"forwarding " CNS Standards List |
|
CNS 13883
2018 Edition Integrated services digital network call forwarding busy, call forwarding no reply and call forwarding unconditional supplementary service 整體服務數位網路–忙線時、未應答及無條件指定轉接增添服務 |
Find out:1Items | To Page of: First -Previous-Next -Last | 1 |