48.014: General Packet Radio Service (GPRS); Base Station System (BSS) - Serving GPRS Support Node (SGSN) interface; Gb interface Layer 1

Info Page @ 3GPP
Rel-13
v13.0.0
Rel-12
v12.0.0
Rel-11
v11.0.0
Rel-10
v10.0.0
Rel-9
v9.0.0
Rel-8
v8.0.0
Rel-7
v7.0.0
Rel-6
v6.0.0
Rel-5
v5.0.1
Rel-4
v4.0.0