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When your carrier retires the copper line your fax machine uses, the analog dial tone disappears and the machine can no longer connect: faxes stop sending and receiving on cutover day. AT&T is retiring copper wire center by wire center, finishing nationwide by 2029 with exemptions in California. Your options are an ATA adapter, a POTS-in-a-box appliance, or switching to online fax.
A fax machine is an analog device. It talks to the phone network using the T.30 fax protocol: an analog handshake, tones, and a modulated signal that rides on copper wire. When your carrier retires the copper line feeding your address, the analog dial tone disappears. The machine has nothing to dial on, so sending and receiving both fail on cutover day. The box itself is not broken; the road it drove on is gone.
Carriers retire copper wire center by wire center rather than all at once, so it lands as a local event, not a single national one. You get a retirement notice from your carrier with a cutover date. On that date, anything that needs an analog dial tone: fax machines, old alarm panels, credit-card terminals with phone jacks, stops connecting.
AT&T has published the clearest timetable of any major carrier. Its plan retires copper in two stages: roughly 1,300 wire centers went first starting in 2025, and the nationwide shutdown finishes by 2029. California may move slower, since regulators there have pushed back on the pace and some areas may end up exempt.
| Phase | Period | What happens |
|---|---|---|
| Phase 1 | 2025 to 2027 | Copper retired in areas without fiber; customers moved to wireless, satellite, or online services. |
| Phase 2 | 2027 to 2029 | Remaining copper retired in fiber build-out areas; customers moved to fiber connections. |
| California | Under review | Consumer protections and union advocacy may slow or exempt parts of the state. |
One detail that matters if you still depend on a copper line: retirement filings go through the FCC, which runs a 90-day objection period on each notice. If your carrier says your wire center is on the retirement list and you cannot move off copper yet, that window is the time to speak up, not after the cutover date passes.
Canadian readers should work from their own carrier's notices rather than AT&T's dates. Canadian carriers are also retiring copper as fiber builds reach neighbourhoods, but the schedule is per carrier and per area. Whatever your phone bill says is the source that matters for your address.
Three paths work in practice. None is complicated, but they differ in how much of your existing setup survives.
| Option | What it does | What to watch for |
|---|---|---|
| ATA adapter | Converts your internet connection into an analog phone jack the fax machine plugs into. | Fax tones are fussy over the internet: packet loss and jitter can garble pages, so ask for an adapter set up for faxing, not just voice. |
| POTS-in-a-box appliance | A cellular or satellite box that presents a standard phone jack to your machine. | It needs power and a battery backup to survive outages, which old copper lines handled on their own. |
| Online fax service | You upload documents through a website or app; the service transmits them as faxes. No phone line at all. | Your physical machine becomes redundant. Good if the machine was only ever a means to an end. |
On the adapter option: AT&T's own Phone-Advanced adapter supports legacy analog devices, but it needs a battery backup to keep them working during a power outage. Copper lines carried their own power from the central office, which is why your old phone worked when the lights went out. Internet-based replacements do not, so budget for the backup battery or accept the outage gap.
On faxing over internet voice: the T.30 protocol was designed for steady analog signals, and compressed, packetized voice can distort the fax tones enough to fail or mangle a page. If you go the adapter route, test it with a real recipient before you depend on it for anything important.
If the machine's only job was sending faxes, you may not need a replacement box at all. LetterAgent sends faxes through your AI assistant: you describe what to send, you get a per-fax quote with the page count verified, you approve the exact total, and the fax goes out to a US or Canadian fax number. Two honest limits: the fax feature is currently in testing, so we do not promise a fax sends today, and LetterAgent cannot receive faxes. It is a sending service, not a fax number of your own.
Ready to fax it? Fax with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is sent.
LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.
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