| Oracle® Communications Glossary F12286 |
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L2
Layer 2
Layer 2 is the data link layer in the Open Systems Interconnection (OSI) model, a seven layer model used to describe and develop networking protocols.
L3
Layer 3
Layer 3 is the routing layer in the Open Systems Interconnection (OSI) model, a seven layer model used to describe and develop networking protocols.
L3 switching
Layer 3 (L3) functionality performed within the silicon of the switch to route IP packets between VLANs.
L3T
Level Three Timer
L486
LIM-486
LA
Limited Availability
Large Account
LAC
Location Area Code
LAI
Location Area Information
LAN
Local Area Network
A private data network in which serial transmission is used for direct data communication among data stations located in the same proximate location. LAN uses coax cable, twisted pair, or multimode fiber. See also STP LAN.
LAPD
Link Access Procedure on the D Channel
LATA
Local Access Transport Area
Latched USB Port
On the E5-MCAP card, a USB port with a lockable latch. Used with removable media (flash memory ”thumb” drives) to install and back up customer data.
Latency
Delays in processing network data.
Lawful Interception Gateway
See LIG
LB
Load Balancing
LBA
Logical Block Access
LBP
Loopback Point
See also Far-End Loopback Point.
LC
Logical Channel
A virtual circuit or a connection used by the X.25 network. There are two types of logical channels used in the X.25 network, PVCs (permanent virtual circuits) and SVCs (switched virtual circuits). A PVC is a direct connection to an X.25 node. The EAGLE uses two types of SVCs, an automatic switched virtual circuit (SVCA) and a remote switched virtual circuit (SVCR). An SVCA is a connection to an X.25 node established by the EAGLE as soon as the LIM initializes. An SVCR is a connection to an X.25 node established by the far end X.25 user.
LC2NM
Logical Channel to Network Management
A function of the SS7/X.25 gateway feature that allows SS7 network management to reroute traffic destined for failed X.25 logical channels to an alternate route, and reroutes traffic back to the original X.25 logical channels when the X.25 logical channels are back in service.
LCA
Logic Cell Array
LCD
Liquid Crystal Display
LCDR
Logica-compatible CDR format
LCS
Location Based Services
LDAP
Lightweight Directory Access Protocol
A protocol for providing and receiving directory information in a TCP/IP network.
LDD
Long Distance Division
LEA
Law Enforcement Agency
Leading Digits
The first one or more digits of the CdPN of an IAM message, used as the digit string (DS) key to access the IAM filter list.
Least-Cost Routing
Least-cost routing is a type of routing whereby priorities are assigned to routes so that messages can be sent at the lowest possible cost. Messages are sent via the route with highest priority (least-cost) based on the availability of the route at the time the message is being processed. If the least-cost route is unavailable, the route with the next highest priority is used, and so on. If two or more routes are given equal cost, traffic is distributed equally among the equal-cost routes.
LEC
Local Exchange Carriers
LED
Light Emitting Diode
An electrical device that glows a particular color when a specified voltage is applied to it.
LEMF
Law Enforcement Monitoring Facility
Level 2 Timers
The MTP level 2 timers that control the operation of signaling links.
Level 3 Timers
The MTP level 3 timers that control the operation of link sets.
LFM
Linear Feet per Minute
LFS
Link Fault Sectionalization
A feature in the EAGLE that allows the maintenance personnel to perform a series of far end loopback tests, from the EAGLE and identify faulty segments of an SS7 transmission path up to and including the remote network element.
LFU
Link Forced Uninhibit (Msg)
LG
Load Generator
LGP
Log Processor
Collects and processes data for the Log Viewer to display.
LGV
Log Viewer
Logs information about Tekelec Mobile Messaging operations and displays it in the Manager.
LI
Lawful Intercept
Length Indicator
LIA
Link Interface Appliqué
Location Information Answer (Diameter Cx)
LIDB
Line Information Database
Lifecycle Management
Set of functions required to manage the instantiation, maintenance and termination of a VNF or network service. (ETSI)
LIG
Lawful Interception Gateway
Provides signaling and media interworking between the IMS and a Law Enforcement Agency’s (LEA’s) Law Enforcement Monitoring Facility (LEMF) for the delivery of Intercept-Related Information (IRI) and Content of Communications (CC).
