Simplex Conference

Taking Part in a Conference

Enter a conference by dialing the conference directory number, and listen to the conversation going on in the conference. If you want to talk, just press the M-key. The red LED at the station lights to indicate that the microphone is active. Only one person can speak at a time. If you try to press the M-key while someone else is speaking, you will hear a busy tone. While you listen to the conference, the station is free to receive and make ordinary calls. The conference is cut off during ordinary calls and activation of other features. If you try to join the conference and the attempt fails you will hear a failure tone.

You leave the conference by dialing the directory number for Conference Off. When you are talking to the conference, the station is blocked for incoming calls.

It is not possible to select an audio program as long as you are participant in a conference. Any active audio program is turned off when you are taking part in a conference. You will hear a failure tone if you try to select an audio program if you already are a member of a conference.

Lifting the handset blocks the station for incoming calls. The handset dial tone is not turned on when you are participant in a conference.

Default Member

A conference can be set up to have a default participant that is connected as soon as the conference is activated. This is typically used to include mobile radio units in a conference.

Default Speaker

It is also possible to define the default member as default speaker. If no M-keys are pressed, the audio from the default member is distributed into the conference. This can for example be used for surveillance purpose, you can listen to the audio from a station without any notification at the station.

Simplex Conference Priority

A conference has two types of priorities: Setup Priority and Conference Talk Priority.

Setup Conference

The setup priority has two levels:

• Normal
• Alarm
  • Necessary recourses are seized during setup in an AlphaNet system.
  • It remains on during ordinary calls.

Simplex Conference Talk Priority

This priority setting concerns the rights to talk into the conference. There are four priority levels:

• Low
• Normal
• High
• Alarm

The talk priorities are the same as for the SX Conf: Talk Priority setting for each station. A station must have the same or higher priority setting than the conference to be able to talk into the conference.

The Talk priorities can be used in the following way:

• In a bank the Chief Broker can have Alarm Talk priority, but the conferences and all other users can have lower priority. The Chief Broker can then break into any conference and for example stop an ongoing deal.
• A subscriber with lower priority than the conferences can listen to all conferences but not talk into them. This can be a useful application for example at a police station where officers can listen to police radio communication to be informed on what is going on, but only a limited number of persons should be able to talk to the mobile units.

Simplex Conference Talk Override

When this option is activated for a station pressing M-key interrupts the present talker (if the priority setting is the same). This is mainly useful to secure quicker changing of speech.