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SNA 4600
Standalone ATM Network Adaptor
Configuration guide
A self-contained system for dial-up wide area networking
of professional quality TV and broadband data …
THOMSON broadcast system reserves the right to change product characteristics
without prior notice.
This document and any updates and/or supplemental information, including any copies
thereof, cannot be reproduced, neither communicated to a third party, without written
© 1999
THOMSON
broadcast systems
Product overview
AAL1 or AAL5
ATM
cell mapping
ASI / PSI(LVDS) or G 703 Serial
MPEG-2 TS or G 703 Data
Streams
34Mb/s, 45 Mb/s, 140 Mb/s PDH or 155 Mb/s SDH
E3, DS3, E4 or STM1G 703
Electr
.
or STM1 MM-FO
or STM1 G957 SM-FO
Tributaries
Interfaces
ATM
Adaptation
ATM
Mux/Demux
Network
Interfaces
SNA 4600
Standalone ARM Network Adaptor
Key features:
Ä A unique network interfaces family
Configuration
guide
SNA 4600 performs the processing of
Ä Self-contained system
MPEG-2 DVB Transport Stream and
other data services for transmission
on PDH/SDH networks under ATM
layering. It is a self-contained system,
perfectly suited for
Ä Powerful ATM multiplexing
Ä Multiple service capability
Ä Dial-up connection capability
broadcasters’ needs
Ä Full duplex transmission
Ä ATM Adaptation Layers type 1 and
type 5 for real time services
Ä Local and remote control capability
Ä DVB, ITU-T and ATM Forum
standards compliant
The SNA 4600 Standalone Network Adaptor connects costumer’s TV equipment to leased lines,
to PDH and to SDH networks but also to ATM networks enabling dial-up transfer of professional
TV at user-selected quality. Allowing processing of other data streams, it features a versatile
multiple service communication network interface.
The SNA 4600 supports serial or parallel MPEG-2 TS, as well as G703 2, 8, 34 or 45 Mbps data
stream tributaries. AAL1 or AAL5 layering may be chosen depending on customer needs and
requested Quality of Service.
The ATM multiplexed services are inserted into a single PDH stream (E3, DS3 or E4) or into an
SDH VC4 virtual container. The SDH output can be configured with either electrical or optical
interfaces.
It is designed as a 3 RU-19", self-contained sub-rack unit. It can be populated with up to 8 boards,
by combining MPEG TS or data streams tributary ATX and ARX cards, and up to two User
Network Interfaces (UNI) boards.
It can be controlled and monitored either from the front panel keypad and illuminated LC Display,
or remotely from the DBE 2930 proprietary manager system through an RS 485 linked DBE 2910
Mediation Unit.
Issued by Network Products Marketing Department
GSNA4600 - 09/1999
THOMSON broadcast systems - All rights reserved
SNA 4600 Functional Block Diagram
p. 2 of 11
SNA 4600
Standalone ARM Network Adaptor
Configuration
guide
Benefits
A unique network interfaces family
Together with the TNA 4600 and CNA 4600 systems, the SNA 4600 forms a unique family of
network interfaces which addresses the variety of needs in network design and throughput, for
single service as well as multiple services architecture.
Self-contained system solution
In one modular compact product, the SNA 4600 offers a comprehensive range of digital video and
data communications services, provides full ATM multiplexing and network single or dual
termination functionality. With the self-contained design of the SNA 4600 system, the Operators
enjoy the benefits of full compatibility between all functions, integrated management and
simplification of configuration and maintenance operations.
Powerful ATM multiplexing
With up to 7 transport stream multiplexing capability within a 3 RU- 19" chassis, the SNA 4600 is
a powerful system, which saves headroom in operational centers (or hubs) for additional
equipment.
Multiple service capability
In addition to its powerful capability MPEG-2 Transport Stream multiplexing, the SNA 4600 offers
through its circuit emulator the capability to mix other digital services in the same telecom network
channel, thus ensuring efficient data transfer and gives the operators the flexibility to adjust the
network communications according to market needs.
Dial-up connection capability (option
The service end-user selects the far-end party and the call parameters by dialling. Connections
are automatically established, performing ATM User-to-Network Interface signalling.
Full Duplex transmission
Thanks to its full duplex transmission capability the CNA 4600 series features universal interfaces
for contribution network interface for MPEG-2 transport whatever the User-to-Network Interface is
(PDH, SDH or leased lines).
ATM Adaptation Layers type 1 and type 5 for real time services
When type 1 Forward Error Correction, Reed Solomon and interleaving can be used to enhance
the residual bit error rate, AAL type 5 can be selected to allow interoperability with AAL type 5 only
based equipment (servers…).
