●●●●● ●●●● 多媒体通信业务 ●●0 ●●●● A1 Service definition Recommendation no AV. 100 General Av services Draft available AV. 101 Teleconference service F.701(F.710 in blue book AV.110 General principles for audiographic conference service F.710 AV.111 Audiographic conference service F.711 AV. 120 Videotelephony services-General F.720 AV. 121 Basic narrow band videophone service in the ISDN F.721 AV.122 Broadband videotelephony services F.722 AV 130 Videoconference service- General F.730 AV. 131 Videoconference services-General AV. 132 Broadband videoconference services F.732 AV. 140 Audiovisual interactive services-General F.740 AV.150 (Other AV services not yet defined) AV.160 (Audiovisual service applications) AV.161 Service oriented requirements for telewriting applications F.761(F.730 in blue book)7 ⚫ 视听多媒体业务的标准框架AV.XXX系列 多媒体通信业务