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M3SR Series 4100
Digital Voice Transfer
A relay/rebroadcast station transfers voice as digitally vocoded data stream. Both relay/re-
broadcast radios have to use the same vocoder type and data rate to ensure that there is no
loss of voice data and quality.
Further specific configurations and issues concerning the modes are discussed below.
Rebroadcast Mode
The Rebroadcast Mode is used to connect two IP subnets/waveform nets and transfer
both voice and IP data or just IP data over it. The two radios need only a "back-to-back" con-
nection over their local Ethernet. The subnets may use the same waveform on both sides or
different waveforms. If voice has to be transferred over a Rebroadcast Station, both radios
must use the same vocoder type and data rate (e.g. AMBE2k4 or MELP2k4).
Operating Manual 6175.4760.02 – 01
Rebroadcast / Relay Mode
5.55
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