Northern Telecom DMS-100 Series Maintenance Manual page 28

1-10 Maintenance overview
Figure 1-3
Example of a two-cabinet 128K ENET configuration
Magnetic
Alarm cross-
tape drive
connect
shelf
Maintenance
Trunk Module
(MTM)
FSP FSP
Input/output
controller
(IOC)
IOC
Filler
panel
Disk
drive unit
Input/output Trunk
equipment module
frame equipment
(IOE) frame
(TME)
DMS-100
Family equipment
Enhanced network operation
The basic building block of the ENET is a double buffering, 16K by 16K
time switch crosspoint card. All switch paths have a constant delay of
125 µs in all switched paths as a result of the double buffering.
Channels that enter through the peripheral interface paddleboard transport
between shelves on vertical buses. The buses offer the channels to all
crosspoint cards in that column and the mate column. The crosspoint card
takes incoming channels or channels that are not switched. The card selects
297-1001-591 Standard 04.03 March 1999
Frame supervisory
panel (FSP)
MS0
DMS-bus
MTM
MS1
CPU0
DMS-core
SLM0
Dual-plane
combined
core
(DPCC)
cabinet
FSP
ENET plane 0
shelf 0
shelf 1
shelf 2
CPU1
shelf 3
SLM1
ENET
DMS SuperNode
equipment
FSP
ENET plane 1
shelf 0
shelf 1
shelf 2
shelf 3
ENET