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About the PoS Modules
Two key applications for the PoS modules are: interconnecting metropolitan area
networks across the SONET network infrastructure, and interconnecting server
co-location network sites directly using SONET links.
In the first application, the metropolitan area network service provider can build service
network sites in various cities, then use PoS modules in a BlackDiamond 6800 series
switch to connect those cities to a carrier's SONET infrastructure.
In the second application, operators of server co-location networks can use PoS modules
in BlackDiamond 6800 series switches to create a SONET-based connection between
server co-location sites. The result is that their network is simpler to manage, and
problems can be isolated and resolved more expediently.
Extreme Networks offers the PoS module in the following configurations:
• P3cMi: four OC-3 multimode, short-reach optical interfaces
• P3cSi: four OC-3 single-mode, intermediate-reach optical interfaces
• P12cMi: two OC-12 multimode, short-reach optical interfaces
• P12cSi: two OC-12 single-mode, intermediate-reach optical interfaces
The "c" in the names of the modules indicates that the optical interfaces on
these modules operate in concatenated mode, which enables all the bandwidth
to be devoted to a single payload stream.
The P3cMi (multimode version) operates in the 1310 nanometer (nm) wavelength
window at a typical maximum cable distance of 2 kilometers (km) or 1.24 miles (mi).
The P12cMi (multimode version) also operates in the 1310 nanometer (nm) wavelength,
but at a typical maximum cable distance of 500 meters (m) or 0.31 (mi). The P3cSi and
P12cSi (single-mode versions) also operate in the 1310 nanometer (nm) wavelength
window, but at a typical maximum cable distance of 15 km or 9.32 (mi). All four
versions of the PoS module use industry-standard duplex SC optical fiber connectors.
Packet Over SONET Module Installation and User Guide
About the PoS Modules
1-3
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