Ericsson RBS 2106 Reference Manual page 479

IMSI
INIT
INT
IOG
IOM
IR
IS
IWD
JTC
LAPD
LBO
LED
LLB
LNA
Local bus
Local mode
Local/Remote switch
LOF
Logical Channel
EN/LZT 720 0008 P2A
2001-11-28
International Mobile Subscriber Identity
Initial
Internal
Input/Output Group
Internal Operation and Maintenance bus
InfraRed
Interface Switch
InterWork Description
Joint Technical Committee
Link Access Procedures on D-channel
LAPD is the data link layer (layer 2)
protocol used for communication between
the BSC and the BTS on the Abis
interface.
Abis layer 2 is sometimes used
synonymously with LAPD.
Line Build Out
Light Emitting Diode
Line Loop Back
Low Noise Amplifier
The local bus offers communication
between a central main RU (DXU) and
distributed main RUs (TRU and ECU).
When the RU is in Local mode, it is not
communicating with the BSC.
A switch used by the operator to order the
RU to enter Local or Remote mode.
Loss Of Frame
A logical channel represents a specified
portion of the information carrying
capacity of a physical channel.
GSM defines two major categories of
logical channels:
TCHs Traffic CHannels, for speech or
user data
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