04.08版本5.5.0由SMG#21创建，原因是:HSCSD CC零件的变更；多批次等级的指示；BC-IE中的压缩位；以PD为基础区分序列编号；UCS2字母表支持classmark中的指示；T3212的条件保持；V.120；关于MM连接建立的澄清；处理多个频率重新定义；IMM分配消息中的保留值；SI6；MM信息；在类标记处理中引入R带；VGCS/VBS单元选择的选项缩减；支持14.4kbit/s（与无线电接口相关）；编辑评论。5.6.0版主题删除通知类型2使用优先级的澄清IE信道模式修正确认消息描述ASCI MS从不知道组呼叫区在频带变化时处理类别标记信息v5之间旧网络不一致对承载能力的解释。 5和4.17删除7.2多频段移动设备类别标记信息服务编码的代码点

04.08 version 5.5.0 created at SMG#21 as a result of: Changes of CC parts for HSCSD; Indication of Multislot class; compression bit in BC-IE; Differentiation of sequence numbering on a PD basis; UCS2 alphabet support indication in the classmark; Condition Holding for T3212; V.120; Clarification on MM connection establishment; Handling of multiple frequency redefinitions; Reserved values in IMM Assignment message; SI6; MM info; Introduction of R band in classmark handling; Option reduction for VGCS/VBS cell selection; Support of 14.4 kbit/s (Radio interface related); editorial revisons. version 5.6.0 SUBJECT Deletion of Notification Type 2 Clarification of the usage of Priority level IE Correction of Channel mode modify acknowledge message description ASCI MS never knows the Group call area Handling of classmark information at band change Interpretation of Bearer Capability by an old network Inconsistency between v5.5 and 4.17 Deletion of code points for 7.2 service Coding of classmark information for multiband mobiles