The SI2WR Slim 2-Wire Interface¶

The SI2WR 2-Wire Interface is a single port 4-wire device, used for integrating a single channel of analogue 2-wire intercom, seamlessly translating both full-duplex audio and call signalling between the two formats. Featuring a full-color OLED display that shows information about channels; configurable by the four buttons on the front of the device with access to many of the same functions and features as most other Green-GO devices.

Connectivity to 2-wire systems is achieved via a single XLR3F. Powered via PoE through a network cable connected to the devices Ethercon port.

The audio line setup is not an automated process. After the 2-wire system is established, an auto null should be undertaken to balance the audio between the two systems. Typically presenting as a single group, this connection also benefits from additional Green-GO features such as program audio and announce functions.

What's in the box?¶

The Green-GO SI2WR slim 2-wire interface comes with the following package contents:

• 1 x Green-GO SI2WR slim 2-wire interface
• 1 x Printed quickstart guide

Device overview¶

Front panel¶

4 Buttons

The four Buttons are used to enter and navigate the setup menu.

4 RGB Status LEDs

The device or channel status is presented by four powerful RGB LEDs.

1 OLED Display

The high contrast, color OLED display presents channel and device information clearly but compactly.

Back panel¶

1 PoE Powered 10/100 Mbps Neutrik EtherCON

The 10/100 Mbps Neutrik EtherCON serves as power input and connection to the local network.

1 Neutrik XLR3-Female 2-Wire Line

A Neutrik XLR3F connector for powered 2-wire system connection.

The user interface¶

The user interface of the SI2WR slim 2-wire interface is compact and straightforward. The user currently linked to the interface is shown on the top.

The currently enabled channel(s) and the signal level coming from the connected 2-wire system are displayed below the username.

On the bottom of the screen, the currently receiving channel(s) is displayed together with the received signal level going to the connected 2-wire system.

Set up a 2-wire connection¶

It is easily possible to configure a 2-wire connection using your device's setup menu. The only prerequesite for this task is a configuration file that includes at least one user and one group.

Preparations¶

Select a user¶

Assuming you have just joined your configuration, the next thing you need to do is select a user for your device or port.

Navigate to the User menu and find the entry Select User to (re-)assign a user.

Setup Menu
└──> User
     ├──> Select User
          └──> Available Users

Assign a channel¶

Before any communication is possible, at least one channel needs to be assigned.

For a simple setup, one channel targeting a group is sufficient for most 2-wire integrations - this allows the device or port to receive communications from multiple users in both systems.

Setup Menu
└──> User
     ├──> ...
     ├──> Channels
          └──> Channel ID
               ├──> Assign: -
                    ├──> Group
                         └──> Available Groups

Configure the channel¶

You need to enable the talk function on a channel to transmit communications coming from the 2-wire system and going to any Green-GO user.

There are many ways to enable the talk function on a channel (e.g., pressing a button, running a script, interfacing with a GPI contact, and more).

However, the easiest is to configure one of the user's channels and set its Channel Mode to either Autotalk or Auto Reply. The latter acts as a remote enable or listen-in where the channel talk is triggered as soon as audio is being received.

Setup Menu
└──> User
     ├──> ...
     ├──> Channels
          └──> Channel ID
               ├──> Assign: Ring A # (1)!
               ├──> ...
               ├──> Listen: On # (2)!
               ├──> Level: 0dB # (3)!
               ├──> ...
               └──> Channel Mode # (4)!
                    ├──> ...
                    ├──> Auto Reply # (5)!
                    ├──> Autotalk # (6)!
                    └──> ...

The audio setup¶

The actual connection is configured inside the 2-Wire Port menu. Here, a few steps need to be taken in a specific order:

1. Configure the autonulling by selecting an appropriate preset for the 2-wire system connected.
2. Ensure Autonull on Boot is disabled to prevent accidental nulling when power-cycling.
3. Configure the call transmission mode according to the 2-wire system connected.
4. Ensure your 2-wire system is connected and all cable leads have proper termination. It is also crucial that all microphones in your 2-wire system are muted to avoid background noise affecting the nulling process.
5. Start nulling the line by selecting the Autonull option.

After the nulling process has been completed, you may want to adjust and optimize the audio connection; this is done by monitoring the VU-meter to the right and changing the properties From 2-Wire and To 2-Wire.