Local or remote control capability
All SNA 4600 components can be controlled and monitored either locally through the menu-driven
illuminated LC Display and front panel keypad which provides monitoring facilities as well as
control of selected parameters.
It can also be remotely managed by the DBS 2930 integrated system manager through an RS 485
bus link which provides a Graphical User Interface for configuration, status and fault monitoring.
DVB, ITU and ATM Forum standards compliant
SNA 4600 strict adherence to DVB and ATM standards ensures interoperability with any other
standard-based equipment.
Issued by Network Products Marketing Department
GSNA4600 - 09/1999
THOMSON broadcast systems - All rights reserved
p. 3 of 11
SNA 4600
Standalone ARM Network Adaptor
Configuration
guide
Features and Capabilities
SNA 4600 Interfaces capability
Tributaries Interfaces capability
Tributary Interfaces are available for:
- Serial DVB-ASI or parallel DVB-SPI formats, in compliance with prEN50083-9 standard, from
2 to 60 Mb/s.
- 2, 8, 34 or 45 Mb/s Data Streams as G703 formatted data tributaries.
Network Interfaces capability
User Network Interfaces are available for:
- PDH Electrical interfaces: 34 Mb/s (E3); 45 Mb/s (DS3); 140 Mb/s (E4)
- SDH Electrical interfaces: 155 Mb/s (STM1 and STS3c - on request)
- SDH Optical interfaces: 155 Mb/s (STM1 and STS3c – on request) Single-Mode or Multi-
Mode Fiber
MPEG-2 TS Processing
The 3 MPEG2-TS packet formats, as defined by DVB, are supported.
The “flying wheel” synchronisation mechanism is in accordance with ETS300813 and ETS 300814
standards; if synchronisation is lost no packet is transmitted.
Circuit Emulation Processing
The Circuit Emulation provides an AAL1 adaptation layer with an interleaved Reed-Solomon
forward error correction mechanism.
Full AIS detection and generation, is propagated thereby enabling clock holdover in event of
signal loss.
ATM Adaptation
ATM multiplexing performs the asynchronous multiplexing of incoming MPEG-2 stream to form a
flow of ATM useful cells. ATM demultiplexing performs the reciprocal function on the basis of VPI
(Virtual Path Identifier) and VCI (Virtual Channel Identifier) filtering.
For G703 Data Stream Tributaries only the ATM Adaptation Layer-1 (AAL1) is available.
ATM Cell Mapping
ATM multiplexing performs the asynchronous multiplexing of the individual tributary data to form a
flow of ATM cells. ATM demultiplexing performs the reverse function on the basis of VPI (Virtual
Path Identifier) and VCI (Virtual Channel Identifier) filtering.
Both functions are simultaneously available.
Dialling (option)
The SNA 4600 offers on-demand connections over a B-ISDN systems. The signalling protocol
supported conforms to the ATM Forum UNI 3.1 protocol.
The ATM multiplexer allows for 7 access points for on-demand connections (Virtual Ports). Each
tributary board can be linked to these Virtual Ports.
Three kinds of connections can be set up: one way point-to-point, one way point-to multipoint and
two way (point-to-point) connections.
In the point-to-multipoint mode, up to 7 remote users can be connected simultaneously.
As specified by the UNI3.1 protocol, the point-to-multipoint connection can be established only by
the sender.
Issued by Network Products Marketing Department
GSNA4600 - 09/1999
THOMSON broadcast systems - All rights reserved
p. 4 of 11
SNA 4600
Standalone ARM Network Adaptor
Configuration
guide
Control and management
The SNA 4600 (configuration) can be controlled and managed either locally through its front panel
keypad and LC display, or remotely through an RS 485 link by the DBS 2910 main system
manager.
The parameters that the user can control are: Tributary mix, Tributary modes, VPI/VCI, ATM
Adaptation Layer type (AAL1/AAL5); Max Cell Rate; Physical Layer configuration.
Monitoring
Extensive monitoring, troubleshooting and performance data gathering of the SNA 4600 are
achieved either through the front panel MMI or under the DBS 2930 system manager
One dry loop alarm is available on the equipment
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p. 5 of 11
SNA 4600
Standalone ARM Network Adaptor
Configuration
guide
Product outlook
The SNA 4600 is designed as a 3 RU - 19", standalone, rack mounted chassis.
Eight rear panel slots are available for tributaries and network interfaces boards, under the
following limitations:
- Single UNI configuration: up to 7 TX or RX cards
- Dual UNI configuration: up to 3 TX or RX cards per UNI card
Two other rear panel slots are dedicated to power supply units with active redundancy capability
(optional).
A 15-pin SubD connector is provided for remote management.
