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Last update: March 2, 2022


A Normal User has 32 normal channels, with key-values of "1" for channel 1 to "32" for channel 32. If a user has extensions then there can be up to 248 channels.

A Channel

Each channel has properties that define the destination of communication and the way talk/listen/cue's/calls are handled. Channel properties define the talk destination, listen source and the way talk/listen/cue/calls are handled.

Channel Assignment

The primary assignment of a channel can be either a User or a Group. When a user is assigned, a private conversation can be started when the talk on this channel is enabled. when this other user talks back this channel will show as active. When a group is assigned the user can talk to all other users that are also member of this group. when any of the other members is talking on this group this channel will show as active.

Listen Override

The listen override is only available when a the primary channel assignment is set to a User. Only a group can be assigned as listen override.


  • multiple follow-spot operators have the Follow-spot group assigned to channel one.
  • The Listen override is set to Director.
  • The director can now talk to all follow-spot operators on a single channel.
  • The Follow-spot operators can only talk to the director.


A channel can be enabled or muted, independently from the volume set. The channel can be easily toggled On and Off without losing the set volume of the channel. Automated listen/mute functions can be changed with the Listen mode property

  • Mute
  • Listen


The channel talk state can be enabled or disabled. When a talk is enabled the incoming audio will be send to the assigned User or Group An enabled talk also holds the way this is triggered. The answer behavior of a receiving channel can depend on what way the talk is triggered. The talk can be enabled and disabled by the PTT button of the corresponding channel. This will result in the Active latched or Active Momentary state. the Active autotalk behavior can be set in the talk mode

Talk triggers
  • Channel talk not-active
  • Channel talk is active due to autotalk
  • Channel talk is active latched
  • Channel talk is active momentary

Talk Mode

The talk mode sets the behavior of the talk button.

mode description
Disabled The talk button is disabled
Momentary Talk button acts Momentary (push-to-talk)
Latch Talk button acts as Latch (toggle)
Latch/Mom Talk button acts as both Latching and Momentary - a short press toggles the talk-state, - while a long press works as push-to-talk

Channel Mode

Talk settings set the way automatic talks and reply's are handled.

mode description
Default a channel will only be toggled to talk enabled when the talk button is pressed momentary or latch, a GPI triggers the channel or if the answer/reply function is used.
No reply disables all answer/reply functions for this channel
Reply direct when set the the answer/reply wil not trigger the channel but it trigger a direct conversation with the last activated sender
auto reply when enabled this channel will automatically toggle to talk when a incoming talk is received that is not triggered by an auto-reply or autotalk.
Autotalk a channel whit autotalk enabled will be talk active as long as no other channels are active by latch, momentary, GPI or answer
Solo talk when set this channel will temporary toggle all other active talks off as long as this channel is active
GPIO control the channel does not work as communication but sends and receives GPIO signals
Flex a channel in flex mode gives the option to quickly re-assign one of the users or groups from the flexlist


Listen Mode

The listen/mute state of a channel can be toggled by different events.

mode description
Listen on talk the channel will change the state to listen if a channel is muted and the channel is activated by a talk.
Listen on Talk Ignore the channel does not change state when this channel is active. isolate optional
Isolate Ignore Listen on talk is active - channel does not get muted when other channels are active
Fixed Channel does not get un-muted when this channel is active, channel does not get muted when other channels are active


Call Mode

For each channel the sending and receiving of calls can be individually enabled or disabled.

  • disabled
  • receive only
  • send only
  • send and receive

Cue Mode

When a Cue is received the reaction of the receiving channel can be set for each individual channel.

mode description
normal An incoming attention signal can be answered with an ACK. The cue then changes state from attention to hold.
ignore When an attention signal is received this channel can not change the state to hold.
auto answer As soon as the attention signal is received by this channel the ACK is automatically send

when a channel is set to normal the following workflow is used:

  • Standby for cue xx. Someone sends an attention cue to a Group or User.
  • Yes we are standby. The User or any User in the Group can send a ACK. This changes the state to hold.
  • GO cue xx. The sender of the cue now knows that the other side is ready and can send the GO.

When all receiving channels are set to ignore the following workflow is used:

  • Standby for cue xx. Someone sends an attention cue to a Group or User.
  • GO cue xx. The sender of the cue does not know if anyone received the cue. A GO signal can still be send.

when a channel is set to auto answer the following workflow is used:

  • Standby for cue xx. Someone sends an attention cue to a Group or User.
  • there is one device that received this cue the ACK is send automatically when a channel receives the cue. This changes the state to hold.
  • GO cue xx. The sender of the cue now knows that at least one device has received the cue and can send the GO<.

Channel Priority

The priority of a channel can have three levels. a higher priority channel can DIM lower priority ones.

  • Low
  • Normal
  • High


The level for each chanel can be set individually to balance the different channels.

  • Mute
  • -36dB to 24dB

Written by: Chad Phelps, Henk-Jan Blok, Timo Toups