Setup Menu
├──> ...
└──> 2-Wire Port
     ├──> Preset: Techpro # (1)!
     ├──> Autonull
     ├──> Autonull on Boot: Off
     ├──> Call Mode: DC # (2)!
     ├──> From 2-Wire: -
     ├──> ...
     ├──> To 2-Wire: -
     └──> Limiter: Off # (3)!

The setup menu¶

The setup menu allows local access to almost all user and device configuration properties. All changes in the setup menu are done and stored locally on the device but can be easily synced back into the configuration file using the Green-GO Control software. These settings are also persistent on the device unless overwritten.

The setup menu is accessed by sequentially pressing both left-hand buttons (Button 1+Button 2).

Once inside the setup menu, the left-hand buttons will change function:

The Button 1 (top-left) confirms a selection or value while the Button 2 (bottom-left) can be used to either exit the current (sub-) menu or cancel a value selection.

The right-hand buttons (Button 3 and Button 4) are used to move a selection or change a selected value.

A (sub-) menu can be exited either the the menu entry Exit or Cancel, and alternatively with the Button 2 (bottom-left).

Access to the setup menu can be restricted by configuring the security options of a configuration file or user with the help of the Green-GO Control software. In restrictive security configurations, the user may be asked to enter the Tech Pincode before access is given.

Setup Menu
├──> User
│    ├──> Select User
│    │    └──> Users
│    ├──> Channels
│    │    └──> Channel ID
│    │         ├──> Assign
│    │         ├──> Listen Override
│    │         ├──> Listen
│    │         ├──> Level
│    │         ├──> Talk Mode
│    │         ├──> Priority 
│    │         ├──> Listen Mode 
│    │         ├──> Call Mode 
│    │         ├──> Cue Mode 
│    │         └──> Channel Mode 
│    ├──> Special Channels
│    │    ├──> Direct
│    │    │    ├──> Level
│    │    │    ├──> Priority
│    │    │    └──> Cue Mode
│    │    ├──> Program Audio
│    │    │    ├──> Assign
│    │    │    ├──> Level
│    │    │    └──> Dim
│    │    ├──> Announce
│    │    │    ├──> Assign
│    │    │    └──> Level
│    │    └──> Emergency
│    │         ├──> Assign
│    │         └──> Level
│    ├──> Settings
│    │    ├──> Active Time
│    │    ├──> Reply Mode
│    │    ├──> Isolate
│    │    ├──> Tone Level
│    │    ├──> Alert Tone
│    │    ├──> Room
│    │    ├──> Room Dim
│    │    ├──> Room Output
│    │    ├──> Priority Dim
│    │    ├──> Popup
│    │    └──> Cue Timeout
│    └──> Script
│         ├──> Load Script
│         └──> Status
├──> 2-wire port
│    ├──> preset
│    ├──> Autonull
│    ├──> Autonull on boot
│    ├──> Call mode
│    ├──> From 2-wire
│    ├──> Compressor
│    ├──> Gate Threshold
│    ├──> Gate Hold
│    ├──> To 2-wire
│    └──> Output limiter
├──> Device
│    ├──> LED intensity
│    ├──> LED timeout
│    └──> Screen timeout
├──> Connection
│    └──> Mode: Local
├──> Config
│    ├──> Join Config
│    ├──> Default Config
│    └──> Factory Default
├──> Network
│    └──> Dynamic: On
└──> Info
    ├──> Name
    ├──> Config
    ├──> IP
    ├──> Firmware
    ├──> Serial
    ├──> Cloud
    ├──> Encryption
    ├──> Uptime
    └──> Reset Defaults

User¶

The User submenu holds settings for user-relevant configuration like:

• The user that is linked to the device.
• The channel configuration.
• Configuration for the four special channels.
• General user settings (color, communication settings, etc.).
• Script management.

Select User¶

Available Users¶

This menu lists all available users of the active configuration file.

Channels¶

Channel 1 ‒ 32¶

The following is available for each of the 32 channels.

Assign¶

This menu allows selecting a communication target for the channel. Entering this menu will bring up a pre-filter that provides easy access to the active configuration file's available groups and users.

Listen Override¶

This option allows defining a separate listen source for the channel. The user talks to the primary target assigned but listen to the group defined here.

The primary use case allows for commando communications to several recipients while keeping possible feedback private (1 follow-spot caller, multiple follow-spot operators).

