{"id":"image-vnd-cns-inf2","mimeType":"image/vnd.cns.inf2","name":"Comverse Network Systems INF2 Image","shortName":"CNS-INF2","category":"Legacy \u0026 Proprietary","extensions":[".inf2"],"description":"The image/vnd.cns.inf2 MIME type represents a proprietary image format developed by Comverse Network Systems in the late 1990s. As a pioneer in voicemail, SMS, and early unified messaging architectures for telecommunications providers, Comverse used the INF2 format internally within its messaging infrastructure. Registered with IANA in 1999, the format is completely obsolete today and was never intended for general consumer use or web delivery.","seo":{"title":"image/vnd.cns.inf2 MIME Type | Developer Reference for CNS INF2","description":"Complete reference for the image/vnd.cns.inf2 MIME type: Comverse Network Systems history, legacy telecom messaging formats, and file detection.","faqs":[{"question":"What is an image/vnd.cns.inf2 file?","answer":"It is a proprietary, legacy image format used internally by Comverse Network Systems for early telecommunications unified messaging and mobile media servers in the late 1990s."},{"question":"Can I open an image/vnd.cns.inf2 file today?","answer":"No. It is a completely obsolete, internal telecom format. There is no modern web browser, operating system, or standard image viewer (like Photoshop or ImageMagick) that supports decoding it."},{"question":"Why does this format have an official IANA registration?","answer":"Comverse Network Systems officially registered the MIME type in April 1999 to ensure their proprietary telecom messaging servers could correctly negotiate and transmit these internal media files over standard IP networks without conflicts."}]},"index":{"compression":["Proprietary"],"browserSupport":{"score":1,"label":"None"},"commonUses":["Legacy Telecom Infrastructure","Historical Comverse Unified Messaging Systems","Proprietary Server-to-Server Media Exchange"]},"technical":{"magicBytes":{"hex":"Unknown (Proprietary)","ascii":"Unknown"},"container":"Proprietary Comverse Container","compressionAlgorithm":["Unknown (Proprietary Telecom Encoding)"],"colorDepth":["Unknown"],"transparency":false,"animation":false,"metadata":{"exif":false,"xmp":false,"iccProfile":false},"alphaChannel":false,"progressiveLoading":false,"hdrSupport":false},"history":{"developer":"Comverse Network Systems (Ann McLaughlin)","released":"1999","specification":"Proprietary (Registered with IANA on 1999-04-19)"},"browserSupport":{"chrome":false,"chromeVersion":"None","firefox":false,"firefoxVersion":"None","safari":false,"safariVersion":"None","edge":false,"edgeVersion":"None","internetExplorer":false},"softwareSupport":[{"name":"Legacy Comverse Messaging Servers","logo":""}],"conversion":{"convertTo":[],"convertFrom":[]},"developer":{"httpHeaders":[{"header":"Content-Type","value":"image/vnd.cns.inf2"}],"htmlAccept":"None","fileDetection":["Due to its obscurity and proprietary nature, standard file sniffers lack magic byte definitions for this format.","Identification relies entirely on the HTTP Content-Type header from legacy server logs or string matching the .inf2 extension against IANA MIME registries."]},"prosCons":{"pros":["Historically allowed Comverse to standardize media transmission internally across their global telecom messaging platforms"],"cons":["Completely obsolete and non-functional outside of decommissioned telecom infrastructure","Undocumented, closed-source binary structure","Zero support in modern image processing libraries like ImageMagick, libvips, or FFmpeg"]},"specifications":{"url":"https://www.iana.org/assignments/media-types/image/vnd.cns.inf2","rfc":"","mimeAliases":[]},"developerSnippets":{"python":"import magic\n# Libmagic does not contain definitions for this proprietary telecom format and will likely fall back to 'application/octet-stream'\nprint(magic.from_file('legacy_media.inf2', mime=True))","nodejs":"const mime = require('mime');\n// Many JS MIME libraries map .inf2 to image/vnd.cns.inf2 by default purely based on the historical IANA registry string match\nconsole.log(mime.getType('legacy_media.inf2')); // Likely outputs 'image/vnd.cns.inf2'","go":"import \"net/http\"\n// The standard net/http library cannot detect INF2 files internally via byte sniffing. You must rely on extension string matching.","php":"$mime = mime_content_type('legacy_media.inf2');\necho $mime; // Standard server environments will map this to application/octet-stream"},"relatedFormats":[]}