Glossary
GL-16 July 2008 Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06
ONT Product Information Manual Edition 01 3FE 51892 AAAA TCZZA
RIP Routing Information Protocol
An interior gateway protocol defined by the IETF (RIPv1 - RFC 1058 and
RIPv2 - 2453) that specifies how routers exchange routing table information.
RIP is a routing protocol based on the distance vector algorithm. With RIP,
routers periodically exchange entire tables.
RJ-45 The RJ-45 is a single-line jack for digital transmission over ordinary phone
wire, either untwisted or twisted. It is the interface for Ethernet standards
10Base-T and 100Base-T.
RMON Remote Monitoring
RSTP Rapid Spanning Tree Protocol
RSTP is specified in IEEE802.1w. It replaces the spanning tree protocol
specified by IEEE 802.1d. RSTP is targeted at switched networks with
point-to-point interconnections, and allows for much quicker
reconfiguration time (approximately 1 s) by allowing a rapid change in port
roles.
RT Real Time
RTCP Real-Time Control Protocol
RTL Routine Task List
RTP Real-time Transport Protocol
RTU Remote Test Unit
RU Rack Unit
A rack unit is a unit of vertical space in a standard 19-inch equipment rack.
One RU is 1.75 in.
Rx Receive (Rx) is the downstream direction on the ONT side. Receive (Rx) is
the upstream direction on the LT side.
SCR Sustainable Cell Rate
SDH Synchronous Digital Hierarchy
SEC Secondary
SELV Safety Extra Low Voltage
A circuit which has no direct connection to a primary power source, but
derives its power from either a transformer, converter or equivalent isolation
device, or from a battery. It is designed and protected so that under normal
and single fault conditions, its voltages do not exceed a safe value.
SES Severely Errored Second
SFF Small Form Factor
A physically compact connector design that has been developed for use in
fiber optic systems. These connectors are about half the size of conventional
connectors.
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