NTAK93 D-channel Handler Interface daughterboard Page 753 of 894
Circuit Card Description and Installation
Faceplate LEDs
NTAK09 1.5 Mb PRI and NTBK50 2.0 MB PRI cards
LEDs are located on the faceplate of the NTAK09 and NTBK50 cards. The
DCHI LED is dual-color (red and green). The LEDs are described in
Table 243.
Power consumption
Power consumption is +5 V at 750 mA; +12 V at 5 mA; and –12 V at 5 mA.
Functional description
The main functional blocks of the NTAK93 architecture include the
following.
Microprocessors
One microprocessor does the following:
• handles data transfer between each pair of serial ports and software
• reports the status of each port
• takes commands from software to control the activities of the ports
The microprocessors also handle some D-channel data processing in DCHI
mode.
Table 243
Faceplate LEDs
State Definition
On (Red) NTAK93 is equipped and disabled.
On (Green) NTAK93 is equipped and enabled, but not necessarily
established.
Off NTAK93 is not equipped.