Avaya Nortel Communication Server 1000 Reference page 310

NT6D70 SILC Line card
The transceiver circuits provide four-wire full duplex S/T bus interface. This bus supports
multiple physical terminations on one DSL where each physical termination supports multiple
logical B-channel and D-channel ISDN BRI terminals. Idle circuit-switched B-channels can be
allocated for voice or data transmission to terminals making calls on a DSL. When those
terminals become idle, the channels are automatically made available to other terminals
making calls on the same DSL.
The power on the DSL comes from the SILC, which accepts -48 V from the IPE backplane and
provides 2 watts of power to physical terminations on each DSL. It provides -48 V for ANSI
compliant ISDN BRI terminals and -40 V for CCITT (such as ETSI NET-3, INS NET-64)
compliant terminals. The total power used by the terminals on each DSL must not exceed 2
watts.
The S/T interface logic consists of a transceiver circuit and the DSL power source. This
interface supports DSLs of different distances and different numbers and types of terminal.
The transceiver circuits provide four-wire full-duplex S/T bus interface. This bus supports
multiple physical terminations on one DSL where each physical termination supports multiple
logical B-channel and D-channel ISDN BRI terminals. Idle circuit-switched B-channels can be
allocated for voice or data transmission to terminals making calls on a DSL. When those
terminals become idle, the channels are automatically made available to other terminals
making calls on the same DSL.
The power on the DSL comes from the SILC, which accepts –48 V from the PE backplane and
provides 2 watts of power to physical terminations on each DSL. It provides -48 V for ANSI-
compliant ISDN BRI terminals and –40 V for CCITT (such as ETSI NET-3, INS NET-64)
compliant terminals. The total power used by the terminals on each DSL must not exceed 2
watts.
310 Circuit Card Reference
Comments? infodev@avaya.com
July 2011