Phone In 6 User Handbook
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INTRODUCTION
INTR
ODUC
TION
Phone In 6 Operation
The Base Console is connected to the incoming lines; to a music-on-hold source; to 1 or
2 channels on a mixing desk and to the Remote Control Panel. The Base Console accepts
an incoming call and indicates the ring to the Remote Control Panel. The call is either
automatically answered by the unit and supplied with music-on-hold, or is answered
manually by the user. The user has the following options:
- Send the caller to the mixing desk by assigning it to an on-air channel.
- Place the caller on-hold and send them the music-on-hold signal .
- Drop the call.
During the initial call control there is limited processing being performed by the unit, but
once the call is assigned to an on-air channel, the audio is passed through to the DSP to
provide the highest quality possible for the station output.
DSP Features Of The Phone In 6 System
- Echo-cancellation which cleans the telephone signal to remove any echoes from the
analogue portions of the call and ensures that the mixing desk is only sent the caller audio.
- AGC (automatic gain control) & a Noise Gate which sets the level of the caller audio to a
suitable level for the mixing desk and also reduces the noise floor when the caller is silent.
- Ducking so when both caller and presenter are talking together the DSP can automatically
reduce the level of the caller so that the presenter is always able to talk over the caller, e.g. to
gracefully end a heated call;
- In conference mode the DSP mixes the other caller audio into the sent signal so that each
caller can hear the station output and the other caller in the conference call.
Conferencing Calls & Use of the Cleanfeed/Mix-Minus
The Phone In 6 handles 2 live calls at once and normally each call is connected to a separate
telco channel on a mixing desk. Each channel receives the caller audio and allows the
presenter to talk to the caller off-air (usually via the pre fade listen (PFL) or Cue selection on
the mixer), or to place the caller to air. In both cases the mixing desk outputs audio back to
the caller via the Phone In 6 unit – this is usually the signal from the presenter’s microphone
or a special mix of the station output.
The unit is configured in 2 ways:
Normal Mode
where 2 calls can be handled independently, each with its own caller output
and cleanfeed input.
Conference Mode
where up to 2 calls are mixed within the unit and are presented as a
single audio stream on the output with a single cleanfeed input.
The cleanfeed, also known as mix-minus, is a specific mix from the desk/mixer that contains
all of the radio station output except for the caller himself or herself. In Conference Mode
the unit provides a mix of both callers and the cleanfeed is a mix without either caller. The
unit mixes in the other caller for each signal sent out to the callers.
