DESC: The ADTRAN Total Access 1500 Dual DS0 Dataport is a two-port access module used in the Total Access 1500 platform. It serves as an interface to the basic DDS DS0 (64 kbps) signal to a T-carrier line. The Dual DS0 DP is generally located in either a hub or intermediate office. It is used in conjunction with an ADTRAN Total Access 1500 Dual Office Channel Unit (OCU) dataport located at the end office to extend the DDS network to an end office which has exclusively-served voice channels. In the receive direction, the Dual DS0 DP converts 2.4, 4.8, 9.6, 19.2, and 56 kbps PCM data from the Bank Controller Unit (BCU) at the 64 kbps rate to DDS-formatted 64 kbps signals for transmission. In the transmit direction, it converts the DDS-formatted 64 kbps line signals to 2.4, 4.8, 9.6, 19.2, and 56 kbps PCM data at the 64 kbps rate for handoff to the BCU. Provisioning is accomplished by utilizing the craft interface on the SCU. Subrate error correction, Zero Code Suppression, and latching loo...