ABR was designed to allow a receiving device to accept transmissions from multiple sending devices all at different speeds without having to be configured for each speed in advance. A character that is used as a reply in communications protocols. An ACK is sent from the receiving device in response to the successful transmission of another character. In SCSI, a terminator that can compensate for variations in the terminator power supplied by the host adapter through means of a built-in voltage regulator. A type of terminator containing a sophisticated circuit that can compensate for variations in the power supplied by the host adapter, as well as variations in bus impedance of complex SCSI systems.
Active terminators works to control the impedance using a voltage regulator.
It cost a little more but will provide more stability and less problems on your part. Low overhead voice digitizing technique. Will produce acceptable voice signals while only requiring a bandwidth of 9.6 Kbps. Aggregate Input Rate Aggregate input rates measure the total data rate of all terminals connected to a multiplexer. Burst aggregate input rate refers to the maximum data rate accepted by the multiplexer at any given instant.