Listen¶

A channel can be enabled or muted independently from the set channel Level. The Listen state of the channel can be easily toggled on or off without losing the set channel level.

This option may be influenced by the Listen Mode.

Level¶

This option defines the output level for the channel.

Talk Mode¶

The Talk Mode defines how a channel can be activated for vox communications with the talk button.

Priority¶

A channel can be configured with one of three priorities. For example, when a higher priority channel transmits, communication with lower priority can be attenuated (Priority Dim).

Listen Mode¶

The Listen state defines a muted or unmuted channel. The Listen Mode options define if and how the channel's listen state is toggled.

Call Mode¶

This option defines if call signals can be sent and/or received on the channel.

Cue Mode¶

The Cue Mode defines how an incomming cue signal is handled.

Channel Mode¶

The Channel Mode allows for simple automation that enables complex channel configurations. Things like automatic replies and GPIO control can be configured here.

Special Channels¶

Each user has, in addition to the 32 normal channels, four additional special channels.

• The temporary duplex channel for private communications.
• The passive program audio channel.
• The passive annoucements channel.
• The passive emergency channel.

Direct¶

The direct channel is temporary and functions bi-directional.

The channel gets created as soon as any remote user who isn't configured on any of the 32 channels contacts the user linked to this device (voice communication, call signal, cue signal).

Level¶

This option defines the output level for the channel.

Priority¶

A channel can be configured with one of three priorities. For example, when a higher priority channel transmits, communication with lower priority can be attenuated (Priority Dim).

Cue Mode¶

The Cue Mode defines how an incomming cue signal is handled.

Program¶

The channel for program audio is passive (listen-only), meaning the user can only receive audio on this channel. The channel receives audio through a group, has independent volume control, and supports dimming when the user receives an audio signal on any of his 32 regular channels.

Assign¶

This menu allows selecting a communication target for the channel. Entering this menu will bring up a pre-filter that provides easy access to the active configuration file's available groups and users.

Level¶

This option defines the output level for the channel.

Dim¶

The program audio channel can automatically attenuate as soon as any of the other channels is active.

Announce¶

The announcement channel is a passive channel (listen-only) that transmits with a higher priority as regular channels. Incoming audio transmissions on this channel can attenuate communication on any of the regular channels, depending on the Priority Dim setting.

The announcement channel receives its audio through a group. To send audio to this channel, the configured group needs to be assigned to one of the 32 regular channels of a user.

Assign¶

This menu allows selecting a communication target for the channel. Entering this menu will bring up a pre-filter that provides easy access to the active configuration file's available groups and users.

Level¶

This option defines the output level for the channel.

Emergency¶

The emergency channel is a passive channel (listen-only) that transmits with the highest priority. Incoming audio transmissions on this channel will mute any communication on any of the 32 regular channels.

The emergency channel receives its audio through a group. To send audio to this channel, the configured group needs to be assigned to one of the 32 regular channels of a user.

Assign¶

This menu allows selecting a communication target for the channel. Entering this menu will bring up a pre-filter that provides easy access to the active configuration file's available groups and users.

Level¶

This option defines the output level for the channel.

Settings¶

The user settings configure global communication functions. These settings affect communication on all channels and are not adjustable on a per-channel basis.

Active Time¶

The Active Time defines a delay that keeps the channel active after the last voice transmission has been received. The main use for this is to give users a chance to identify the transmitting channel before it goes inactive again.

Reply Mode¶

The Reply Mode defines the behavior of the Answer/Reply function.

Isolate¶

This function mutes all channels that do not have an active talk enabled. Channels will be unmuted as soon as no channel has the talk function enabled.

This function is helpful to control incoming audio in hectic systems. It limits the received audio to active user communications.

Tone Level¶

The Tone Level defines the loudness for all alarm signals like cue signals and the Alert Call.

Alert Tone¶

This settings defines the alarm signal type for things like Alert Call or cue signals.

Room¶

This setting assigns a user to a room, available in the configuration file.

Room Dim¶

The Room Dim option configures if and how the audio signals from the configured room should be attenuated. The output affected by this setting is defined by the option Room Output.

Room Output¶

The option Room Output defines the hardware output on which audio signals from the configured room will be attenuated. The attenuation itself is configured by the setting Room Dim.

Priority Dim¶

The property Priority Dim defines the amount channels with lower priority that get attenuated as soon as audio is transmitted on higher priority channels. Each of the 32 generic channels can have one of three priorities.

