R&S®RS5400 radio server

Key facts

Quad redundancy architecture
Climax dynamic delay compensation
Voice stream aggregation
M+N radio redundancy
Best signal selection

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Coordinate voice streams in remote radio setups

Together with VoIP, VCMS and NTP servers, the R&S®RS5400 radio server supports the VCS branch of the CERTIUM ecosystem. It centrally manages radio streams and aggregates or splits them accordingly. This optimizes link utilization by effectively eliminating identical audio streams, freeing up channels and making them available. The R&S®RS5400 server also uses best signal selection to centrally process air-ground signals.

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Features & benefits

Link aggregation

Aggregating identical streams to reduce WAN link utilization

The R&S®RS5400 centrally manages radio streams by aggregating or splitting them, reducing link utilization by eliminating identical audio streams. Bandwidth is freed up and made available for other channels, thus enabling ANSPs to enhance capacity.

**Optimize resources and increase capacity** - Link aggregation enables ANSPs to bundle individual links into trunks, helping prevent identical parallel streams.

ED-137 compatibility

A future-proof VoIP system for maximum availability

The R&S®RS5400 radio server communicates with the all-IP CERTIUM®VCS with ED-137-compliant protocols such as R2S, SIP and RTP. Two fully redundant Ethernet interfaces ensure communications with other CERTIUM®VCS system components. The R&S®RS5400 helps prepare for a variety of unexpected circumstances. This and is one of the many factors enhancing overall system availability.

**Standarization for reliability** - Compliance with strict ATC regulations makes for a dependable product and reliable service.

Best signal selection

Ensure top audio quality for air traffic controllers

The best signal selection function is invaluable when parallel audio streams are simultaneously detected at multiple receivers. Best signal selection works together with similar enhancements such as CLIMAX delay compensation to offset unwanted interference phenomena such as multipath or fading. Optimizing radio reception also improves audio spectral richness, ensuring optimal speech quality.

**BSS stabilizes the reception link.** - BSS dynamically adapts to aircraft position, speed and surrounding terrain by choosing the strongest reception signal and compensating for time and phase delay.

Quad redundancy architecture

Rest assured with the signature quadruple backup layout from Rohde & Schwarz

Some applications are sensitive, while others are absolutely critical. Air traffic control is clearly the latter, so Rohde & Schwarz developed the quad redundancy system layout, where each LAN link in the ATC network has two different wired channels with two independent physical interfaces each. A total of four physical interfaces, split into pairs, makes for unprecedented availability, exceeding the 'five nines' (99.999 %) standard.

**Quad redundancy within the CERTIUM ecosystem.** - Two separate, fully redundant networks provide combined overall quad redundancy.

M+N radio backup

Optimize costs and improve availability

In a traditional 1+1 redundant network, each radio has an identical backup waiting on standby. While this configuration clearly has its merits, the M+N topology from Rohde & Schwarz has far better availability and cost effectiveness. The system even covers backup failure, while greatly reducing costs, as fewer standby radios cover more main radios compared to the 1+1 setup.

**M+N redundancy visualized.** - Any of the N redundant hardware units can step in for any of the M main units in the case of a failure.

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