Optical Power Considerations; 10 Gbe Wan Module Optical Interoperability; 1000Base-X And 10Gbase-X Reach - Avaya 8800 Planning And Engineering

Optical power considerations

When you connect the switch to collocated equipment, such as the OPTera Metro 5200, ensure
that enough optical attenuation exists to avoid overloading the receivers of each device.
Typically, this is approximately three to five decibels (dB). However, you do not have to
attenuate the signal when using the 10GE WAN module in an optically-protected configuration
with two OM5200 10G transponders. In such a configuration, use an optical splitter that
provides a few dB of loss. Do not attenuate the signal to less than the receiver sensitivity of
the OM5200 10G transponder (approximately –11 dBm). Other WAN equipment, such as the
Cross Connect DX and the Long Haul 1600G, have transmitters that allow you to change the
transmitter power level. By default, they are typically set to –10 dBm, thus requiring no
additional receiver attenuation for the 10GE WAN module. For specifications for the 10 GbE
modules, see Avaya Ethernet Routing Switch 8800/8600 Installation — Ethernet Modules,
NN46205-304.

10 GbE WAN module optical interoperability

Although the 10 GbE WAN module uses a 1310 nanometer (nm) transmitter, it uses a wideband
receiver that allows it to interwork with products using 1550 nm 10 Gigabit interfaces. Such
products include the Cross Connect DX and the Long Haul 1600G. The Avaya OM5200 10G
optical transponder utilizes a 1310 nm client-side transmitter.

1000BASE-X and 10GBASE-X reach

Various SFP (1 Gbit/s), XFP (10 Gbit/s), and GBIC (1 Gbit/s) transceivers can be used to attain
different line rates and reaches. The following table shows typical reach attainable with optical
devices. To calculate the reach for your particular fiber link, see
budget on page 45.
For more information about these devices, including compatible fiber type, see Avaya Ethernet
Routing Switch 8800/8600 Installation — SFP, XFP, GBIC, and OADM Hardware Components,
NN46205-503.
Table 6: Optical devices and maximum reach
SFP/XFP/GBIC
1000BASE-SX
1000BASE-LRM
1000BASE-LX
1000BASE-BX
Planning and Engineering — Network Design
Maximum reach
Up to 300 m
Up to 220 m
Up to 10 km
Up to 40 km over one fiber
Optical device guidelines
Reach and optical link
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