Power Requirements; Environment; Architecture - Nortel Enterprise 1000 Reference Manual

Power requirements

Environment

Architecture

Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide
Switch SW4 – Carrier Shield Grounding
This switch allows for the selective grounding of the Tx / Rx pairs of the
carrier cable. Closing the switch (down position) applies Frame Ground
(FGND) to the coaxial carrier cable shield, creating a 75 ohms unbalanced
configuration. This applies only to the NTBK05CA cable.
Table 45
Switch SW4
Switch
SW 4-1
SW 4-2
Note: The usual method is to ground the outer conductor of the receive
coaxial signal.
The NTAK79 obtains its power from the backplane, drawing maximums of
2 A on +5 V, 50 mA on +12 V and 50 mA on –12 V.
The NTAK79 meets all applicable Nortel Network's operating specifications.
The main functional blocks of the NTAK79 architecture include:
• DS-30X interface
• A07 signaling interface
• digital pad
• carrier interface
• CEPT transceiver
• SLIP control
• D-channel support interface
NTAK79 2.0 Mb PRI card
Down (On)
Rx – FGND
Tx – FGND
Page 173 of 236
Up (Off)
Rx – OPEN
Tx – OPEN