Description
The NX4600 Media Gateway is an encoder, decoder and media edge adapter that takes up to three
(fixed chassis), or four (modular chassis) baseband SDI video signals, compresses them using
H.264/AVC or MPEG-2, and aggregates and transmits the streams over IP/Ethernet. It is also
possible to combine encoding and decoding in the same 1RU unit, which increases flexibility and
gives a very tight and compact offering for outsidebroadcast production applications (sports, news
and other live events) and managed media services.
NX4600 includes Nevion’strademark advanced protectionmechanisms that enable real-time transport of professional media over IP networks, as well as built-in monitoring that helps anticipate
and correct any issues with the network or transport should they arise.
Nevion Gateways can be configured via an easy-to-use web interface, which also offers extensive
built-in monitoring. Supervision and Connection management can be performed via Nevion’s
VideoIPath or any 3rd party Network Management System.
This chapter gives a brief description of the inner workings of the NX4600,
Figure
blocks are described in more detail in the following sections.
5.1 shows a functional block diagram of the main components inside NX4600. The different
Figure 5.1 NX4600 block diagram
5.1 Inputs
The input interfaces include up to twenty ASI inputs (BNC connectors) , up to eight DVB-S/S2
inputs , up to 3 SDI inputs per Daughter Board and four Ethernet inputs .
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24 Functional Description
5.2 Monitoring
The Monitoring section provides monitoring of up to hundreds of transport streams on-the-fly. Parameters of the selected transport streams will be monitored and compared against specifications
and specific requirements. The values of critical components can be displayed graphically. An
extensive set of alarms may be programmed, with different severity levels. The content of selected
packets, or groups of packets, may be recorded for examination and/or documentation.
Measurements are made according to the DVB ETR 290 specifications.
5.3 Seamless IP Protection Switching
Seamless IP Protection Switching (SIPS) provides redundancy by protecting the media stream
against errors in the IP network, but in a different manner compared to Forward Error Correction
(FEC). FEC is designed to protect the stream against single or short burst packet losses, whereas
SIPS provides protectionagainst loss of complete data input, for example, due to link or equipment
failure.
The main idea of SIPS is to transmit two identical copies of the media stream over separate network
paths. At the receiver side, the data from the two incoming streams are combined at packet level
to form an error free output data stream.
The combination of diverse path routing and perfect switching provides for the highest possible
Quality of Service, effectively minimizing the effects of random packet losses, burst packet losses,
losses due to fast reroutes, and link failures.
Figure 5.2 SIPS functional overview
Functional description
SIPS operates on the RTP packet level. The receive module buffers both incoming streams, mediating and selecting the most appropriate packets in what is termed active-active merging for use in
de-encapsulation. In this way, if one stream is impaired, good packets are delivered via the other
stream and a good output stream can always be reconstructed.
There will be packet loss at the combined stream only when the packet is received on neither of
the two IP sources. The data stream resulting from combining the two incoming data streams will
then be processed as one RTP packet stream.
Setup
At the transmitter side, the NX4600 allows sending identical copies of the data flow to a user defined list of destinations. When several destinations have been configured for transmission, media
streams are sent to different IP addresses but the streams are identical down to the RTP layer and
are tagged with the same, randomly generated Synchronization Source ID (SSRC). For each destination, the physical or logical VLAN network interface, and IP unicast or multicast destination
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Functional Description 25
addresses are configured. This enables the two data streams to be routed to their respective network paths directly at the NX4600 or at the first subsequent network node. See Section 8.10.2.3
for more information on configuring redundant transmission/IP destinations.
At the receiver side SIPS must be enabled and the IP source parameters for IP flow A and B must
be configured to receive the media streams from the two diverse network paths. For any fully
seamless protection system to function, the dual media feeds presented at the receiver needs to
be essentially coherent i.e. the exact same media feed down to the RTP transport layer. When the
data streams have an identical SSRC value and data format, they are assumed to be identical and
are used for Seamless IP Protection Switching. See Section 8.6.2.3.2 for more info on configuration
of SIPS on the receiver.
Delay compensation
As the A and B flows will typically be routed across network links with different delays, it is
necessary for the SIPS module to wait for a period after the first signal is received before it starts
outputting data, to ensure that the second signal that is received does not need to be written to
the buffer after it is read out.
The SIPS Pre-buffer configuration parameter allows this period to be configured to allow the
system to be able to compensate for the maximum expected differential latency between the A
and B flows, while minimizing the additional delay added to the system.
Launch Delay Offset
If dual redundant network paths for some reason is not available, the Nevion patented technology
Launch Delay Offset (LDO) may be employed on the transmitter side.
This feature makes it possible to introduce a delay to one of the transmitted media streams, and
thereby introducing a temporal redundancy in the transmission. In this situation burst losses
approaching the time delay configured for LDO can be handled by the receiving SIPS engine,
even when only one network path is available.
Note that this setup will give protection against long burst losses, but not against complete network failure. If there is a need to protect against link failures, LDO should be used together with
redundant network paths (routing flow A and B through different network paths).
For information on how to configure LDO, see
Licensing
The SIPS feature requires a licence at the receiving node. No licence is required to configure multiple IP destinations for an output channel on the transmit side.
The LDO feature requires a licence at the transmitting node.
Compatibility
The SIPS feature is fully compatible with and extends the functionality of the SMPTE 2022-7
“Seamless Protection Switching of SMPTE ST 2022 IP Datagrams” standard.
