Electrical Symbols — Delay Elements

The design elements library "Cable TV" contains 64 symbols of CATV network equipment.
"Cable television is a system of distributing television programs to subscribers via radio frequency (RF) signals transmitted through coaxial cables or light pulses through fiber-optic cables. This contrasts with traditional broadcast television (terrestrial television) in which the television signal is transmitted over the air by radio waves and received by a television antenna attached to the television. FM radio programming, high-speed Internet, telephone service, and similar non-television services may also be provided through these cables.
The abbreviation CATV is often used for cable television." [Cable television. Wikipedia]
Use the shapes library "Cable TV" to draw CATV system design floor plans, network topology diagrams, wiring diagrams and cabling layout schemes using the ConceptDraw PRO diagramming and vector drawing software.
The vector stencils library "Cable TV" is included in the Electric and Telecom Plans solution from the Building Plans area of ConceptDraw Solution Park.

The vector stencils library "Audio and video connectors" contains 94 symbols of audio and video connectors (TRS, TS, XLR, microphone, headphone, TOSLINK, DVI, VGA, DFP, S-Video, RCA, display port, HDMI, Thunderbolt, coaxial TV, F connector, MIDI) and device silhouettes.
Use these jacks and plugs clipart icons for drawing hook up diagrams.
"Audio connectors and video connectors are electrical connectors (or optical connectors) for carrying audio signal and video signal, of either analog or digital format. Analog A/ V connectors often use shielded cables to inhibit radio frequency interference (RFI) and noise." [Audio and video connector. Wikipedia]
"The existence of many different audio and video standards necessitates the definition of hardware interfaces, which define the physical characteristics of the connections between electrical equipment. This includes the types and numbers of wires required along with the strength and frequency of the signal. It also includes the physical design of the plugs and sockets.
An interface may define a connector that is used only by that interface (e.g., DVI) or may define a connector that is also used by another interface; for example, RCA connectors are defined both by the composite video and component video interfaces.
Audio connectors and video connectors are electrical connectors (or optical connectors) for carrying audio signal and video signal, of either analog or digital format. Analog A/ V connectors often use shielded cables to inhibit radio frequency interference (RFI) and noise.
Since both analog and digital signals are used with some styles of connectors, knowledge of the interface used is necessary for a successful transfer of signals. Some interface types use only a distinctive connector or family of connectors, to ensure compatibility. Especially with analog interfaces, physically interchangeable connectors may not carry compatible signals.
Some of these connectors, and other types of connectors, are also used at radio frequency (RF) to connect a radio or television receiver to an antenna or to a cable system..." [Audio and video interfaces and connectors. Wikipedia]
The clipart icons example "Design elements - Audio and video connectors" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Audio and Video Connectors solution from the Engineering area of ConceptDraw Solution Park.