Interface
Physical
Characteristics Protocol
Application Layer Protocol
Standards
S1-MME/S6a/S10/S11/S3/SGs/S4/Sv
GE
IP/MAC
S1AP
Diameter
GTP-C (control plane)
SGsAP
3GPP TS 36.413
Diameter: RFC 3588
S6a: 3GPP TS 29.272
3GPP TS 29.274
3GPP TS 29.118
GTP-C:3GPP TS 23.216
Sv:3GPP TS 23.280
FE
Iu
RANAP
GTP-U (user plane)
3GPP TS 25.413
3GPP TS 29.060
STM-1
ATM
STM-4
Gn/Gp/Ga/X1-1/X2/X3
GTP
3GPP TS 32.251
IP over ATM (IPOA)
Gb
E1/T1
FR
GMM
3GPP TS 24.008
SS7/Gr/Gs
SS7
MAP
3GPP TS 29.002
O&M
IP