Cisco ONS 15454 EC1-12 - Page 19

3-19
Cisco ONS 15454 Reference Manual, R4.1.x and 4.5
October 2003
Chapter 3 Electrical Cards
DS3XM-6 Card
Figure 3-8 DS3XM-6 Faceplate and Block Diagram
3.7.3 DS3XM-6 Hosted By XCVT
The DS3XM-6 card works in conjunction with the XCVT card. A single DS3XM-6 can demultiplex
(map down to a lower rate) six DS-3 signals into 168 VT1.5s that the XCVT card then manages and cross
connects. XCVT cards host a maximum of 336 bidirectional VT1.5s or two DS3XM-6 cards. In most
network configurations two DS3XM-6 cards are paired together as working and protect cards.
BTC
ASIC
6 x Line
Interface
Units
6 STS1 to
28 DS1
Mapper
FLASH
DC/DC
unit
DRAM
Mux/Demux ASIC
Protection
Relay
Matrix
6 STS-1 / STS-12
uP
6 x M13
Units
61351
Mapper unit
B
a
c
k
p
l
a
n
e
FAIL
ACT
SF
DS3XM
6
1345987