Nortel Networks Video Gaming Accessories 553-3001-211 Manual De Usuario
NT6D70 SILC Line card
Page 369 of 894
A logical terminal is any terminal that can communicate with the system over
a DSL. It can be directly connected to the DSL through its own physical
termination or be indirectly connected through a common physical
termination.
a DSL. It can 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).
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.
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
S/T interfaces
•
provide channel mapping between ISDN BRI format (2B+D) and system
bus format
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
Micro Controller Unit (MCU)
The Micro Controller Unit (MCU) coordinates and controls the operation of
the SILC. It has internal memory, a reset and sanity timer, and a serial control
interface.
the SILC. It has internal memory, a reset and sanity timer, and a serial control
interface.
The memory consists of 32 K of EPROM which contains the SILC operating
program and 8 K of RAM used to store interface selection and other functions
connected with call activities.
program and 8 K of RAM used to store interface selection and other functions
connected with call activities.