N+M Redundancy
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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 th

n+m redundancy solution Standard architecture with backup units: Frequency f1 Voting system Voting system Voting system N+M architecture for backup units: Backup for Frequencies f1, f2 and f3 Frequency f1 Voting system 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...

■ 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 Q differential audio inputs and outputs ■ Relay inputs and outputs for discrète signais: 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...