Avaya Nortel Communication Server 1000 Reference page 306

NT6D70 SILC Line card
the Transmit or Receive leads, or no power at all. When this power is supplied from the S/T
interface, the terminal devices must not draw more than the two watts of power. Any power
requirements beyond this limit must be locally powered.
Other functions of the SILC are:
• support point-to-point and multi-point DSL terminal connections
• execute instructions received from the MISP to configure and control the S/T interfaces
• provide channel mapping between ISDN BRI format (2B+D) and system bus format
• multiplex 4 D-channels onto one timeslot
• perform activation and deactivation of DSLs
• provide loopback control of DSLs
• provide a reference clock to the clock controller
The SILC provides eight S/T four wire full duplex polarity sensitive interfaces that are used to
connect ISDN BRI compatible terminals over Digital Subscriber Loops (DSL) to the Meridian
1. Each S/T interface provides two B-channels and one D-channel and supports a maximum
of eight physical connections that can link up to 20 logical terminals on one DSL.
A logical terminal is any terminal that can communicate with the Meridian 1 over a DSL. It may
be directly connected to the DSL through its own physical termination or be indirectly connected
through a common physical termination.
The length of a DSL depends on the specific terminal configuration and the DSL wire gauge,
however, it should not exceed 1 km (3,280 ft).
The SILC interface uses a 4 conductor cable that provides a differential Transmit and Receive
pair for each DSL. The SILC has options to provide a total of 2 Watts of power on the Transmit
or Receive leads, or no power at all. When this power is supplied from the S/T interface, the
terminal devices must not draw more than the 2 Watts of power. Any power requirements
beyond this limit must be locally powered.
Other functions of the SILC are:
• support point-to-point and multi-point DSL terminal connections
• execute instructions received from the MISP to configure and control the S/T interfaces
• provide channel mapping between ISDN BRI format (2B+D) and Meridian 1 system bus
format
• multiplexes 4 D-channels onto one timeslot
• perform activation and deactivation of DSLs
• provide loopback control of DSLs
• provide a reference clock to the clock controller
The NT6D70 SILC Card provides eight S/T four-wire full-duplex polarity-sensitive interfaces to
connect ISDN BRI-compatible terminals over DSL to the CS 1000. Each S/T interface provides
two B-channels and one D-channel and supports a maximum of eight physical connections
that can link up to 20 logical terminals on one DSL.
306 Circuit Card Reference
Comments? infodev@avaya.com
July 2011