Functional Description; Microprocessors - Meridian Nortel 1 Option 11C Technical Reference Manual

Table 161
Faceplate LEDs
State
On (Red)
On (Green)
Off

Functional description

Microprocessors

NTBK51 Downloadable D-channel handler
LEDs are located on the faceplate of the NTAK09/NTBK50 card. The DCH
LED is a dual-color (red/green), with the states represented as follows:
Definition
NTBK51 is disabled.
NTBK51 is enabled, but not necessarily established
NTBK51 is not equipped.
The main functional blocks of the NTBK51 architecture include the
following:
• Microprocessors
• Main memory
• Shared memory
• EPROM memory
• Flash EPROM memory
• EEPROM memory
• Serial communication controller
• Sanity timer
• Bus timer
One microprocessor handles data transfer between each serial interface and
software, reports the status of each port and takes commands from software
to control the activities of the ports. A high performance MPU supports the
D-channel from the PRI card and other software applications running
simultaneously on other ports of the DDCH card.
Option 11C and 11C Mini
Page 521 of 544
Technical Reference Guide