Twinkle

Twinkle is a soft phone for Linux. It uses the ALSA drivers for the hardware.

Once I successfully paired the H300 with the Jabra dongle, I had to modify ~/.asoundrc to map the bluetooth devices to ALSA. Bluez registers the device with pulseaudio. I found the device names using 'pactl list'

.h15_sink and .h15_source are arbitrary names.

~/.asoundrc

pcm.h15_sink {
type pulse
device bluez_sink.00_0B_2E_8D_73_B5
hint {
description "Motorola H300 - Speaker"
}
}

pcm.h15_source {
type pulse
device bluez_source.00_0B_2E_8D_73_B5
hint {
description "Motorola H300 - Microphone"
}
}

In Twinkle, select System/Audio and choose 'Other ALSA device' for both the speaker and mic. For the speaker, use 'h15_sink' and for the mic, use 'h15_source' as the 'other names'.