Nortel Networks Option 11C User Manual
Page 470 of 544
NTAK10 2.0 Mb DTI card
Power requirements
The 2MB DTI obtains its power from the backplane. It draws less than 2A on
+5V, 50mA on +15V and 50mA on -15V.
+5V, 50mA on +15V and 50mA on -15V.
Environment
The NTAK10 meets all applicable Nortel Networks operating specifications.
Architecture
The main functional blocks of the NTAK10 architecture include:
•
DS-30X interface
•
signaling interface
•
three microprocessors
•
digital pad.
•
Card-LAN interface.
•
carrier interface.
•
clock controller interface.
A description of each block follows.
DS-30X interface
The NTAK10 interfaces to one DS-30X bus which contains 32 byte-
interleaved timeslots operating at 2.56 Mb. Each timeslot contains 10 bits in
A10 message format, 8 are assigned to voice/data (64 Kbps), one to signaling
(8 Kbps), and one is a data valid bit (8 Kbps).
interleaved timeslots operating at 2.56 Mb. Each timeslot contains 10 bits in
A10 message format, 8 are assigned to voice/data (64 Kbps), one to signaling
(8 Kbps), and one is a data valid bit (8 Kbps).
Transmit data
To transmit data on the carrier, the incoming serial bit stream from the
NTAK02 circuit card is converted to 8-bit parallel bytes. The signaling bits
are extracted by the signaling interface circuitry.
NTAK02 circuit card is converted to 8-bit parallel bytes. The signaling bits
are extracted by the signaling interface circuitry.
Digital Pad: The parallel data is presented to the pad PROM. The PROM
contains pad values, idle code, and A/µ-law conversion. They can be set
independently for incoming and outgoing voice on a per channel basis. Four
conversion formats are provided: A-law to A-law, A-law to µ-law, µ-law to
A-law, µ-law to µ-law.
contains pad values, idle code, and A/µ-law conversion. They can be set
independently for incoming and outgoing voice on a per channel basis. Four
conversion formats are provided: A-law to A-law, A-law to µ-law, µ-law to
A-law, µ-law to µ-law.