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- 【Organization】ITU
- 【Document #】ITU-T M.721
SYSTEM AVAILABILITY INFORMATION POINT
- 【Date】1988/11/1
- 【Language】English
- 【Status】Active
- 【Organization】ITU
- 【Document #】ITU-T Q.21
SYSTEMS RECOMMENDED FOR OUT-BAND SIGNALLING
- 【Date】1988/11/1
- 【Language】English
- 【Status】Active
- 【Organization】ITU
- 【Document #】ITU-T SERIES E.800 SUPP 1
Table of the Erlang formula
- 【Date】1988/11/1
- 【Language】English
- 【Status】Active
- 【Organization】ITU
- 【Document #】ITU-T Q.23
TECHNICAL FEATURES OF PUSH-BUTTON TELEPHONE SETS
- 【Date】1988/11/1
- 【Language】English
- 【Status】Active
- 【Organization】ITU
- 【Document #】ITU-T R.20
TELEGRAPH MODEM FOR SUBSCRIBER LINES
- 【Date】1988/11/1
- 【Language】English
- 【Status】Active
- 【Organization】ITU
- 【Document #】ITU-T T.330
TELEMATIC ACCESS TO INTERPERSONAL MESSAGING SYSTEM
- 【Date】1988/11/1
- 【Language】English
- 【Status】Active
- 【Organization】ITU
- 【Document #】ITU-T I.241.1
Teleservices Supported by an ISDN: Telephony
- 【Date】1988/11/1
- 【Language】English
- 【Status】Active
- 【Organization】ITU
- 【Document #】ITU-T I.241.2
TELESERVICES SUPPORTED BY AN ISDN: TELETEX
- 【Date】1988/11/1
- 【Language】English
- 【Status】Active
- 【Organization】ITU
- 【Document #】ITU-T T.390
TELETEX REQUIREMENTS FOR INTERWORKING WITH THE TELEX SERVICE
- 【Date】1988/11/1
- 【Language】English
- 【Status】Active
- 【Organization】ITU
- 【Document #】ITU-T SERIES E.800 SUPP 5
Teletraffic implications for international switching and operational procedures resulting from a failure of a transmission facility
- 【Date】1988/11/1
- 【Language】English
- 【Status】Active