Analog channel Designates a bi-directional transfer of data for a single analog loop-start call between an analog device that received the call and the SCbus. Digitized voice or data from the analog device is sent to the SCbus over the analog transmit channel. The response to this call is sent from the SCbus to the analog device over the analog receive (listen) channel.
Analog device Interfaces to an analog loop-start line from the telephone network, receives and converts an incoming call into digitized voice or data, sends this digitized information over the analog transmit channel to an SCbus time slot for transmission to a voice device or other resource for processing. Also receives the processed data via the SCbus, converts this data into an analog voice or analog data signal and then sends the response to the telephone network.
Digital channel Designates a bi-directional transfer of data for a single time slot of a T-1 or an E-1 digital frame between a T-1/E-1 device that connects to the digital service and the SCbus. Digitized information from the T-1/E-1 device is sent to the SCbus over the digital transmit channel. The response to this call is sent from the SCbus to the T-1/E-1 device over the digital receive (listen) channel.
Fax channel Designates a bi-directional transfer of data for a single fax between a fax device processing that fax and the SCbus. Digitized fax from an analog or T-1/E-1 interface device is transmitted over the SCbus to the fax receive (listen) channel for processing by the fax device. The fax device sends signaling or faxes over the fax transmit channel to an SCbus time slot that transmits this information to the analog or T-1/E-1 interface device.
Fax device Processes faxes received or to be transmitted. Incoming fax data is sent from the SCbus over the fax receive channel to the fax device. Fax signaling or fax transmissions are sent by the fax device over the fax transmit channel to the SCbus, then to an analog or T-1/E-1 device that interfaces to the telephone network.
Listen Accepting or taking digitized information transmitted by another device. Indicates that a device is monitoring an SCbus time slot.
Loop-start Indicates a form of signaling associated with the transmission of analog voice signals from the telephone network.
Receive Accepting or taking digitized information transmitted by another device.
SCbus Signal Computing bus. A hardwired connection between Switch Handlers (SC2000 chips) on SCbus-based products for transmitting information over 1024 time slots to all devices connected to the SCbus.
SCbus routing functions Setup communications between devices connected to the SCbus. These functions enable an application to connect or disconnect (make or break) the receive (listen) channel of a device to or from an SCbus time slot.
SCbus time slot Indicates one segment of time out of 1024 segments during which data is broadcast by an SCbus Switch Handler to all other Switch Handlers connected to the SCbus. Functionally, each segment or time slot can be thought of as a connection between the channel transmitting on an SCbus time slot and all channels listening to that SCbus time slot.
Switch Handler The hardware (SC2000 chip) and firmware that: (1) takes digitized information from on-board devices (transmit channels) and broadcasts this information on their assigned SCbus time slots, (2) takes information received (listen) from an SCbus time slot and sends it to the assigned receive (listen) channel of the on-board device, and (3) disconnects the receive (listen) channel of an on-board device from one SCbus time slot and connects it to another SCbus time slot under application control.
T-1/E-1 device Interfaces to the T-1 (24 time slots/24 voice channels) or E-1 (32 time slots/30 voice channels) digital service provided by the telephone network, converts the incoming digitized data into separate digital channels (digital time slots), sends this digitized data over the transmit digital channel to an SCbus time slot for transmission to a voice device or other resource for processing. Also receives processed data via the SCbus, converts and injects this data into a T-1 or E-1 time slot and sends the entire frame to the telephone network.
Transmit Sending or broadcasting of digitized information by a device.
Voice channel Designates a bi-directional transfer of data for a single call between a voice device processing that call and the SCbus. Digitized voice from the analog or T-1/E-1 interface device is transmitted over the SCbus to the voice receive (listen) channel for processing by the voice device. The voice device sends the response to the call over the voice transmit channel to an SCbus time slot that transmits this response to the analog or T-1/E-1 interface device.
Voice device Performs call processing on voice calls received by either an analog interface device or a T-1/E-1 interface device and transmitted to the voice device via the SCbus. Incoming data is sent from the SCbus over the voice receive channel to the voice device. Responses are sent by the voice device over the voice transmit channel to the SCbus, then to the analog or T-1/E-1 device that interfaces to the telephone network.
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