Zephyr Transmission Modes


Found here is a handy list of Telos Zephyr Transmission modes. Modes can be individually selected for the Transmit and Receive paths.

Stereo and Dual-Mono Modes using two ISDN "B" channels:

  • Layer III Joint-Stereo at 20kHz or 15kHz for maximum fidelity.*

  • Layer III Independent Stereo at 20kHz or 15kHz for lower delay and surround-sound transmission.*

  • Layer III Dual-Mono at 20kHz or 15kHz when each channel has unique audio.*

  • Layer II Joint Stereo at 20kHz for compatibility.*

  • G.722 Dual-Channel at 7kHz for compatibility and/or lowest delay.

Mono Modes using one ISDN "B" channel:

  • Layer III Dual/Mono at 20kHz or 15kHz for maximum fidelity.

  • Layer II Mono at 7.8kHz or 9.8kHz for compatibility (48 kHz sample rate).

  • Layer II Mono at 8.6kHz for compatibility (24 kHz sample rate).

  • G.722 at 7kHz for compatibility and/or lowest delay.

Mono Modes using two ISDN "B" Channels:

  • Layer II Mono-128 at 20kHz for reduced data compression and compatibility.*

Split-Channel Modes using two ISDN "B" channels:

  • Individual mono signals are sent via Layer III and received via G.722 from separate sites.*

ISDN Telephone Mode:

  • G.711 is used to call a standard POTS telephone for low-grade voice communications over a single "B" channel.

* These modes require a stereo capable Zephyr (such as Models 920X or 9302)



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