Fax Glossary: Learn the Terms

Fax Dialing Shortcuts: What Are They?

How speed-dial buttons on old fax hardware became saved Contacts and Groups you can fax from any device.

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Fax Account, Storage & Job Queue

Where your sent and received faxes are actually stored, and how the job queue tracks a fax still being sent.

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Fax Groups and Compatibility: What They Mean

The ITU-T Group 1 through 4 fax classifications, and why nearly every fax device still relies on Group 3.

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ITU-T Fax Standards: What Do They Cover?

How T.30, T.37, T.4, and V.34 divide up the work of a fax transmission.

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Fax Compression Methods: MH, MR & MMR

What MH, MR, and MMR each do differently when compressing a scanned fax page for transmission.

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CSID vs TSID: Explained

The two identification fields the fax standard uses for the sending and receiving machine.

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Fax Modem Classes: What Are They?

What Class 1 and Class 2 fax modems actually controlled, and why cloud faxing skips modem hardware entirely.

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Fax Cover Sheet Fields: What They Mean

The standard To, From, Re, and CC fields on a fax cover sheet, and how Fax.Plus fills them in automatically.

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Transmission Verification Report: Explained

The paper proof a fax machine prints after sending, and Fax.Plus's digital version of that same confirmation.

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Transmission: How a Fax Actually Sends

What happens during a fax send, and the difference between automatic, batch, delayed, and real-time modes.

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Tone Dialing (DTMF): What Is It?

The keypad tones behind touch-tone dialing, and why they're not the same tones a fax connection uses.

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TIFF: File Format Explained

What TIFF is, and how it differs from the fax compression standards used to actually transmit a page.

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Telefax: Full Meaning & Definition

The regional naming variant of fax, and where it shows up instead of the word fax itself.

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T.38: What Does It Mean?

The ITU-T standard that carries a fax transmission over VoIP in real time instead of a phone line.

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Station ID: Full Meaning

The sender details printed on every fax page, and how Fax.Plus lets you customize them.

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Secure Fax: What Is It?

The specific safeguards behind a secure fax service, and why they matter for sensitive documents.

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Scanning: Full Explanation

The digitizing step every paper document goes through before it can be faxed online.

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Routing Administrator: In Fax Systems

Who configures call and fax routing on a larger system, and who fills that role on Fax.Plus.

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Resolution: Fax Quality Explained

How dpi tiers like Fine and Super Fine change fax sharpness and speed.

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PSTN: What Does It Mean?

The switched network behind every landline and POTS-line call, including fax.

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POTS Line: What Is It?

The analog phone service landlines and legacy fax machines run on, explained plainly.

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Number Porting: How It Works

How transferring an existing number into Fax.Plus works, and how long the process typically takes.

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OCR (Optical Character Recognition): Explained

What OCR does to a scanned page, and how Fax.Plus's AI approach to reading a fax differs from it.

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Network Scanner: Definition

The scanning hardware that sends files straight to a shared network location, no computer required.

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Landline: What Is It?

The wired phone line traditional fax machines dial out on, and why Fax.Plus doesn't need one.

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JBIG: Compression Standard Explained

What the JBIG compression standard improves on compared to the older MH, MR, and MMR fax methods.

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ITU: What This UN Agency Standardizes

The UN body that writes the technical rules behind global fax standards.

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ISDN: What Does It Mean?

A digital phone-line standard from before the internet, and why Fax.Plus skips it.

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Internet Fax: What Is It?

How sending a fax over the internet works instead of a phone line, and how Fax.Plus fits that definition.

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Handshake: What Happens First

What two fax devices negotiate in the seconds right after a call connects, before any page data moves.

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Gray Scale: Meaning Explained

How many shades of gray a scanned fax page can use, a separate control from contrast or resolution.

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Fax Tones: What You're Actually Hearing

The calling, answering, and negotiation tones fax devices exchange, and how they differ from keypad dialing tones.

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Fax Service Provider: What Is It?

What actually sends, receives, and stores your faxes, and how a modern cloud provider differs from a phone-line setup.

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Fax Routing Extension: What Is It?

Getting a fax to one specific desk behind a shared number, and the dial-string method Fax.Plus uses for it.

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Fax Message: What It Actually Means

What the term "fax message" refers to, and what Fax.Plus itself actually calls each sent or received fax.

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Fax Machine: What Is It?

The physical hardware built to send a fax over a phone line, and how Fax.Plus replaces it entirely.

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Fax Header: What's Included?

The identifying line at the top of every faxed page, and how to control what it shows.

