SONET
See “Synchronous Optical Network” (p. GL-28) for definition.
SONET wavelength service
The SONET wavelength service provides transport of SONET signals through the 1830
PSS-36/PSS-32/PSS-16/PSS-4 network.
span
A fiber link between NEs that can be unidirectional or bidirectional, depending on the network
design. Multiple segments in tandem are connected by glass-through connections.
span loss
Loss (in dB) of optical power due to the span transmission medium (includes fiber loss and splice
losses).
splice
A permanent connection of two optical fibers through fusion or mechanical means.
SRG
See “shared risk group” (p. GL-25) for definition.
SSH
See “secure shell” (p. GL-25) for definition.
SSMF
See “standard single-mode fiber” (p. GL-27) for definition.
ST
See “straight-tip connector” (p. GL-28) for definition.
standard single-mode fiber (SSMF)
This is the most common type of fiber deployed. This fiber was designed to provide zero
chromatic dispersion at 1310 nm, to support the early long-haul transmission systems operating at
this wavelength. It has a chromatic dispersion of at most 20 ps/(nm*km) in the 1550 nm
wavelength range and usually around 17 ps/(nm*km).
static filter, CWDM (SFC)
A static filter card used with a CWDM circuit pack.
static filter, DWDM (SFD)
A static filter card used with a DWDM circuit pack.
storage area network (SAN)
A high-speed special-purpose network (or subnetwork) that interconnects different kinds of data
storage devices with associated data servers on behalf of a larger network of users.
Glossary
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1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011
GL-27
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