4000 Digital Series II Issue 2.1 Technical Manual
STA0381 Page 71
circuit and a common Output RAM. A block diagram is shown below. Note that the block diagram only
illustrates one router.
A sub-fitted version of this card is used in the smaller 4420 matrices. This card has one quarter of the
routing capacity of the fully fitted card.
Figure 66 - PDE 3601A - Block Diagram
For a description of the functioning of the LEDs on the card refer to the
4000 Installation Guide.