GlossaryGL-37900-A2-GB20-00 March 1998Symmetrical Digital Subscriber Line. A technique for the use of an existing twisted pair linethat permits high bandwidth, bidirectional transmission.SDSL Termination Unit. A generic reference to either an STU-C or STU-R module.SDSL Termination Unit – Central. The module at the CO (central office) or central site endof an HDSL connection. Also known as a Line Termination Unit (LTU).SDSL Termination Unit – Remote. The module at the CP (customer premises) end of anHDSL connection. Also known as a Network Termination Unit (NTU).SDSL Termination Unit – SNMP. The SNMP-compatible version of the MaintenanceProcessor.Transmit Data. Pin 2 of the EIA-232 interface that is used by the DTE to transmit data tothe modem. Conversely, the modem uses Pin 2 to receive data from the DTE.A term for a digital carrier facility used to transmit a DS1 formatted digital signal at1.544 Mbps. It is used primarily in North America.An ITU-T standard for a high-speed, 34-position, DCE/DTE interface.SDSLSTUSTU-CSTU-RSTU-STXDT1V.35
