A patch bay that provides (a) the first access of most local user digital circuits in a technical control facility and (b) patching, monitoring, and testing capabilities for both high-level and low-level digital circuits.

See software defined radio.

A digital representation of a 0-dBmO 1004-Hz analog sinusoid, such that it will be decoded into an analog signal equal in level to the analog signal obtained by decoding a digital milliwatt using the same decoder. [T1.508-1998]

A collection of technologies that technically enable the definition of and enforcement of secure content transportation as well as secure content licensing, including:

Protection and control of the viewing of content that is delivered over IP transport.
Rights management for the delivered content.

1. A synchronous system developed by the International Radio Consultative Committee (CCIR), used to establish contact with a station or group of stations automatically by means of radio. The operational and technical characteristics of this system are contained in CCIR Recommendation
49
3. [47CFR]
2. See selcall.

A replacement for the modem in synchronous connections to the Internet, and which formats data for transmission.

A signal in which discrete steps are used to represent information.
Note 1: In a digital signal, the discrete steps may be further characterized by signal elements, such as significant conditions, significant instants, and transitions.
Note 2: Digital signals contain m-ary significant conditions.

1. In T-carrier, a basic digital signaling rate of 64 kb/s, corresponding to the capacity of one voice-frequency-equivalent channel.
Note 1: The DS0 rate forms the basis for the North American digital multiplex transmission hierarchy.
Note 2: The DS0 rate may support twenty
2. 4-kb/s channels, or ten
4. 8-kb/s channels, or five
9. 67-kb/s channels, or one 56-kb/s channel,… (Read More →)

A digital signaling rate of
1. 544 Mb/s, corresponding to the North American and Japanese T1 designator.

A digital signaling rate of
3. 152 Mb/s, corresponding to the North American T1C designator.