Replacing the phone or intercom system in an old building often runs into one obstacle: the cabling. Pulling new network cable to every room means opening ceilings, breaking walls, and disrupting residents or operations. Fanvil's 2-Wire solution is built specifically to get around that.
What is the 2-Wire solution?
2-Wire lets IP devices run over the two-wire cabling a building already has, such as analog telephone (PSTN) wiring or RVV cable. That single two-wire line carries both power and network, so a device just plugs in without any new LAN cable. It reaches up to 300 meters and installs plug-and-play.
The key devices
- X303-2Wire: a dedicated 2-Wire IP phone that connects over an RJ11 connector, reusing the existing telephone wiring. Ideal for turning old analog handsets into IP without rewiring.
- PN1 / PN8 / PN24 converters: turn two-wire (PSTN or RVV) cabling into an IP link while also supplying power. PN1 handles a single device, PN8 and PN24 handle many, and they can be cascaded over ethernet for more stable transmission.
- i62-2: the 2-Wire version of the door phone for renovating an old building's door intercom without changing the cable. See the full door phone lineup in the article on video door phones for office and apartment security.
When 2-Wire makes the most sense
- Hotel renovations: reuse the existing in-room cabling to upgrade the phone system from analog to SIP, saving time and cost, with cloud management support.
- Offices already in operation: add or replace IP phones without closing the office for cabling work. Network speed stays intact through ethernet cascading.
- Older apartments or condominiums: buildings with limited wiring can be upgraded to IP intercom without breaking into unit walls.
Why it beats pulling new cable
The biggest benefit of 2-Wire is saving on cable and installation labor while cutting disruption to occupants. Because there is no major cabling work, sign-off from building management or residents tends to come faster, and the project finishes sooner too. For distributors and integrators, pairing 2-Wire with IP also opens up the market of older buildings that a pure IP solution cannot serve.
A limitation worth knowing
2-Wire shines for upgrades over cabling that already exists. For a brand-new building with no wiring at all, running standard network cable from the start is usually more flexible. So treat 2-Wire as a practical upgrade path, not a replacement for network cabling on projects truly built from scratch.
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