Chapter - Cisco ONS 15454 EC1-12 Reference Manual

Chapter 3

Electrical Cards
An EC1-12 card can be 1:1 protected with another EC1-12 card but cannot protect more than one EC1-12
card. You must install the EC1-12 in an even-numbered slot to serve as a working card and in an
odd-numbered slot to serve as a protect card.
3.3.1 EC1-12 Slots and Connectors
You can install the EC1-12 card in Slots 1 to 6 or 12 to 17 (multispeed or high-speed card slot) on the
ONS 15454. Each EC1-12 interface features DSX-level (digital signal cross-connect frame) outputs
supporting distances up to 450 ft (137 m) depending on facility conditions. See "Electrical Card
Protection and the Backplane" section on page 4 for more information about electrical card slot
protection and restrictions.
3.3.2 EC1-12 Faceplate and Block Diagram
Figure 3-1 shows the EC1-12 faceplate and a block diagram of the card.
Figure 3-1
EC1
12
FAIL
ACT/STBY
SF
October 2003
EC1-12 Faceplate and Block Diagram
main STS1
STS-1
Line
Framer
Interface
Unit
protect STS1
STS-12/
12xSTS-1
Mux/Demux
x12
ASIC
Cisco ONS 15454 Reference Manual, R4.1.x and 4.5
EC1-12 Card
B
a
BTC
c
ASIC
k
p
l
a
n
e
3-3