Specifications

4-86
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
OC48 ELR 200 GHz Cards
4.28 OC48 ELR 200 GHz Cards
Eighteen distinct OC48 ITU 200GHz dense wavelength division multiplexing (DWDM) cards provide
the ONS 15454 DWDM channel plan. Each OC-48 DWDM card provides one Telcordia-compliant,
GR-253 SONET OC-48 port. The port operates at 2.49 Gbps over a single-mode fiber span. The card
carries VT, concatenated, and non-concatenated payloads at STS-1, STS-3c, STS-6c, STS-12c, or
STS-48c signal levels. Figure 4-29 shows the OC48 ELR DWDM faceplate and a block diagram of the
card.
Figure 4-30 OC48 ELR 200 GHz faceplate and block diagram
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, 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, 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 any high-speed slot and provision the card as a drop or
span card in a two-fiber or four-fiber BLSR, UPSR, or in an ADM (linear) configuration. Each OC48
ELR DWDM card uses extended long reach optics operating individually within the ITU-T 200 GHz
grid. The OC48 DWDM cards are intended to be used in applications with long unregenerated spans of
up to 200 km (with mid-span amplification). These transmission distances are achieved through the use
uP bus
uP
Flash
RAM
BTC
ASIC
Optical
Transceiver
OC-48
Main SCI
Protect SCI
STS-48
61360
Mux/
Demux
B
a
c
k
p
l
a
n
e
FAIL
ACT/STBY
SF
TX
1
RX
OC48
ELR
1530.33