{"schemaVersion":1,"slug":"iec-telephone-outlet","name":"Telephone outlet plan symbol","kind":"symbol","abbreviation":"TO","aliases":["telephone socket","voice outlet","telephone point"],"category":"installation-communications","drawingTypes":["GA"],"referenceFamilies":["IEC"],"summary":"Plan symbol for a telephone outlet where a voice service is terminated for a handset or device.","description":["Telephone outlets are drawn as a triangle or outlet shape tagged T or TP. In modern buildings, voice is usually carried on structured cabling, so the telephone outlet may simply be a data outlet assigned to voice, but legends still keep a separate mark for analogue lines, lift phones and alarm diallers.","Analogue lines remain common for lifts, emergency phones and some alarm communicators. The plan symbol tells the installer that a dedicated voice pair must reach this point. The symbol does not show whether the line is analogue, digital or VoIP."],"readingNotes":["Check whether a dedicated analogue line is required.","Match to the voice cabling schedule."],"drawingChecklist":["State line type.","Tag outlet ID.","Identify service provider demarcation."],"distinction":"A telephone set symbol represents the handset itself; the outlet is the wall termination.","facts":[{"label":"Service","value":"Voice line termination"},{"label":"Common dedicated uses","value":"Lifts, emergency phones, alarm diallers"},{"label":"Exact standard graphic","value":"Not reproduced here; confirm the form against IEC 60617 and the project legend"}],"references":[{"sourceId":"iec-diagrams","relevance":"IEC graphical symbol context for installation and communication plans; independently drawn here."},{"sourceId":"pub-object-engineering-design","relevance":"Installation design context for coordinating low-current systems with power and lighting."}],"related":["iec-data-outlet","iec-telephone-set-symbol","iec-firefighter-telephone-outlet-plan-symbol"],"artwork":"s28-iec-telephone-outlet","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Telecommunication outlet, telephone","reference":"IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier."},"plainEnglish":{"title":"What does Telephone outlet plan mean?","introduction":"Telephone outlets are drawn as a triangle or outlet shape tagged T or TP. In modern buildings, voice is usually carried on structured cabling, so the telephone outlet may simply be a data outlet assigned to voice, but legends still keep a separate mark for analogue lines, lift phones and alarm diallers.","example":"Analogue lines remain common for lifts, emergency phones and some alarm communicators. The plan symbol tells the installer that a dedicated voice pair must reach this point. The symbol does not show whether the line is analogue, digital or VoIP.","drawings":"Check whether a dedicated analogue line is required. Match to the voice cabling schedule. A telephone set symbol represents the handset itself; the outlet is the wall termination.","terms":[{"name":"Schematic","meaning":"A drawing showing function and connections rather than physical appearance."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"IEC graphical symbols for diagrams","url":"https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/"},{"label":"Electrical installation design methodology and references","url":"https://www.electrical-installation.org/enwiki/General_rules_of_electrical_installation_design"}],"detail":"Plan symbol for a telephone outlet where a voice service is terminated for a handset or device. A telephone set symbol represents the handset itself; the outlet is the wall termination.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/iec-telephone-outlet","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/iec-telephone-outlet.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"iec-diagrams","title":"IEC graphical symbols for diagrams","publisher":"IEC","url":"https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/","type":"standard","scope":"IEC 60617 and related symbol-design publications. Full database access requires a subscription.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"IEC graphical symbol context for installation and communication plans; independently drawn here."},{"id":"pub-object-engineering-design","title":"Electrical installation design methodology and references","publisher":"Schneider Electric — Electrical Installation Guide","url":"https://www.electrical-installation.org/enwiki/General_rules_of_electrical_installation_design","type":"manufacturer","scope":"Public design context. No universal working clearance, equipment dimension or project compliance conclusion is asserted.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Installation design context for coordinating low-current systems with power and lighting."}]}