Physical Description - Nortel Circuit Card Installation Manual

Page 774 of 906

Physical description

553-3001-211 Standard 3.00
NTBK50 2.0 Mb PRI card
You can install this card in slots 1 through 4 in the MG 1000S. The card is not
supported in the MG 1000S Expansion.
Each MG 1000S that has a digital trunk must have a clock controller
clocked to an external reference clock.
Note: Clocking slips can occur between MG 1000S systems that are
clocked from different Central Offices (COs), if the COs are not
synchronized. The slips can degrade voice quality.
The NTBK50 uses a standard 9.5" by 12.5" multi-layer printed circuit board.
The faceplate is 7/8" wide and contains seven LEDs. See Figure 166 on
page 775.
August 2005
IMPORTANT!