Total Reach Office Channel Unit Data Port Installation and Maintenance Practice2 61292006L1-5CDescriptionThe TR OCU DP can interoperate over the carrier system with another TR OCU DP, DS0 DP,TR DDS-DP, 1/0 DCS, or switch. The TR OCU DP can be located in an end office, hub office,intermediate office, or Digital Loop Carrier (refer to Figure 2.)NOTEThe TR OCU DP must be used with an appropriate TR DDS-R unit.Figure 2. Total Reach DDS Circuit DiagramThe TR OCU DP occupies a single channel position in a WECO® -compatible D4 channel bank,AT&T ® SLC-96 terminal, or an ADTRAN ACT 1900/2300 channel bank, providing theinterface between a DS0 time slot of the T-carrier data stream and the 2-wire metallic loopextending to the customer premises.The TR OCU DP span-powers the remote TR DDS-R located at the customer premises. The TRDDS-R converts the 2-wire signal to the traditional 4-wire Alternate Mark Inversion (AMI)signal for transmission to the customer.Features• Two-wire deployment• Repeaterless operation• Bridged tap tolerant• Span power for remote TR DDS-R termination unit• Protected Loopback prevents false latching loopback at 64 kbps• For use in all D4 channel bank and SLC-96 Mode I, II, and III remote terminal applications• NEAR and FAR logic level bantam test access• Loop Quality Monitor and A/B Signaling options• Embedded Digital System 6 capabilities for remote provisioning, configuration, andperformance monitoringT-CarrierD4 or SLC-962-Wire Loop4-Wire CustomerInterfaceTR DDS-RTROCUDP T/R PairCustomer PremisesDSU/CSU