Activating this setting and defining channel priorities will help to manage user stations with high communication traffic.

Popup¶

This setting defines if and what popups are shown to the user.

Cue Timeout¶

This setting defines the hold-time for an outgoing GO cue signal.

Script¶

Loaded Script¶

This menu shows the currently loaded script and allows to load a script stored in the configuration.

Available Scripts¶

This submenu is available by clicking on the currently loaded script and lists all scripts stored in the configuration file.

Status¶

This property shows the current status of the currently loaded script.

2-Wire Port¶

The 2-wire Port menu contains all settings relevant to the 2-wire system integration.

Preset¶

The property Preset allows defining a general input and output gain.

It is generally important to configure this setting correctly to get accurate results from running the AutoNull function.

AutoNull¶

The function AutoNull outputs a sine signal to the 2-wire line to configure the 2-wire connection and adjust a filter that removes the own input signal to avoid audio feedback in the Green-GO system.

AutoNull on Boot¶

The property AutoNull on Boot defines if the AutoNull function is run after boot up.

Call Mode¶

The property Call Mode configures the 2-wire line connector for the electric call signal used by the 2-wire system.

The SI2WR slim 2-wire interface supports call signals (send and receive) using DC, AC, and AC/DC voltages.

From 2-Wire¶

The property From 2-Wire defines the input gain, controlling the audio signal from your 2-wire system.

This setting is automatically adjusted by the AutoNull function but can be adjusted to finetune the audio connection.

Compressor¶

This is a simple Compressor that can be enabled with this setting. It reduces the dynamic range of the input signal by attenuating the louder parts of the signal, making it less likely to transmit distorted audio. When this setting is enabled, the timings of the compressor can be adjusted.

Gate Threshold¶

The option Gate Threshold defines the threshold for the noise-gate to open the line input. Audio signals below the configured threshold will be cut out and not transmitted.

Gate Hold¶

The option Gate Hold defines the hold time after which the noise-gate closes again after being activated once.

To 2-Wire¶

The property To 2-Wire defines the output gain, controlling the volume of Green-GO communications on the 2-wire system.

This setting is automatically adjusted by the AutoNull function but can be adjusted to finetune the audio connection.

Output Limiter¶

The option Output Limiter allows configuring a simple limiter for the line output. The limiter attenuates the loudest part of the audio signal to prevent potential signal clipping.

Device¶

The Device submenu holds settings for the device-relevant configuration.

LED Intensity¶

The option LED Intensity controls the brightness of the status and button backlights.

LED Timeout¶

The option LED Timeout defines if the status and button backlights of the device will be controlled by the Screen Timeout.

Screen Timeout¶

The option Screen Timeout configures a timer that turns off all displays when the device is idle. Any user action or communication received will restart the timer and reactivate the displays.

Connection¶

The connection menu allows changing the connection mode used by the Green-GO Engine. This allows connecting an engine to either a local or a remote network.

• Local connection mode
• Direct IP connection mode
• Cloud ID connection mode

Mode¶

Local¶

This is the default connection mode, allowing for communication with the local network.

This mode doesn't need any configuration. Instead, devices will start to communicate as soon as they are in the same local network and members of the same configuration file.

Direct IP¶

The direct IP connection mode allows connecting the Green-GO Engine to a remote Green-GO BridgeX. This mode will require correct routing and potential port forwarding in case a NAT is used on the receiving end.

This mode is mainly thought out to be used for locally routed connections like a connection via WiFi access points.

IP address¶

The IP address defines the external or public IPv4 address of the remote Green-GO BridgeX.

UDP port¶

The UDP port defines the target bridge port for the remote connection.

Password¶

This defines the authentication password needed for a connection to a bridge port.

Send buffer¶

The send buffer is used to buffer potential jitter on the outgoing connection.

Receive Buffer¶

The receive buffer is used to buffer potential jitter on the incoming connection.

Diagnostics¶

The diagnostics menu contains a number of useful statistics for the incoming and outgoing connections.

Cloud ID¶

The cloud ID connection mode provides an easy way to connect your devices over the internet utilizing the hole punching technique to establish a direct connection through firewalls or routers using NAT.

The cloud ID is provided and generated by a hosted service and can be used to connect and dynamically assign multiple clients. A cloud ID can be requested and used for free by filling out our request form over here.