A 9-pin SubD connector is provided for dry contact alarm.
Front Panel
(Dual UNI configuration example)
MPEG2-TS MPEG2-TS MPEG2-TS
SPI SPI SPI
ARX ARX ARX
PLE155SM
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GSNA4600 - 09/1999
THOMSON broadcast systems - All rights reserved
SERIAL
ATX
Back side
SERIAL
SERIAL
ATX
ATX
PLE155SM
TALARM DC ON
SNA 4600
ALARM REMOTE
STAND BY
UNIUNI
O I
TALARM DC ON
TRN22 DC
O I
TRN22 DC
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SNA 4600
Standalone ARM Network Adaptor
Technical Specifications
MPEG-2 TS Tributaries Interface Capability
TX and RX ASI Serial Interfaces:
Comply with EN 50083-9 ASI electrical (DVB-PI)
Data rate: 2 to 60 Mbps
Connector type: Female BNC, 75 Ω impedance
TX and RX SPI Parallel Interfaces (LVDS)
Comply with EN 50083-9 parallel
Data rate: 2 to 60 Mbps
Connector type: Female 25-pin subD, 100 Ω impedance
Data Stream Tributaries Interface Capability
TX and RX Serial Interfaces
Data rates: 2.048 Mbps; 8.8848 Mbps;34.368 Mbps; 44.736 Mbps
ITU-T G 703 standard compliant
Connector type: Female BNC, 75Ω impedance
Jitter tolerance as per ITU- G823
Configuration
guide
User-to-Network Interface Capability
PDH Electrical Interfaces:
Comply with ITU-T G 703
Data rate: 34.368 Mbps (E3); 44.736 Mbps (DS3); 139.264 Mbps (E4)
Connector type: Female BNC, 75Ω impedance
SDH Electrical Interfaces:
Comply with ITU-T G 703
Data rate: 155.520 Mbps (STM-1)
Connector type: Female BNC, 75Ω impedance
SDH Single-Mode Optical Interfaces:
Comply with ITU-T G 957 S1.1 (short haul)
Data rate: 155.520 Mbps (STM-1 & STS3c – on request)
Connector type: SC duplex
SDH Multi-Mode Optical Interfaces:
Data rate: 155.520 Mbps (STM-1 & STS3c - on request)
Connector type: SC duplex
Fiber type: 62.5/125/0.275 NA
Control Interfaces
Front panel illuminated LC Display and keypad
Rear panel 15-pin SubD connector for RS 485 remote control
Rear panel 9-pin SubD connector for two dry contacts alarm.
Issued by Network Products Marketing Department
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THOMSON broadcast systems - All rights reserved
p. 7 of 11
Transmission Capability
Tributaries effective bit rate versus the network bit rate:
Network bit rate (Kbps) Tributaries effective bit rate (Kbps)
34,368 (E3) 29,131
44,736 (DS3) 37,967
139,264 (E4) 118,727
155,520 (STM-1) 128,653
Multiple Service Capability
ATM Multiplexing of MPEG-2 TS and G703 data streams
up to 7 TS for single UNI throughput
up to 2x3 TS for dual UNI throughput
SNA 4600
Standalone ARM Network Adaptor
Configuration
guide
Signalling Capability (option)
Full ATM UNI broadband switched services
(Supports SVC, PVC)
Complies with UNI 3.1
ATM Adaptation Layer
ATM Adaptation Layer type 1 (AAL1)
Compliant with ITU-T recommendation I.363
Compliant with ITU-T recommendation J.82
Bit errors and cell losses correction mechanism RS (128,124) x 47
Adaptive source clock frequency recovery mechanism
ATM Adaptation Layer type 5 (AAL5)
Compliant with ITU-T recommendation I.363
Compliant with ITU-T recommendation J.82
CRC based error detection mechanism
Adaptive source clock frequency recovery mechanism
Management
Services Connections management:
complies with UNI 3.1 ATM Forum protocol
controlled either from front panel keypad (in shortform mode) or from a
remote manager (in explicit mode)
100 port descriptors address book downloadable in NVRAM
SNA 4600 control and monitoring:
operated either from front panel keypad or from a remote manager
Alarm interfaces:
One dry contact alarming on rear panel (configurable)
(9-pin SubD connector)
Issued by Network Products Marketing Department
GSNA4600 - 09/1999
THOMSON broadcast systems - All rights reserved
p. 8 of 11
Power
Auto ranging 100-240 Vac, 50/60 Hz universal power supply
or 48-60 Vdc power supply
90 W maximum, depending on equipment population
Physical
