SERIES 2G EQUIPMENT
Aeronautical and Maritime Radiocommunication Systems
N+M
REDUNDANCY
SOLUTION
N+M Redundancy
„„OVERVIEW
Telerad solution for N+M redundancy enables to create
flexible architectures to integrate back-up units alongside
main units. Cost effective solutions exist both for receiver
and transmitter units operating on analog interfaces.
They can be used to secure the transition toward a full-IP
redundancy.
„„ Full analog solution to secure transition toward VoIP
„„ Optimized for small to middle size systems
„„ Complete integration with monitoring
„„ Easy deployment
„„ Flexible configuration:
yy from 1 to 16 main radios
yy 1 or 2 backup radio
„„ Compatible with radios of 9000 series of 1st and 2nd
generation (1G and 2G)
„„ Size: 2U 19’ rack
„„ Outstanding audio quality ensuring no degradation at
system level
„„ High MTBF
„„ Remote monitoring and maintenance via JBUS and
SNMP
40300066 V2.2
This sheet is available on the site www.telerad.fr
„„n+m redundancy solution
Standard architecture with backup units:
Frequency f1
Frequency f2
Backup
Main
Frequency f3
Backup
Main
Backup
Main
Voting
system
Voting
system
Voting
system
VCS
VCS
VCS
N+M architecture for backup units:
Backup for Frequencies f1, f2 and f3
Frequency f1
Main
Frequency f2
Main
Frequency f3
Main
Backup
Backup
Voting
system
VCS
VCS
VCS
This flexible architecture takes full advantage of our software radios capabilities to enable system design of backup solutions
according to system needs: number of frequencies, failure rate, and site configuration.
„„N+M ADVANTAGES
Cost effective solution for main/standby configuration
Higher MTBF with N+2 configurations
Since backup units are multichannel, they can take over for any main unit in the system. Thus, the availability of the system is
improving, which gives a lower failure rate/higher MTTCF.
„„SYSTEM DESIGN
System integration in radio architecture
Redundancy unit integrates fully between VCS links and radio units with no impact on audio quality. Redundancy system autodiagnostic algorithms help to detect broken connections and to calibrate analog links.
Redundancy unit monitors radio failures under JBUS and/or SNMP protocols. It fully integrates alongside external monitoring
systems with few impacts on external monitoring and control.
M+N RADIOS
N VCS LINKS
Radio 2
VCS 2
VCS 3
N+M
Redundancy
Radio 3
Antenna
coupling
Radio 1
VCS 1
Radio N
VCS N
Analog links:
„„ Voice + PTT (EM)
„„ Voice + Call (RE)
JBUS Supervision Link
Radio N+1
Tunable
Cavity Filter
Radio N+2
Tunable
Cavity Filter
External
Supervision
Antenna Sharing
Issues with antenna system have been taken into account. TELERAD takes advantages of its expertise in systems design to
propose efficient architectures that deal with co-siting issues both for transmitters and receivers. Design can be precisely tailored
to customer needs to optimize cost and radio performances.
SERIES 2G EQUIPMENT
„„REDUNDANCY UNIT CHARACTERISTICS
ENVIRONMENT:
Size:
2U – 19-inch rack
Power supply:
24 VDC: 21 V to 31 V – Power supply from radios
Reliability:
„„ High MTBF
„„ Failback configuration in case of redundancy unit failure
Interfaces:
„„ 600 Ω differential audio inputs and outputs
„„ Relay inputs and outputs for discrete signals: PTT, Call
„„ JBUS, SNMP and RS482 for monitoring and
configuration
HIGH QUALITY AUDIO SIGNAL:
Frequency response:
Audio level variation < 1 dB between 300 Hz and 3500 Hz
Audio distortion:
Audio distortion < 0.5 % between 300 Hz and 3500 Hz
Audio level:
„„ Inputs between 0 dBm and -10 dBm
„„ Outputs between 0 dBm and -10 dBm
SYSTEM EASY DEPLOYMENT & INTEGRATION:
Auto configuration:
„„ Algorithm for automatic detection of radios on JBUS
links
„„ Algorithm for automatic calibration of analog link with
radios and VCS
Auto diagnostic:
Algorithm for automatic detection of broken or faulty links.
Built In Test: in case of failure unit fail back in default
configuration
Easy maintenance on radio:
Enables to force a radio offline to perform maintenance
Reporting to Supervision:
„„ SNMP server
„„ JBUS slave
„„ RS232 terminal
„„ Reports current state of switching matrix and radios
availability
Non contractual document
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