ITU-T E.131-1993
补充电话业务用户控制程序
Subscriber Control Procedures for Supplementary Telephone Services
- 标准号
- ITU-T E.131-1993
- 发布日期
- 1993年01月01日
- 实施日期
- 废止日期
- 无
- 中国标准分类号
- M40
- 发布单位
- IX-ITU
- 引用标准
- ITU-T E.131 ITU-T E.161
- 被代替标准
- ITU-T E.131-1988
- 适用范围
- Many Administrations are planning to introduce supplementary telephone services which are likely to be viable only if controlled by the user (a list of possible supplementary telephone services is given in Supplement No. 1 at the end of this fascicle). It is therefore necessary to consider means of providing users with procedures by which such control can be achieved. The purpose of this Recommendation is to prevent an undesirable proliferation, in various countries, of subscriber control procedures for such services. Descriptions are given below of three control procedures schemes now in use or in various stages of evolution. Guidelines are offered to Administrations planning to offer subscriber controlled supplementary services. Reference is made to Annex A for a glossary of terms used in this Recommendation.