Alcatel-Lucent 1665 Installation Manual page 402

Ring
A configuration of nodes comprised of network elements connected in a circular fashion. Under normal
conditions, each node is interconnected with its neighbor and includes capacity for transmission in either
direction between adjacent nodes. Path switched rings use a head-end bridge and tail-end switch. Line
switched rings actively reroute traffic over a protection line.
Ring (0x1) Low-Speed Interface
Formerly referred to as dual 0x1 or single 0x1. In ring applications, the DMX 2.5G Multiplexer may use a
0x1 interface, meaning both fibers carry service, as opposed to a linear (1+1) low-speed interface where one
fiber is used for service and other for protection. See 1+1.
RPP - Reliability Prediction Procedure
Described in Telcordia Technologies TR-NWT-00032.
RT - Remote Terminal
An unstaffed equipment enclosure that may have a controlled or uncontrolled environment.
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S Self-Healing
Ring architecture in which two or more fibers are used to provide route diversity. Node failures only affect
traffic dropped at the failed node.
SEO - Single-Ended Operations
The maintenance capability that provides remote access to all DMX 2.5G Multiplexer systems from a single
location over the DCC.
Service Line
On a DMX 2.5G Multiplexer system, a service (or "working") line is a pair of fibers (one transmit and one
receive) that terminate on an OLIU circuit pack in the Main-1, A-1, B-1, C-1, or D-1 slots. As defined by
the SONET standard, the SONET APS channel is not defined on a service line. See Protection Line.
SES - Severely Errored Seconds
This performance monitoring parameter is a second in which a signal fail occurs, or more than a preset
amount of coding violations (dependent on the type of signal) occurs.
SF - Super Frame
The format for DS1 signals.
Small Form Pluggable (SFP)Optics
SFP optics are used on the LNW37/45/49/70/73/74 packs. SFP optics are "pluggable" optics. This means
that the circuit pack does not come equipped with optics. The customer orders the number and type of optics
required at the time of installation. Additional optics can be ordered as new services are required. Thus
DMX interface density is made scalable to meet the unique needs of each customer. The SFP optics also
allow for some versatility in the span lengths and rates that can be covered by the same pack. The SFP optics
adhere to Telcordia GR-253 and ITU G.957 standards.
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G L - 2 4 365-372-304R7.1
Issue 1, November 2007