Cisco XR 12000 Series Installation Manual page 49

The following SFP module options are available for a Gigabit Ethernet line card:
•
•
•
•
The SFP modules have LC connectors. Different SFP module options allow you to customize the
physical interfaces on the line card by using both types of modules on the same line card. The only
restriction is that each port must match the specifications on the other end of the cable (short or long
wavelength), and must not exceed the recommended cable length for reliable communication.
Fiber-optic transmission specifications identify two types of fiber: single-mode and multimode. The
maximum distance for single-mode installations is determined by the amount of light loss in the fiber
path. If your environment requires the light to travel close to the typical maximum distance, you should
use an optical time domain reflectometer (OTDR) to measure the power loss.
Table 13
Table 13 Gigabit Ethernet SFP Module Power Budget and Signal Requirements
SFP Transceiver
GLC-SX-MM Short wavelength
Multimode,
short haul
3
GLC-LH-SM Long wavelength
Single-mode,
long haul
4
GLC-LX-SM Single-mode,
long-reach
5
GLC-ZX-SM Single-mode,
extended-reach
1. dBm = decibels referenced to 1 milliwatt
2. nm = nanometer
3. Not valid for 4-Port Gigabit Ethernet ISE line card
4. 4-Port Gigabit Ethernet ISE line card only
5. 4-Port Gigabit Ethernet ISE line card only
Table 14
SFP Module
GLC-SX-MM
GLC-LH-SM
OL-7861-01
GLC-SX-MM—Short wavelength SFP module (850 nm nominal), for use in 1000BASE-SX links.
GLC-LH-SM—Long-haul or long-wavelength SFP module (1310 nm nominal), for use in
1000BASE-LX links.
GLC-LX-SM—Single-mode, long-reach
GLC-ZX-SM=—Single-mode, extended-reach (supported by 4-Port Gigabit Ethernet ISE line card
only)
describes the operating parameters for the supported SFP modules.
Power Transmit
Budget Power
7.5 dB –9.5 to -4 dBm
at 850 nm
8.0 dB –9.5 to –3 dBm
at 1310 nm
–11 to –3 dBm
8 dB
at 1310 nm
23 dB 0 to +5 dBm
at 1550 nm
Gigabit Ethernet Laser Optical Transceiver (SFP) Module Operating Parameters
Type
Short wavelength
(multimode short haul)
Long wavelength
(single-mode long
haul)
Receive
Power
1
–17 to 0 dBm
2
–19 to -3 dBm
–19 to –3 dBm
–23 to 0 dBm
Wavelength Cable
850 nm MMF 62.5/125 micron
MMF 50/125 micron
1310 nm SMF 9/125 micron
Cisco XR 12000 Series Router Ethernet Line Card Installation
Cabling and Specifications
Receive Typical Maximum
Sensitivity Distance
–17 dBm 984 feet (300 meters)
32,808 feet (10,000 meters)
–19 dBm
–23 dBm
Distance
722 feet (220 m)
1640 feet (500 m)
32,808 feet (10,000 m)
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