Abis Interface between Base Transceiver Station (BTS) and Base  Station Controller (BSC).
Abis Configuration Configuration of traffic channels (OMUSIG, TCH, TRXSIG) on Abis.
Abis Protection Scheme used to provide redundant Abis Traffic across a separate path to guard against possible link failure.
Automatic Connection Feature in 2G Flexi BTS Site Manager, which would allow the user to get connected to the BTS automatically once BTS Manager is launched. The parameters required for connection viz. the BTS IP Address, the port of connection and the Q1 address will be taken from the locally stored defaults. ‘Automatic Connection’ would be an optional feature that the user may enable or disable anytime.
   
BBU Battery Backup Unit. The Battery Backup Unit gives a power supply in case of a temporary mains power supply breakdown.
BCF Base Control Function
   
  Base Control function is a functional entity that handles common control functions e.g. main clock functions, external alarm handling, control signals and frequency hopping. There is no physical BCF unit in BTS, the functional BCF operates in the Master TRX memory.
Block/UnBlock This scenario (block) is typically used to change faulty unit. The command specifies the object to be blocked. When the command is received by the BTS from the BTS Manager then it first checks the availability of the object for which the command was sent. If available the ACK is sent to BTS Manager immediately  and if it is not available then NACK is sent to BTS Manager.  
   
