Q: I am trying to reprogram my DUO and I cannot read back from it with an attached dongle cable.

You may experience difficulties reading back the channel information from an attached DUO if the DUO is within range of its Symphony talkback base unit or is picking up any other signal that is lifting the squelch on the DUO’s receive circuitry. Move to another location away from the Symphony base antenna.

Our programming dongles use the audio circuitry in the talkback units as an interface. In the DUO unit, it is important that the squelch is closed when attempting to reprogram it.  

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