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Interface port configuration

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ClosedCall signaling and Remote Mic Kill (RMK)

Call signaling is automatic on all audio routes so a call signal can be routed to any destination (2-wire or 4-wire).

Call signaling will be passed to some third party intercom equipment, but it may not be recognized.

RMK is supported and passed through to 2-wire participants only.

Closed2-wire specific port options

Default option is shown in bold.

Device interface settings

Power: Disabled/Enabled. Enable power if you want to power partyline beltpacks from the line. See Power 2-wire beltpacks from the Partyline for more information.

Note: Enabling power will enable termination by default.

Mode: Clear-Com/RTS. For pinouts for each of these see Pinouts.

2-wire specific port settings

  • Input/Output gain: -3 to +3 dB. Default = 0.
  • Termination: Disabled/Enabled. Termination is used to eliminate echo and distortion when 2 or more 2-wire devices are connected. This setting is automatically enabled when power is enabled on the line. It can be toggled on and off as power should only be terminated once within any series of connected devices.
  • Autonull. Autonull should be started whenever 2-wire devices are connected or re-wired. Do not listen in on the headset while autonull is being performed.
Closed4-wire specific port options
Note: To minimize noise, use screened (shielded) cable when connecting 4-wire ports.
  • Input/Output gain: -12 to +12 dB. Default = 0.
  • Port function (sets pin polarity of cable) : to Matrix/to Panel. See Port function: To Matrix (default) or To Panel for more information.
  • Baud rate: 9600 (Drake 4000)/19200 (Eclipse). Select baud rate according to which type of equipment you are connecting.
Closed4-wire + GPIO specific settings
  • Output level: Mic Level (-55db)/Line Level (0 dB).

This setting is used when connecting to devices (like a hand-held radio) where audio connects directly to the mic. This setting works in conjunction with the Output Gain; overall gain = Output Level + Output Gain.

ClosedGPIO action triggers (4-wire + GPIO and IVC-32 ports)

Default option is shown in bold.

GPI action trigger: Disabled/Network Control Event 1/Network Control Event 2/Channel Call Event.

Assign a Network Control Event on detection of a GPI signal).

GPO action trigger: Disabled/Network Control Event 1/Network Control Event 2/Channel Call Event (assign which Network Control Event will trigger the GPO).

GPO Off Delay: None to 2 seconds. This sets a delay on the deactivation of the GPO after a Network Control Event has disappeared.

Test: use to check that the GPO is firing (hardware).

For detailed explanation and examples of how to use Network Control Events see What are Networked Control Events and how do I use them?

ClosedIVC-32 specific port settings

Network Quality: EHX Managed/Very High (LAN)/High (WAN)/Low (internet). The default setting is EHX Managed.

Silence Supression: Enabled/Disabled. When enabled, Silence Supression will detect silence on the line, and will stop transmission and implement comfort noise when this occurs. This conserves network resources.

Settings available on all ports

ClosedPort settings
  • Label: Clicking/touching the blue label header will allow you to change the name of the port. Enter the new name and click the blue check mark to apply changes.
  • Multi-Channel support: Enabled/Disabled. Enable this option to use the audio source in more than one Channel or direct connection.
ClosedVOX (audio-gating)

The VOX setting has several functions:

  • VOX can be used to maximise bandwidth efficiency by detecting when the line is silent and not transmitting at those times.
  • VOX can be used to trigger a Network Control Event (used for sending and receiving GPIO signals) when audio is detected in the Channel.
  • VOX can be used to eliminate unwanted noise, for instance, low level ambient or background noise.
  • VOX mode: Disabled/Fixed Threshold/Adaptive.

If Disabled, VOX is not activated and Network Control Events cannot be configured. Audio is still detected in the Channel, so audio light will show.

Fixed Threshold: triggers VOX detection (audio gating) according to a fixed level . Enabling this option automatically enables Threshold and VOX Delay.

Adaptive: sets the audio trigger according to an automatically calculated 'noise floor'. This option implements comfort noise when silence is detected. Only the Off Delay option is activated with this setting. The Adaptive threshold is not suitable for transmitting music.

  • VOX Off Delay: 0.5 to 4 seconds. Delays the deactivation of the noise gate to allow the signal to stabilize.
  • VOX Threshold: 0 to -42 dB (default = -22 dB). Set the level at which audio is considered valid in the Channel.