Why is my fax machine not sending faxes?

The most common cause is a phone line issue — check that the cord is in the LINE port (not EXT), verify you have a dial tone, and confirm you're dialing the correct number with area code. See our [complete fax troubleshooting guide](/blog/fax-not-going-through/) for step-by-step fixes.

How do I fix "no dial tone" on my fax machine?

Unplug the phone cord and plug a regular phone into the same wall jack. If you hear a dial tone, the issue is the fax machine's cord or port. If not, contact your phone provider. Make sure the cord is in the LINE port, not EXT.

Can I fax over VoIP or digital phone lines?

Yes, but VoIP compresses audio signals that fax machines need. Set your codec to G.711, reduce the baud rate to 9600 bps, and disable ECM. For reliable faxing, consider [cloud fax](/blog/cloud-fax/) or a T.38-compatible provider.

Why does my fax say "busy" every time I try to send?

The recipient's line may be in use, or call waiting is interfering. Dial *70 before the fax number to disable call waiting. If the problem persists, try off-peak hours or use [mFax.to](https://mfax.to) to bypass phone-line issues entirely.

When should I replace my fax machine instead of repairing it?

If your machine needs frequent repairs, can't connect over VoIP, or costs more to fix than replace, it's time to switch. Online fax services like [mFax](https://mfax.to) eliminate hardware entirely — send from your phone with a 98% success rate.

Fax Machine Not Working? 10 Common Problems & Fixes

Fax machine not working? Here are the 10 most common fax problems — no dial tone, busy signals, paper jams, VoIP failures — with step-by-step fixes for each.

Frequently Asked Questions

Why is my fax machine not sending faxes?: The most common cause is a phone line issue — check that the cord is in the LINE port (not EXT), verify you have a dial tone, and confirm you're dialing the correct number with area code. See our [complete fax troubleshooting guide](/blog/fax-not-going-through/) for step-by-step fixes.
How do I fix "no dial tone" on my fax machine?: Unplug the phone cord and plug a regular phone into the same wall jack. If you hear a dial tone, the issue is the fax machine's cord or port. If not, contact your phone provider. Make sure the cord is in the LINE port, not EXT.
Can I fax over VoIP or digital phone lines?: Yes, but VoIP compresses audio signals that fax machines need. Set your codec to G.711, reduce the baud rate to 9600 bps, and disable ECM. For reliable faxing, consider [cloud fax](/blog/cloud-fax/) or a T.38-compatible provider.
Why does my fax say "busy" every time I try to send?: The recipient's line may be in use, or call waiting is interfering. Dial *70 before the fax number to disable call waiting. If the problem persists, try off-peak hours or use [mFax.to](https://mfax.to) to bypass phone-line issues entirely.
When should I replace my fax machine instead of repairing it?: If your machine needs frequent repairs, can't connect over VoIP, or costs more to fix than replace, it's time to switch. Online fax services like [mFax](https://mfax.to) eliminate hardware entirely — send from your phone with a 98% success rate.