Nortel Networks 1000 - Manual (Page 370)

370 NT6D70 SILC Line card
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 four-conductor cable that provides a differential
Transmit and Receive pair for each DSL. The SILC has options to provide
a total of two 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 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:
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.