Nortel Networks Circuit Card User Manual
NTAK10 2.0 Mb DTI card
Page 723 of 906
Power requirements
The 2MB DTI obtains its power from the backplane. It draws less than 2 A
on +5 V, 50 mA on +15 V and 50 mA on –15 V.
on +5 V, 50 mA on +15 V and 50 mA on –15 V.
Environment
The NTAK10 card meets all applicable Nortel operating specifications.
Functional description
The NTAK10 provides the following features and functions:
•
a clock controller that can be switched in as an option
•
software-selectable A/µlaw operation
•
software-selectable digital pads on a per channel basis
•
frame alignment and multiframe alignment detection
•
frame and multiframe pattern generation
•
CRC-4 transmission and reception (software selectable)
•
card status and alarm indication with faceplate-mounted LEDs
•
Periodic Pulse Metering (PPM) counting
•
outpulsing of digits on any of the ABCD bits
•
Card-LAN for maintenance communication
Flashing
(Green)
(Green)
The clock controller is switched on and locking onto the
primary reference.
primary reference.
Off
The clock controller is switched off.
Note: See “Clock controller interface” on
in this
chapter for more on tracking and free-run operation.
Table 234
NTAK10 LED states (Part 2 of 2)
NTAK10 LED states (Part 2 of 2)
LED
State
Definition