ID¶

The eight-character cloud ID defines the session for the connection and is needed to authenticate with the cloud service.

Password¶

The eight-character password is needed to authenticate with the cloud service.

Send buffer¶

The send buffer is used to buffer potential jitter on the outgoing connection.

Receive Buffer¶

The receive buffer is used to buffer potential jitter on the incoming connection.

Diagnostics¶

The diagnostics menu contains a number of useful statistics for the incoming and outgoing connections.

Config¶

The Config submenu allows loading configurations onto the device without the use of the Green-GO Control software.

Join Config¶

This submenu lists all active configurations in a local network. However, the configuration currently used by the device will not be shown.

Available Configurations¶

Clicking on any entry will bring up a confirmation screen. Pressing the option Join will load the configuration onto the device.

Default Configuration¶

This submenu allows loading a custom default configuration.

Load¶

The custom default configuration file will be loaded by clicking the' Load' property.

Factory Default¶

This submenu allows loading the factory default configuration file.

Load¶

The factory default configuration file will be loaded by clicking the' Load' property.

Network¶

The Network submenu allows configuring the network interface of the device. The configuration supports two modes (IPv4):

Dynamic: Yes¶

Dynamic: Yes autoconfigures the network interface, either listening to a local DHCP server or autoconfiguring a 169.254.0.0/16 IPv4 address.

Dynamic: No¶

Dynamic: No allows for manual network configuration.

Address¶

The option Address defines the private IPv4 address of the device.

Netmask¶

The option Netmask defines the local subnet of the device.

Gateway¶

The option Gateway defines the local network gateway.

Info¶

The Info submenu makes the essential configuration settings available to view in one place. Some of the options available provide tools for debugging the device or system.

Name¶

This option shows the device name.

Config¶

This submenu shows the information regarding the current configuration file used by the device.

The provided information can be useful when debugging problems regarding devices that are out of sync.

Name¶

This option shows the name of the currently active configuration file.

Stamp¶

This option shows the timestamp of the currently active configuration file.

Sample Rate¶

This option shows the sample rate used by the currently active configuration file.

Multicast IP¶

This option shows the currently set multicast IP of the configuration file.

ID¶

This option shows the unique ID of the currently active configuration file.

IP¶

This submenu shows the current IP address of the device and allows to ping a remote IPv4 target to verify the current network connection.

Ping¶

This option allows defining an IPv4 target to be pinged.

Packets¶

This option allows initiating the ping script, sending out 10 consecutive pings to the defined target. Also, this option acts as a total packets counter, showing how many packets have been sent.

Packet Statistics¶

Lost

Counter showing the numbers of packets lost during the last run of the ping script.

Avg

The average response time recorded for the last run of the ping script.

Min

The minimum response time recorded for the last run of the ping script.

Max

The maximum response time recorded for the last run of the ping script.

Firmware¶

This submenu displays the device's firmware version.

Serial¶

This option displays the device's serial number.

Reset To Defaults¶

This submenu allows resetting the complete device or parts of the configuration back to the factory defaults.

Reset Device¶

This option allows resetting the device configuration back to the factory defaults.

Reset Audio¶

This option allows resetting the audio configuration back to the factory defaults.

Reload User¶

This option allows reloading the current user and all its settings.

Factory Reset¶

This option allows resetting the complete device back to factory defaults.

Technical specifications¶

General¶

Connectors (Neutrik):1 x XLR3F, 1 x RJ45 etherCON (10/100 Mbps)

User controls:4 x Buttons

Display:1 x 0,95" OLED screen (color)

Display resolution:64 x 96 pixel, 15 x 22 mm (H/W)

Power inputs:Power over Ethernet: IEEE 802.3af 48-56 Vdc

Power usage:2,5 Watt typical, 5 Watt max

Dimensions (H/W/D):41 x 95 x 119 mm

Weight:232 g

Environmental:Ambient temperature: 0° ‒ +55° C

2-Wire line¶

Connector (Neutrik):XLR3F

Maximum Level:6 dBu

Nominal Input Level:-24 dBu through -6 dBu

External Power:30 V max

Latency:2-wire input to headset: ~10 ms (wired)

Termination:External, 200-300 Ω between pin 1 and 3

Downloads¶

Firmware¶

• Latest firmware (ZIP archive)
• Firmware archive

Other¶

• Technical drawings (ZIP archive)
• CE-Certificate (PDF)