Light Emitting Diode (LED)
See LED
Lightweight Directory Access Protocol
See LDAP
LIIC
Link Interface and IMT Controller
LIM
Link Interface Module
Provides access to remote SS7, IP, and other network elements such as a Signaling Control Point (SCP) through a variety of signaling interfaces (DS0, MPL, E1/T1 MIM, LIM-ATM, E1-ATM, IPLIMx, IPGWx). The LIMs consist of a main assembly and possibly, an interface appliqué board. These appliqués provide level one and some level two functionality on SS7 signaling links.
LIM-AINF
A link interface module (LIM) with the AINF interface.
LIM-ATM
A link interface module (LIM) with the ATM interface.
LIM-DS0
A link interface module (LIM) with the DS0A Appliqué.
LIM-E1
A link interface module (LIM) with the E1 Appliqué.
LIM-OCU
A link interface module (LIM) with the OCU Appliqué.
LIM-T1
A link interface module (LIM) with the T1 Appliqué.
LIM-V.35
A link interface module (LIM) with the V.35 interface.
Link
Signaling Link
Carries signaling within a Link Set using a specific Association. A Link can belong to only one Link Set and one Association. There is generally one Link per Association in a Link Set.
Link Fault Sectionalization (LFS)
See LFS
Linking AVP
An AVP that is an output of a routing task. It serves as input to another routing task, to chain the two tasks.
Link Interface Module (LIM)
See LIM
Link Redundancy
Offers the ability of a hot standby link (or channel). During the normal operation, one link/channel will be operational which handles all the traffic. A second link/channel will be designated as the standby. When the primary link/channel goes down or administratively shuts down, the standby link/channel will become live and start handling the traffic.
Link Set (LS)
See LS
Link Set Configuration Set
A Link Set Configuration Set contains groupings of common link set parameters. The Link Sets Configuration Sets page provides a default Link Set Configuration Set and lets you provision additional configuration sets. The Link Set Configuration Sets is then associated with a link set on the Link Sets page.
Link Set Name (LSN)
See LSN
LIR
Location Information Request (Diameter Cx)
LISP
Lawful Intercept System Process
LMS
Link Monitoring System
LKA
Linked Array Utilities
LLI
Logical Link Identifier
LLSC
Link LinkSet Control
LLT
Latching LFS Test
LM
Layer Management
LM3U
Local MTP3 User
Uniquely defines, with the longest possible message parameter match, an MTP3 User in a Local Signaling Point. The LMU references an LSP, and has an SS7 Domain, a primary point code, and possibly, a capability point code. The LMU specifies a Service Indicator (SI) and may have additional parameters if the SI is SCCP.
LMU
Local MTP3 User
Uniquely defines, with the longest possible message parameter match, an MTP3 User in a Local Signaling Point. The LMU references an LSP, and has an SS7 Domain, a primary point code, and possibly, a capability point code. The LMU specifies a Service Indicator (SI) and may have additional parameters if the SI is SCCP.
LNA
Load Notification Answer
DRMA protocol messages sent between Policy Management systems.
LNKD
Link Level Hardware Driver
LNP
Local Number Portability
The ability of subscribers to switch local or wireless carriers and still retain the same phone number.
LNPA
Local Number Portability Audit
LNP MR
LNP Message Relay
LNPMR
LNP Message Relay
LNP QS
LNP Query Service function
LNPQS
LNP Query Service
LNP SMS
LNP Short Message Service
LNP Subsystem Application
The subsystem of the EAGLE assigned to the LNP feature.
LNP Translation Type
The translation type used by the global title translation table that determines the routing to an LNP database.
LNR
Load Notification Request
DRMA protocol messages sent between Policy Management systems.
Load Sharing
A type of routing used by global title translation to route MSUs This type of routing is used when a second point code and subsystem is defined for the primary point code and subsystem. Traffic is shared equally between the replicated point codes and subsystems.
Load Shedding
A method of temporarily reducing the offered load when the demand becomes greater than the ability of the system to handle it.
