Digital cellular telecommunications system (Phase 2+); General Packet Radio Service (GPRS); Serving GPRS Support Node (SGSN) - Visitors Location Register (VLR); Gs interface layer 3 specification

• 7.5.0
• 7.4.0
• 7.3.0
• 7.2.0
• 7.1.0
• 6.7.0
• 6.6.0
• 6.5.0
• 6.4.0
• 6.3.0
• 6.2.0
• 6.1.0