09年发布，v9.0.0已出，但3gpp网页出现错误，无法下载-Digital cellular telecommunications system (Phase 2+) Universal Mobile Telecommunications System (UMTS) LTE Global text telephony (GTT) Stage 1: Service descr iption (3GPP TS 22.226 version 8.0.0 Release

09年发布，包括UMTS协议，IMS的stage2-Digital cellular telecommunications system (Phase 2+) Universal Mobile Telecommunications System (UMTS) LTE IP Multimedia Subsystem (IMS) Stage 2 (3GPP TS 23.228 version 8.10.0 Release 8)