Micro Controller Unit (Mcu) - Avaya Nortel Communication Server 1000 Reference

A logical terminal is any terminal that can communicate with the CS 1000over 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).
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 include the following:
• 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 CS 1000 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

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 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.
The reset and sanity timer logic resets the MCU.
The serial control interface is an IPE bus used by the MPU to communicate with the S/T
transceivers.
The MCU coordinates and controls the operation of 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.
The reset and sanity timer logic resets the MCU.
The serial control interface is an IPE bus used by the MPU to communicate with the S/T
transceivers.
Circuit Card Reference
Functional description
July 2011 307