The DM4000 series radios now support per channel output. Using this feature, you can have one of the accessory connector pins (17; 19; 20; 21; 22 and 24) toggle state whenever the radio user is on that channel. This feature is supported on analogue and digital conventional channels.
It is now also possible to make the DM4000 series radio give a channel voice announcement when the channel is changed via the one of the GPIO pins. Previously, when the channel was changed (steered), there would be no voice announcement.