Nortel Networks Circuit Card - Manual (Page 786)

Page 786 of 906 NTBK51 Downloadable D-channel Handler daughterboard
553-3001-211 Standard 3.00 August 2005
— DCH interface
— layer 3 preprocessor
— traffic reporting including link capacity
Physical description
The NTBK51 daughterboard interfaces with the system CPU and is mounted
on either the NTAK09 1.5 DTI/PRI card or the NTBK50 2 Mb PRI digital
trunk card.
You can install this card in:
• slots 1 through 9 in the main cabinet or slots 11-19, 21-29, 31-39, or
41-49 in the expansion cabinets
• slots 1 through 4 in the MG 1000S. The card is not supported in the
MG 1000S Expansion
The NTBK51 daughterboard, when installed on the NTAK09 digital trunk
card, is addressed in the same slot as the NTAK09.
One NTBK51 daughterboard is required for each PRI link.
LEDs are located on the faceplate of the NTAK09/NTBK50 card. The DCHI
LED is a dual-color (red/green). The LED is described in Table 255.
Table 255
Faceplate LED
State Definition
On (Red) NTBK51 is disabled.
On (Green) NTBK51 is enabled, but not necessarily
established.
Off NTBK51 is not equipped.