A Comprehensive list of Telecom Interfaces

A comprehensive list of telecom interfaces depending upon the type of Node

Core Network-CS domain

Node-1   Node-2   Interface
MSC-Server VLR B
MSC-Server HLR C
HLR VLR D
MSC-Server MSC-server E
MSC-Server IP-SM-GW E
MSC-Server EIR F
VLR VLR G
HLR/HSS AuC H
GMSC-Server CS-MGW Mc
GMSC-Server MSC-Server Nc
CS-MGW CS-MGW Nb

Core Network – PS domain

Node-1   Node-2   Interface
SGSN HLR Gr
GGSN HLR Gc
SGSN EIR Gf
SGSN GGSN(same-plmn) Gn
SGSN GGSN(diff-plmn) Gp

Interface between CS and PS domains

Node-1   Node-2   Interface
MSC/VLR GGSN Gs
SGSN/IP-SM-GW SMS/GMSC Gd
MSC/VLR MME SGs
MSC MME/SGSN Sv

Interfaces in EPC

Node-1   Node-2   Interface
MME HSS S6a
SGSN HSS S6d
MME S-GW S11
MME MME S10
S-GW PDN-GW S5/S8
MME EIR S3
S-GW SGSN S4
S-GW UTRAN S12
NON-3GPP IP Access SGW/PGW S2a
PDN-GW/S-GW ePDG S2b
PDN-GW Ue S2c
PDN-GW 3GPP AAA Server/proxy S6b
Untrusted non-3GPP IP Access 3GPP AAA Server/proxy SWa
Trusted non-3GPP IP Access 3GPP AAA Server/proxy STa
3GPP AAA Server 3GPP AAA proxy SWd
ePDG 3GPP AAA Server/proxy SWm
ePDG Untrusted non-3GPP Access SWn
ePDG UE SWu
HSS 3GPP AAA Server SWx
UE ANDSF S14
HRDP AN MME S101
3GPP2 1xCS IWS MME S102
HSGW S-GW S103
UE CSG List Server Uh

RAN

Node-1   Node-2   Interface
BSC BTS Abis
RNC RNC IuR
RNC nodeb Iub
HNB HNB-GW Iu-h
eNodeB eNodeB X2

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