Section 8.10.2.3.1.
5.4 Management subsystem
The management subsystem is a set of modules that handles all the interfaces to monitor and
control the operation of the NX4600.
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26 Functional Description
The management subsystem communicates with the users, both humans and machines, via the
following interfaces:
• Front panel and back panel LEDs for status
• Graphical user interface via Flash application in WEB browser
• SNMP traps on alarms
• SNMPv2c Agent
• TXP (XML Protocol) to retrieve and set configuration and status
• Alarm relays on alarms
• Terminal interface either over Telnet or USB interface for debugging
• FTP server for direct file system access
The management subsystem communicates with other internal modules to make the unit perform
the wanted operations.
5.4.1 Graphical user interface
Operators monitor and control the NX4600 mainly via the Adobe Flash GUI application served
from the device’s WEB server. The GUI application is accessed via a WEB browser that communicates with the configuration framework through an HTTP/XML based protocol.
The device exposes extensive status information to the web GUI providing detailed reports and
real-time monitoring displays to the device administrator.
All the device configuration parameters available on the NX4600 can be controlled from the web
GUI.
5.4.2 Configuration database
The management subsystem processes configuration changes as transactions. All configuration
changes made to the device are validated against the current running configuration before committing them to the device. This limits the risks of the administrator implementing changes that
may cause down-time on the unit due to incompatible configuration settings.
Configurations can be imported and exported via the GUI. It is possible to clone the entire configuration of one device to another by exporting the configuration of one device and importing it to
another.
Configurations exported via the web GUI are formatted as human readable/modifiable XML files.
These files can be viewed or altered using any standard text or XML editor such as Windows
Notepad.
To simplify cloning of devices, certain exported parameters within the XML file are tagged as
device specific and therefore will be ignored when imported to either the same device or another.
These parameters are as follows:
• Device Name and Inventory ID
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Functional Description 27
• IP network parameters
• ASI Port mappings
5.4.3 Alarm manager
The NX4600 contains an integrated alarm manager responsible for consistently displaying the
alarm status of each individual interface.
“Port Alarms” are alarms bound to a specific input or output port via a port indexing system.
The alarm severity for port related alarms can be configured per port level. “Device Alarms”
are global to the device and are not bound to any specific port. They do not follow the indexing
scheme. These are classified as “System Alarms”.
Alarms are graphically represented in a tree structure optimized for simplified individual viewing
and configuration. The “Device Alarm” tree is available from the “Device Info” page. The alarm
tree for each port is available on the “Alarms” page for each port.
The alarm manager presents the alarm of highest severity upon the external interfaces of the device. The severity level of each individual alarm can be defined by the administrator. Alarm
configuration is covered in greater detail in the “Alarm configuration” section.
SNMP traps are dispatched to registered receivers whenever there is an alarm status change.
The alarm manager keeps a log in non-volatile memory of the latest 100000 alarms that have occurred.
5.5 Time synchronisation
The NX4600 contains an internal real-time clock that is used for all internal timestamps. The internal clock is battery backed up in order to continue operating while the unit has no power.
The internal time can be synchronised as follows:
• Manual setting.
• From NTP server using SNTP protocol.
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Physical Description 29
6 Physical Description
Figure 6.1 Front panel of NX4600
The front panel, figure 6.1, provides two LEDs per NX4600. The meaning of the LED indicators is
shown in table 6.1.
Table 6.1 Front panel LED descriptions
Indicator Colour Description
Power Green Indicates power ON and initialisation completed
Alarm Red Lit during reboot and when a critical alarm is active. The alarm severity level to activate the red
LED is configurable
6.1 Slot and port numbering scheme
Figure 6.2 shows the rear panel of the NX4600, with no I/O daughter boards connected in the slots
which are numbered 1-4. These slots can contain up to four daughter boards in any combination
available from Nevion.
Figure 6.3 and 6.4 show the left half of the backplane as examples of one daughter board inserted
in slot number 1. These figures illustrate the port numbering scheme used consistently for the
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30 Physical Description
NX4600. The numbering scheme contains two numbers, where the first is the slot number. The
main board has slot number M (for Main board) and the rest are as shown in figure 6.2. The second
number is an incrementing number, starting at 1, that increments for each extra addition of the
same connector. As an example, the ASI daughter board in slot number 1 would have numbered
the four BNC connectors as 1.1-1.4 as shown in figure 6.3. A DVB-S/S2 daughter board with two
F-connector antenna inputs and two BNC connectors for ASI test output will have a numbering
of 1.1 (first F-connector), 1.1 (first BNC output), 1.2 (second F-connector) and 1.2 (second BNC
output). This is shown in figure 6.4.
Figure 6.2 Rear panel showing slot numbering for NX4600.
Figure 6.3 Example of numbering scheme
using an ASI daughter board for NX4600.
Figure 6.4 Example of numbering scheme using an DVB-S/S2 daughter board for
NX4600.
6.2 ASI inputs
BNC connectors 1 through 4, as shown in figure 6.2 are input ports. Connect the transport stream
input signals to be monitored to any of these connectors. The signals connected to the these input
ports should be valid DVBor ATSC compliant transport streams accordingto the operational mode
of the unit.
Note: that the four slots, numbered 1-4 in figure 6.2 and the cards
contained in them (or the lack of card in them) may vary depending on
the product configuration ordered from Nevion.
NX4600 User’s Manual Rev. 1.8.6 (5027) ID: mediagateway
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