Cisco Systems 15454 SDH 3.3.1 E1-42 Card Functionality

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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter3 Electrical Cards
3.3.1 E1-42 Card Functionality
Figure3-2 E1-42 Faceplate and Block Diagram
3.3.1 E1-42 Card Functionality
Each E1-42 port features ITU-T G.703 compliant outputs and inputs supporting cable losses of up to
6 dB at 1024 kHz. The E1-42 card supports 1:3 protection. You can also provision the E1-42 card to
monitor line and frame errors in both directions.
The E1-42 card can function as a working or protect card in 1:3 protection schemes. If you use the
E1-42 card as a standard E-1 card, you can install the E1-42 card in Slots 1 to 4 and 14 to 17 on the
ONS 15454 SDH. If you use the card’s 1:3 functionality, you must install an E1-42 ca rd as the protect
card in Slot 3 (for bank A) or in Slot 15 (for bank B).
You can group and map E1-42 card traffic in VC-12 as per ITU-T G.707 to any other card in an
ONS 15454 SDH node. For performance-monitoring purposes, you can gather bidirectional E-1
frame-level information (for example, loss of frame, parity errors, or CRC errors).
Note The lowest level cross-connect with the XC10G card is STM-1. Lower level signals, such as E-1, DS-3,
or E-3, can be dropped. This might leave part of the bandwidth unused. The lowest level cross-con nect
with the XC-VXL-10G card and the XC-VXL-2.5G car d is VC-12 (2.048 Mbps).
6 * 7 Line
Interface
Units
FLASH
DRAM
Protection
Relay
Matrix
uP
134377
BTC
ASIC
B
a
c
k
p
l
a
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e
AU-4 to
2 * 21 E1
Mapper
AU-4 / STM-4
FAIL
ACT/STBY
SF
E1-42