  Unblock command message structure is similar to Block command message structure but with a parameter data specified as UNBLOCK.  Unblock command unblocks the object that was previously blocked from BTS Manager.  BTS sends ACK to BTS Manager to confirm the unblock operation when this command is sent from BTS Manager to BTS.
BTS Base Transceiver Station
Commissioning Commissioning is set of tasks performed to enable the BTS to be connected to the network. It includes operational tests and configuring of transmission equipment.
Commissioning Wizard  A comprehensive utility, which provides set of GUI screens to aid user to fill in parameters required for commissioning a BTS.
CRC Cyclic Redundancy Check, which is used to detect errors in data received over a transmission media.
Cross- Connection A path between the two termination points inside any network element.
DDU Dual Duplexer Module (ERxA). Dual Duplexer Module (ERxA). The Dual Duplexer Module and the Dual TRX Module (EXxA) create one Sector Module. At least one Dual Duplexer Module is needed per sector, depending on the configuration (concerns non-RTC configurations). The Dual Duplexer Module is always attached to the Dual TRX Module, which provides the Dual Duplexer Module with power and O&M link. Extension Dual TRX Modules are installed without the Dual Duplexer Module.
DFCA Dynamic Frequency and Channel Allocation.
DTRX Dual TRX Module / Dual Transceiver Module.
EasyWizard mode The mode of commissioning as like in EasyWizard where user selects a file and specifies only those parameters which were user specified in EasyWizard that is Site Specific information, Antenna Settings and Passive Units (BBU and other passive units).
Egress direction Traffic direction out of a network element. The traffic direction is to be determined with respect to one link termination point. If the termination point is connected, the egress direction for one termination point is the ingress direction for the other termination point and vice versa.
EIF1, EIF2 and EIF3 New names for the external Ethernet ports: EIF1 = FE1, EIF2 = FE2 and EIF3 = SFP
Export Abis Allocation Save Abis Allocation in a local File.
External Ethernet port Ethernet port of the integrated switch which allows to connect external equipment to the BTS like further switches or other endnodes. On the PWE unit these are the interfaces EIF1 (FE1), EIF2 (FE2), and EIF3 (SFP). EIF1 (FE1) and EIF2 (FE2) allow fast Ethernet 100BASE-T and EIF3 (SFP) port allows inserting SFP modules for optical gigabit Ethernet 1000BASE-SX and 1000BASE-LX.
FE Fast Ethernet. IEEE standard for high speed l00Mbps Ethernet
FIFA A plug in-unit with built in FIU 19E RRI and E1. Supports 16 asymmetric E1 interfaces.
FIEA A plug-in-unit that supports 8 E1 Asymmetric (75 ohm) interfaces
FIPA A plug-in-unit that supports 8 E1/T1 Symmetric (120 ohm for E1, 100 ohm for T1) interfaces
FIQA Field replaceable transmission sub-module (plug-in unit) of Flexi EDGE BTS, with 3 Ethernet and 4 symmetrical RJ48 E1T1 interfaces.  Ethernet interfaces are used for PseudoWire Emulation or from EP3 on also for bypassing other Ethernet traffic.
FIQB Field replaceable transmission sub-module (plug-in unit) of Flexi EDGE BTS, with 3 Ethernet and 4 symmetrical RJ48 E1T1 interfaces. Ethernet interfaces are used for PseudoWire Emulation or for bypassing other Ethernet traffic. This Flexi transmission interface supports Packet Abis over IP with SyncE and ToP.
FIYA Field replaceable transmission sub-module (plug-in unit) of Flexi EDGE, with 3 Ethernet and 4 asymmetrical (coaxial) E1 interfaces. Ethernet interfaces are used for PseudoWire Emulation or in from EP3 on also for bypassing other Ethernet traffic.
FIYB Field replaceable transmission sub-module (plug-in unit) of Flexi EDGE, with 3 Ethernet and 4 asymmetrical (coaxial) E1 interfaces. Ethernet interfaces are used for PseudoWire Emulation or for bypassing other Ethernet traffic. This Flexi transmission interface supports Packet Abis over IP with SyncE and ToP.
GE Gigabit Ethernet. IEEE standard for high speed l000Mbps Ethernet
GUI Graphical User Interface
Hardware View Graphical View displaying the status and state of hardware modules/units physically present within a 2G Flexi BTS Site Manager.
Help Browser Software, which displays Online Helps to the user. Examples of Help browsers: NED, JavaHelp, WebHelp, DynaText, and WinHelp.
HTML Hypertext Markup Language, subset of standard generalised markup language (SGML) used on the web
Ingress direction Traffic direction into a network element. The traffic direction is to determined with respect to one link termination point. If the termination point is connected, the egress direction for one termination point is the ingress direction for the other termination point and vice versa.
Internal Ethernet port Ethernet port of the integrated switch which has no externally accessible Ethernet interface. On the PWE unit the internal Ethernet port is connected to the PWE terminating device.
Import Abis Allocation Open locally saved Abis Allocation file.
LAPD Link Access Protocol on D – channel. Used on Abis links (OMUSIG and TRXSIGs) and on the BTS internal D-bus. The LAPD is a layer 2 protocol which is defined in CCITT Q.920/921. LAPD works in the Asynchronous Balanced Mode (ABM). This mode is totally balanced (i.e., no master/slave relationship). Each station may initialize, supervise, recover from errors, and send frames at any time.
LMP Local Management Port. BTS Manager communicate with BTS through an LMP cable.
Local Connection BTS Manager connected locally to Flexi EDGE BTS via an Ethernet wire. For establishing this kind of connectivity BTS Manager is co-located at the BTS site.
Local Mode A special BTS state which allows TRX tests to be run without the need for a BSC connection. The BTS will be placed in local mode if the Use Current command is given when the BTS is in “Waiting for LAPD” state
Logical View Graphical View displaying Logical Object details for all logical objects present within an Flexi EDGE BTS.
MAC address For Ethernet a globally unique 48 bit number assigned to every Ethernet end node or station.  
Monitoring Destination The Ethernet interface which is used for receiving this mirrored traffic is called monitoring destination.
Monitoring Source The Ethernet interface on which traffic shall be monitored is called Monitoring source.
NE Network Element.
NetAct This is the Nokia Siemens Networks&rsquos NMS suite which operator use for managing the GSM network.
NOLS Nokia Online Services, Web portal for e-commerce, technical support, documentation, etc.
Node Level The whole transmission unit
Offline Mode When BTS Manager is not connected to BTS.
Online Mode When BTS Manager is connected to BTS (locally or remotely).
O&M Link Refers to Abis O&M Link
PAoPSN Packet Abis over IP
PAoTDM Packet Abis over TDM
Pilot Bit A Bit used for choosing between the Protected and Protecting path of a Signal in case Protection feature is configured.
PILS Product Information and Learning Solutions
PIU Plug-in Unit
Pseudowire A mechanism that carries the essential elements of an emulated circuit from one PE to another PE over a PSN.
PWE Pseudowire Emulation defined e.g. in the PWE3 standardization group. For Flexi EDGE also used as generic term for the transmission sub-modules FIQx and FIYx.
Q1 Protection Scheme used to provide redundant Q1 Traffic across a separate path to guard against possible link failure.
Remote Connection BTS Manager connected remotely to Flexi EDGE BTS via NetAct and BSC. For establishing this kind of connectivity BTS Manager connects to NetAct server over LAN and via BSC communicates to Flexi EDGE BTS.
RTC Remote Tune Combiner (ECxx) Module
SCF Site Configuration File, XML based file used to exchange commission/configuration information between BTS Manager & BTS.
SCF Upload Sending the SCF from BTS to BTS Manager.
Sobriquet This is the connection name present in the GCS database.
STIRC Space-Time Interference Rejection Combining – interference rejection combining that uses space-time processing to handle co-channel interference from transmitters that support transmit diversity.
SW Compatibility The compatibility between 2G Flexi BTS Site Manager and Flexi Multiradio BTS is driven by the SW version in the BTS Manager-BTS interface. The SW version is embedded in the both the 2G Flexi BTS Site Manager as well as the O&M software inside BTS. These values of the SW version are compared during the initial handshake.
Synchronization Protection Scheme used to provide redundant Abis Clock across a separate path to guard against possible link failure.
ToolTip A ‘bubble Help’ coded in software, or alternatively written as Help and opened as a pop-up window of the Help browser
Transmission Configuration File This file contains all Transmission related parameters. (Transmission PIU properties, Abis allocation, LIF, Service Interface, Interface Loop, Synchronization)
Transmission Manager Transmission Manager manages E1 or E1/T1 transmission interfaces. Transmission cards are used to connect BTS with BSC and to other BTS.
Transmission Plug-in Unit Transmission Plug-in Unit. Following PIUs are available: FIFA, FIEA, FIPA, FIQA, FIYA, FIQB and FIYB
Undo Commissioning To uncommission the BTS wherein all commissioning related parameters are erased from flash of BTS. It is followed by a reset. Undo commissioning is of two types Keep traffic bypass and erase traffic bypass.
VLAN Virtual Local Area Network.
VSWR Voltage Standing Wave Ratio
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