LOC
The primary function of the LOC server is to locate subscribers on GSM and IS-41 networks.
Local Area Network (LAN)
See LAN
Local MTP3 User
See LMU or LM3U
Local Node
A local Diameter node specified with a fully qualified domain name. It identifies a list of IP addresses for the Local node, a listen port number, supported transport types, and so on.
Local Number Portability (LNP)
See LNP
Local Realm
The administrative domain providing services to a user.
Local Service Management System (LSMS)
See LSMS
Local Signaling Point
See LSP
Location Candidate List
Defines, for a Diameter connection, the legitimate list of DA-MPs that are allowed to establish the TCP or SCTP connection.
Location Request Message (LOCREQ)
See LOCREQ
Location Routing Number (LRN)
See LRN
LOCREQ
Location Request Message
A TDMA/CDMA MSC query to an HLR for retrieving subscription/location information about a subscriber to terminate a voice call.
LOE
Level of Effort
Logical Channel (LC)
See LC
Logical Channel to Network Management (LC2NM)
See LC2NM
Logical Channel to Network Mapping (LC2NMX)
A feature of the SS7/X.25 gateway feature that allows SS7 network management to reroute traffic destined for failed X.25 logical channels to an alternate route, and reroutes traffic back to the original X.25 logical channels when the X.25 logical channels are back in service.
LOM
Lights Out Management
LPA
Loopback Acknowledgment
LPE
Logical Processing Element
LPO
Link Processor Outage
LPUI
Local Provisioning User Interface
LRF
Location Routing Function
LRN
Location Routing Number
A 10-digit number in a database called a Service Control Point (SCP) that identifies a switching port for a local telephone exchange. LRN is a technique for providing Local Number Portability.
LRNQT
ITU TCAP LRN Query Service
A feature that provides support for an ITU TCAP LRN query/response using the LRN method in order to support Number Portability.
LS
Link Set
A group of signaling links carrying traffic to the same signaling point. Represents a logical signaling connection from one HLR Router point code to one adjacent point code.
LSA
Licensed Service Area
Load Subscription Answer. DRMA protocol messages sent between Policy Management systems.
LSB
Least Significant Bit
LSF
Logical Service Function
User-defined network elements used in TekSIMPL. An LSF is a grouping of one or more network elements that provide the same service function (for example, a switching function or a specific service such as Prepaid service) and support the same Application Protocol.
LSI
Large Scale Integration
LSL
Low-speed Link
The low-speed signaling data link is a full-duplex, digital transmission channel operating at 64 or 56 kbps. The packets carried using this protocol are variable length and carried down a single clear channel link. This means that the link must be dedicated to the SS7 traffic and cannot be used to carry any other data.
LSMS
Local Service Management System
An interface between the Number Portability Administration Center (NPAC) and the LNP service databases. The LSMS receives LNP data from the NPAC and downloads that data to the service databases. LNP data can be entered into the LSMS database. The data can then be downloaded to the LNP service databases and to the NPAC.
LSN
Link Set Name
The name of the link set.
LSOA
Local Service Order Administration
LSP
Local Signaling Point
A logical element representing an SS7 Signaling Point. The Local Signaling Point assigns a unique primary/true point code within a particular SS7 Domain to an MP server.
LSR
Load Subscription Request
DRMA protocol messages sent between Policy Management systems.
LSS
Local Subsystem
LSSU
Link Status Signaling Unit
LST
Link Set Type
LSU
Local SCCP User
Refers to an Application Configured with a Subsystem Number to handle “rt-on-ssn” traffic for local signaling point code hosted on MP server.
LTE
Long Term Evolution
The next-generation network beyond 3G. In addition to enabling fixed to mobile migrations of Internet applications such as Voice over IP (VoIP), video streaming, music downloading, mobile TV, and many others, LTE networks will also provide the capacity to support an explosion in demand for connectivity from a new generation of consumer devices tailored to those new mobile applications.
LUDT
Long User Data
LUDTS
Long User Data Services
LUN
Logical Unit Number
An integer that refers to a Volume accessible to a host.