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Fax Gateway: How Does It Work?

The infrastructure bridging an internet fax to the phone network, and its place inside a cloud fax service like Fax.Plus.

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Fax Forwarding: What Does It Mean?

Passing along a fax you already received, to a new fax number or an email inbox, without printing or rescanning.

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Facsimile Signature: Full Definition

The reproduced signature stamped or printed onto a document, and how it differs from an electronic one.

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Facsimile: What Does It Mean?

The formal word behind fax, and what it actually means to send an exact copy of a document.

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ECM (Error Correction Mode): Meaning

What ECM actually corrects mid-fax, and why that's different from simply retrying a failed attempt.

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Document: What You're Actually Faxing

Which file formats Fax.Plus accepts directly, and how a document becomes the pages of a sent fax.

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DNIS: Meaning & Definition

How a receiving system knows which of its numbers a caller actually dialed to reach it.

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DID (Direct Inward Dial): Full Explanation

How a number rings straight to one line with no operator, and why every Fax.Plus number works this way.

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Contrast: What Does It Mean?

The setting that lightens or darkens a page before a fax goes out.

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Confirmation: Proof Your Fax Arrived

What Fax.Plus's confirmation report actually shows, and how to pull one up for a fax you've already sent.

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Communication Error: What Causes It

What causes a fax communication error, and how it differs from a busy line or an unanswered call.

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Coding Method: What It Covers

How fax coding methods compress a scanned page's data, and why one page compresses differently from another.

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CNAM (Calling Name): Meaning

Why a phone number sometimes shows a name and sometimes doesn't, and what actually controls that.

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Caller ID for Fax: What Is It?

The number a fax recipient sees before it connects, and how Fax.Plus lets you set a default one.

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Broadcasting: One Fax, Many Recipients

How sending one fax to many recipients at once works, and the Contact Groups feature behind it.

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Body: The Document You're Actually Faxing

The actual pages being sent in a fax, and how that differs from the cover sheet and the printed header.

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Automatic Redial: Definition

How a fax machine used to redial a busy line, and the retry settings Fax.Plus offers instead.

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ATA (Analog Telephone Adapter): Explained

The hardware that keeps an old analog phone or fax line working, and why Fax.Plus skips it entirely.

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ANI (Automatic Number Identification): Definition

How phone networks automatically capture a caller's number, and why that's different from Caller ID.

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Glossary

Fax Dialing Shortcuts: What Are They?

Fax Account, Storage & Job Queue

Fax Groups and Compatibility: What They Mean

ITU-T Fax Standards: What Do They Cover?

Fax Compression Methods: MH, MR & MMR

CSID vs TSID: Explained

Fax Modem Classes: What Are They?

Fax Cover Sheet Fields: What They Mean

Transmission Verification Report: Explained

Transmission: How a Fax Actually Sends

Tone Dialing (DTMF): What Is It?

TIFF: File Format Explained

Telefax: Full Meaning & Definition

T.38: What Does It Mean?

Station ID: Full Meaning

Secure Fax: What Is It?

Scanning: Full Explanation

Routing Administrator: In Fax Systems

Resolution: Fax Quality Explained

PSTN: What Does It Mean?

POTS Line: What Is It?

Number Porting: How It Works

OCR (Optical Character Recognition): Explained

Network Scanner: Definition

Landline: What Is It?

JBIG: Compression Standard Explained

ITU: What This UN Agency Standardizes

ISDN: What Does It Mean?

Internet Fax: What Is It?

Handshake: What Happens First

Gray Scale: Meaning Explained

Fax Tones: What You're Actually Hearing

Fax Service Provider: What Is It?

Fax Routing Extension: What Is It?

Fax Message: What It Actually Means

Fax Machine: What Is It?

Fax Header: What's Included?

Fax Gateway: How Does It Work?

Fax Forwarding: What Does It Mean?

Facsimile Signature: Full Definition

Facsimile: What Does It Mean?

ECM (Error Correction Mode): Meaning

Document: What You're Actually Faxing

DNIS: Meaning & Definition

DID (Direct Inward Dial): Full Explanation

Contrast: What Does It Mean?

Confirmation: Proof Your Fax Arrived

Communication Error: What Causes It

Coding Method: What It Covers

CNAM (Calling Name): Meaning

Caller ID for Fax: What Is It?

Broadcasting: One Fax, Many Recipients

Body: The Document You're Actually Faxing

Automatic Redial: Definition

ATA (Analog Telephone Adapter): Explained

ANI (Automatic Number Identification): Definition

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