ITU-T I.130-1989 Method for the Characterization of Telecommunication Services Supported by an ISDN and Network Capabilities of an ISDN - Integrated Services Digital Network (ISDN) - General Structure and Service Capabilities (Study Group XVIII) 5 pp
Method for the Characterization of Telecommunication Services Supported by an ISDN and Network Capabilities of an ISDN - Integrated Services Digital Network (ISDN) - General Structure and Service Capabilities (Study Group XVIII) 5 pp
ITU-T I.130-1989 history
1989ITU-T I.130-1989 Method for the Characterization of Telecommunication Services Supported by an ISDN and Network Capabilities of an ISDN - Integrated Services Digital Network (ISDN) - General Structure and Service Capabilities (Study Group XVIII) 5 pp