Abstract: A remote level measurement system for use in a multi-terminal communications system wherein a plurality of remote terminals are connected to a master terminal by a distribution network for bi-directional transmission of signals. The remote terminals are adapted to receive and transmit signals on the network. work. The master terminal is adapted to transmit an interrogation signal to a selected remote terminal and wait for a period of time sufficient for the interrogation signal to be transmitted to, and detected by, a selected remote terminal and a reply signal to be sent back to the master terminal by the remote terminal. At the expiration of that time the master terminal samples and measures the analog level of the reply signal.

Abstract: A remote level adjustment system for use in a multi-terminal communications system wherein a plurality of remote terminals are connected to a master terminal by a distribution network for bi-directional transmission of signals. The remote terminals are adapted to transmit and receive signals on the network and respond to a polling signal by transmitting signals regarding transactions at respective sites. Each remote terminal includes circuitry for responding to level-setting signals by transmitting reply signals, and variable attenuation circuitry for adjusting, in response to a level-setting adjustment signal, the power level of the signals it transmits. The master terminal is adapted to transmit and receive signals on the network and includes program and circuit means for transmitting a polling signal.