Miranda NV8144 - Page 16

6 Rev 2.2 • 27 Mar 10
1. Introduction
Signal Rates and Flow
As an example, NV8576 has 8 crosspoint cards that each manage up to 288 × 288 signals and are
divided into 2 sets of 4, with each set of 4 fanning out and distributing 288 inputs (1–288 and 289–
576) to all 1152 outputs. In a fully loaded frame, inputs 1–288 on the left side of the frame (when
facing the front of the router) are forwarded to crosspoint cards 1, 2, 7 and 8. Inputs 289–576, situ-
ated on the right side of the frame, are forwarded to crosspoint cards 3, 4, 9 and 10. (See Figure 1-2
and Figure 1-3 on page 7.)
Figure 1-2. Example of NV8576 Inputs Signal Flow (Front View)
FAN
OUTPUTS
1144
INPUTS
1144
XPT (INPUTS 1288)
INPUT MONITOR
(8 cards)
OUTPUTS
289 432
(8 cards)
OUTPUTS
577720
(8 cards)
OUTPUTS
8651008
(8 cards)
OUTPUT MONITOR
(16 cards)
INPUTS
289 432
(16 cards)
OUTPUTS 1576 OUTPUTS 5771152
OUTPUTS
145 288
(8 cards)
INPUTS
145 288
(16 cards)
INPUTS
433 576
(16 cards)
(not used)
FAN
OUTPUTS
433 576
(8 cards)
OUTPUTS
721864
(8 cards)
OUTPUTS
100 9 1152
(8 cards)
INPUT MONITOR OUTPUT MONITOR
SEC. CONTROL PRIM. CONTROL
XPT (INPUTS 1288)
XPT (INPUTS 289576) XPT (INPUTS 289576)
XPT (INPUTS 1288) XPT (INPUTS 1288)
XPT (INPUTS 289576) XPT (INPUTS 289576)
REDUNDANT CROSSPOINT