# Signal-transmission qualifier

Canonical URL: https://eloragrid.ai/symbols/iec-signal-transmission-qualifier
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: Q020504
Drawing use: Schematic
Reference families: IEC, Manufacturer

## Symbol convention

Convention: IEC
Form: Signal-transmission qualifier
Autodesk IEC-60617 Symbol Preview — Propagation and signal-flow qualifiers; vendor family reference, not certified IEC geometry or database identifier.

A transmission qualifier identifies the sending role of a signal interface.

## What it represents

A transmission qualifier identifies the sending role of a signal interface. Transmission identifies the source role of a signal relationship. It can be used beside a transducer, communications interface or other function whose output is conveyed elsewhere.
Identify the receiving function through a tag or cross-reference. Signal units and electrical interface details belong in the associated I/O or communications schedule.

## How to read it

- Label the signal and the connected receiving function.
- A transmitter-role indication does not identify the physical medium or electrical levels.

## Information to show or reference

- Identify the associated device, circuit or diagram boundary.
- Label the signal and the connected receiving function.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.

## Important distinction

A transmitter-role indication does not identify the physical medium or electrical levels.

## Facts

- Reference scope: Specific public IEC-context family form
- Publisher reference token: Q020504 (Autodesk token; not a verified IEC database ID)
- Information added: Label the signal and the connected receiving function.
- Preview: Independent educational concept; consult the publisher and applicable standard for the exact graphic

## Public references

- [Autodesk IEC-60617 preview: Propagation and signal-flow qualifiers](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-1C0C7AE2-F703-4283-BCB1-3E0B30882715.htm) — Autodesk. Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.