Stages 2 and 3 Description for the Q3 Interface - Customer Administration - Integrated Services Digital Network (ISDN) Basic and Primary Rate Access - Specifications of Signalling System No. 7 (Study Group 11) 71 pp
Stages 2 and 3 Description for the Q3 Interface - Customer Administration - Integrated Services Digital Network (ISDN) Basic and Primary Rate Access - Specifications of Signalling System No. 7 (Study Group 11) 71 pp