Oc48 Elr 200 Ghz Cards - Cisco ONS 15454 Reference Manual

4.13 4.13 OC48 ELR 200 GHz Cards

Figure 4-12
OC48
ELR
1530.33
FAIL
ACT/STBY
SF
TX
1
RX
Nine of the cards operate in the blue band with spacing of 200 GHz on the ITU grid (1530.33 nm,
1531.90 nm, 1533.47 nm, 1535.04 nm, 1536.61 nm, 1538.19 nm, 1539.77 nm, 1541.35 nm, and
1542.94 nm).
The other nine cards operate in the red band with spacing of 200 GHz on the ITU grid
(1547.72 nm, 1549.32 nm, 1550.92 nm, 1552.52 nm, 1554.13 nm, 1555.75 nm, 1557.36 nm,
1558.98 nm, and 1560.61 nm). These cards are also designed to interoperate with the Cisco ONS 15216
DWDM solution.
You can install the OC48 ELR 200 GHz cards in Slots 5, 6, 12, and 13, and provision the card as a drop
or span card in a two-fiber or four-fiber BLSR, path protection, or ADM (linear) configuration. Each
OC48 ELR 200 GHz card uses extended long-reach optics operating individually within the
ITU-T 200-GHz grid. The OC48 ELR 200 GHz cards are intended to be used in applications with long
unregenerated spans of up to 200 km (124 miles) (with mid-span amplification). These transmission
distances are achieved through the use of inexpensive optical amplifiers (flat gain amplifiers) such as
EDFAs. Using collocated amplification, distances up to 200 km (124 miles) can be achieved for a single
channel, 160 km (99 miles) for 8 channels.
Maximum system reach in filterless applications is 24 dB or approximately 80 km (50 miles) without
the use of optical amplifiers or regenerators. However, system reach also depends on the condition of the
facilities, the number of splices and connectors, and other performance-affecting factors. The
OC48 ELR DWDM cards feature wavelength stability of +/–0.25 nm. Each interface contains a
transmitter and receiver.
Cisco ONS 15454 Reference Manual, R7.0.1
4-28
OC48 ELR 200 GHz Faceplate and Block Diagram
OC-48
Optical
Transceiver
Flash
RAM
Mux/
Demux
STS-48
BTC
ASIC
Main SCI
uP bus
Protect SCI
uP
Chapter 4 Optical Cards
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