Andryan’s Random Notes

GERAN - GPRS EDGE Radio Access Network
UTRAN - UMTS Terrestrial Radio Access Network
UMTS - Universal Mobile Telecommunications System
SIGTRAN - SS7 Signaling over IP
GPRS - General Packet Radio Service (2.5G)
EDGE - Enhanced Data rates for GSM Evolution (2.75G)

PLMN - Public Land Mobile Network
PSTN - Public Switched Telephone Network

NSS - Network & Switching Subsystem
BSS - Base Station System
MSC - Mobile Switching Center
MSC-S/MSS - Mobile Switching Center Server (3G)
GMSC - Gateway MSC
IMS - IP Multimedia Subsystem
BSC - Base Station Controller
BTS - Base Transceiver Station
SGSN - Serving GPRS Supporting Node
GGSN - Gateway GPRS Supporting Node
VLR - Visitor Location Register
HLR - Home Location Register
AuC - Authentication Center
EIR - Equipment Identity Register
IN - Intelligent Network

Gb - Link between BSS and SGSN
Gn - Link between SGSN and other SGSNs and internal GGSN
Gp - Link between SGSN and external GGSN
Gr - Link between SGSN and HLR
Gi - Link between GGSN and PDN (Public Data Network)
Gd - Link between SGSN and SMS Gateway

A-Interface - Link between MSC and BSC
A-bis - Link between BSC and BTS
RNC - Radio Network Controller (BSC in UMTS world)
Node B - BTS in UMTS world
IuCS - Link between RNC and MSC (voice)
IuPS - Link between RNC and SGSN (data)
IuR - Link between RNC and RNC
IuB - Link between RNC and Node B

DDF - Digital Distribution Frame
ODF - Optical fiber Distribution Frame

More to come.. picture soon!