Width 483 mm (19") height 132 mm (3RU) depth 350 mm
Weight 11 kg maximum, fully populated
Operating Conditions
Ambient temperature 0°C to 45°C
Compliance with Standards
− ISO/IEC 13818-1 MPEG-2 TS Layer specification
− ITU-T G. 702 Plesiochronous Digital Hierarchy
− ITU-T G. 707 Synchronous Digital Hierarchy
− ITU-T G. 703 Physical/electrical characteristics of hierarchical digital
interfaces
− ITU-T G. 804 ATM cell mapping into PDH
− ITU-T I.432 B-ISDN UNI – Physical Layer specification
− ITU-T I.361 B-ISDN ATM Layer specification
− ITU-T I.363 B-ISDN AAL Layer specification
− ITU-T J. 82 Transport of MPEG-TS streams
− ITU-T J. 131 Transport of MPEG2 signals in PDH networks
− ITU-T J. 132 Transport of MPEG2 signals in SDH networks
− ETS 300813 DVB interfaces to PDH networks
− ETS 300814 DVB interfaces to SDH networks
− ATM Forum User-Network Interface (UNI) Signalling Specification,
Version 3.1
SNA 4600
Standalone ARM Network Adaptor
Configuration
guide
Issued by Network Products Marketing Department
GSNA4600 - 09/1999
THOMSON broadcast systems - All rights reserved
p. 9 of 11
SNA 4600
Standalone ARM Network Adaptor
Ordering Information
- SNA 4600 chassis
Models Descriptions
N4640000AE SNA4600 single UNI chassis
N4642000AE SNA4600 dual UNI chassis
N4631000AA Power supply CAC 110/220V – 150W
N4630100AA Power supply TRN22DC 48V – 90W
N4631100AA Power supply 48V – 150W, DCI Mode
N4631100BA Power supply 48V – 150W, DCC Mode
- SNA 4600 Tributary Interface Components
Models Descriptions
N4611000AE MPEG-2 TS SPI (parallel) Transmitter board, V4.0
N4611010AE MPEG-2 TS ASI (serial) Transmitter board, V4.0
N4611100AE 2Mbps Data Stream Transmitter board
N4611110AE 8Mbps Data Stream Transmitter board
N4611120AE 34Mbps Data Stream Transmitter board
N4611130AE 45Mbps Data Stream Transmitter board
N4612000AE MPEG-2 TS SPI (parallel) Receiver board, V4.0
N4612010AE MPEG-2 TS ASI (serial) Receiver board, V4.0
N4612020AE MPEG-2 TS SPI (parallel) Receiver board, dual output, V4.0
N4612100AE 2Mbps Data Stream Receiver board
N4612110AE 8Mbps Data Stream Receiver board
N4612120AE 34Mbps Data Stream Receiver board
N4612130AE 45Mbps Data Stream Receiver board
Configuration
guide
− SNA 4600 User-to-Network Interface Components
Models Descriptions
N4620100AE SDH-STM1 Single-mode optical interface board, V4.0
N4620200AE SDH-STM1 Multi-mode optical interface board, V4.0
N4621000AE PDH 34 Mbps (E3) electrical interface board, V4.0
N4622000AE PDH 45 Mbps (DS3) electrical interface board, V4.0
N4623000AE PDH 140 Mbps (E4) electrical interface board, V4.0
N4624000AE SDH 155 Mbps (STM-1) electrical interface board, V4.0
− SNA 4600 options
Model Description
N46SSG31AA UNI 3.1 signalling Software (1 per UNI board )
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p. 10 of 11
Configuration Information
SNA 4600
Standalone ARM Network Adaptor
Configuration
guide
− Single UNI Configuration
N4640000AA
N4621000AA : PLE 34 board
N4622000AA : PLE 45 board
N4623000AA : PLE 140 board
N4624000AA : PLE 155 board
N4620100AA : single mode PLO 155 board
multimodeN4620200AA :
PLO 155
board
N4611000AA : ATx parallel SPIboard
N4611010AA: ATx serial ASI board
N4612000AA : ARx parallel SPI board
N4612010AA : Arx serial ASI board
N4612020AA: ARx dual SPI board
N4631000AA : AC power supply
N4631100AA : DC power supply
− Dual UNI Configuration
N4640000AA
N4621000AA : PLE 34
N4622000AA : PLE 45 board
N4623000AA : PLE 140 board
N4624000AA : PLE 155
N4620100AA : single mode PLO 155
N4611000AA : ATx parallel SPIboard
N4611010AA: ATx serial ASI board
N4612000AA : ARx parallel SPI board
N4612010AA : Arx serial ASI board
N4612020AA: ARx dual SPI board
N4631000AA : AC power supply
N4631100AA : DC power supply
board
board
multimodeN4620200AA :
board
PLO 155 board
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p. 11 of 11
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