Cisco XR 12000 Series Installation Manual page 45

Table 10
GBIC Module/
Connector
WS-G5487=
SC connector
CWDM-GBIC-x
3
xxx=
1. These distances represent best case conditions, depending on fiber quality, dispersion, and losses due to connectors, nodes,
or splices. In the case of the CWDM GBICs, CWDM OADM modules or mux/demux modules are needed for these GBICs to
work in any topology other than a point-to-point topology within one building, so the maximum distance is determined by an
optical power budget calculation that takes into consideration all sources of loss, including the insertion loss due to the
CWDM OADM and mux/demux modules, and might be different from the distance shown in the table. For optical parameter
information associated with the CWDM OADM and mux/demux modules, see the
on page
2. Dispersion-shifted single-mode fiber-optic cable required for 100,000-meter distance.
3. Supported by 3-Port Gigabit Ethernet modules
4. The wavelengths of the CWDM GBICs are based on a 20-nanometer (nm) wavelength grid and are available in eight
wavelengths: 1470, 1490, 1510, 1530, 1550, 1570, 1590, and 1610 nm.
1000BASE-SX and 1000BASE-LX (LH) were originally part of the IEEE 802.3z standard, which has
Note
been incorporated into the IEEE 802.3 standard.
Use only GBIC modules supplied by Cisco with your Ethernet line card. They have been tested by Cisco
Note
Engineering and, in some cases, a Cisco-supplied GBIC might contain an internal erasable
programmable read-only memory (EPROM) that identifies the GBIC to the Cisco IOS software.
The maximum distance for any fiber span in an optical network is determined by the fiber type and
quality, as well as the span length, number of splices, and number of optical nodes in the path. If your
network design requires the signal to travel close to the theoretical maximum distance (as listed in
Table
network topology to ensure it is within the specifications of the GBIC option in use.
Actual power budget calculations involve a number of variables specific to network topology and design,
Note
and are therefore outside the scope of this publication.
Table 11
GBIC
WS-G5484=
WS-G5486=
WS-G5487=
CWDM-GBIC-xxxx=
1. These distances represent best case conditions, depending on fiber quality, dispersion, and losses due to connectors, nodes,
or splices.
OL-7861-01
Ethernet GBIC Laser Optic Parameters (continued)
Type
Extended distance (single-mode)
Longwave (single-mode)
47.
11), you must calculate the optical power budget and receive (RX) sensitivity for the entire
Optical Parameter Values for Calculating Link Power Budget
Transmit
Power
–9.5dBm to 0 dBm
–11 to –3 dBm
0 to +5 dBm
+1 to +5 dBm
Wavelength Fiber Type
1550 nm 10/9 micron SMF
8 micron SMF
1470-1610 SMF 10/9 micron
4
nm
Receive Receive
Power Sensitivity
2
–17 to 0 dBm –17 dBm
–19 to –3 dBm –19 dBm
–23 to 0 dBm –23 dBm
–31 to –7 dBm –31 dBm
Cisco XR 12000 Series Router Ethernet Line Card Installation
Cabling and Specifications
1
Distance
43.5 miles (70 km)
2
62 miles (100 km)
62 miles (100 km)
"Related CWDM Documentation" section
Link
Budget Maximum Distance
7.5 dB 1,804 feet (550 m)
8 dB 6.2 miles (10 km)
23 dB 43.5 to 62 miles (70 to
3
100 km )
32 dB 62 miles (100 km)
1
4
45