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ITU-T J.128 (11/2005)

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Set-top gateway specification for transmission systems for interactive cable television services
The DOCSIS Set-top Gateway (DSG) specification introduces additional requirements on a DOCSIS Cable Modem Termination System and DOCSIS Cable Modem (Annex B/J.112 and ITU-T Rec. J.122) to support the configuration and transport of a class of service known as "Out-Of-Band (OOB) messaging" between a Set-top Controller (or application server) and the customer premises equipment (CPE). In general, the CPE is intended to be a digital set-top device, but may include other CPE devices, such as residential gateways or other electronic equipment.
Citation: https://handle.itu.int/11.1002/1000/8648
Series title: J series: Cable networks and transmission of television, sound programme and other multimedia signals
  J.110-J.129: Interactive systems for digital television distribution (DOCSIS first and second generations)
Approval date: 2005-11-29
Provisional name:J.dsg
Approval process:AAP
Status: Superseded
Maintenance responsibility: ITU-T Study Group 21
Further details: Patent statement(s)
Development history