ITU-T G.803 Architecture of transport networks based on the synchronous digital hierarchy (SDH)
ITU-T Y.101 Global Information Infrastructure terminology: Terms and definitions
ITU-T E.651 Reference connections for traffic engineering of IP access networks
ITU-T G.828 Error performance parameters and objectives for international, constant bit-rate synchronous digital paths
ITU-T E.351 Routing of multimedia connections across TDM-, ATM- and IP-based networks
ITU-T E.460 Measurements and metrics for monitoring the performance of V.34 Group 3 Facsimile
ITU-T E.671 Post-selection delay in PSTN/ISDN networks using Internet telephony for a portion of the connection