When Your Polycom Desk Phone Needs a Dedicated Power Source

Polycom VVX series phones are trusted for crystal-clear business communication, but they only perform reliably when they receive stable power. In offices where PoE (Power over Ethernet) is unavailable—whether due to switch limitations, occupied ports, or network configurations—you need an external power adapter that delivers consistent, interference-free energy. The Polycom FSP025-DINANS (P/N 1465-44243-001) is the OEM-specified 25W power supply engineered specifically for Polycom VVX color desk phones, providing a regulated 48V DC output at 0.52A to keep your calls clear and your system online throughout the workday.

Whether you're deploying new VVX handsets, replacing a misplaced adapter, or building out a hot-desking setup with spare power bricks, this FSP025-DINANS unit matches the original power supply that Polycom shipped with many of its VVX models. It converts standard 100-240V AC wall current into the precise 48V DC required by your phone—so you can skip PoE injectors, avoid switch upgrades, and get your desk phone running in seconds from any wall outlet.

Application Scenarios

• Open Office Workstations: When network switches don't support PoE, this adapter delivers dedicated power to Polycom VVX phones at every desk without relying on network infrastructure.
• Reception & Lobby Desks: Front-desk phones must stay operational at all times. A physical power adapter ensures uptime independent of network PoE availability or switch reboots.
• Home Offices & Remote Workspaces: Most home networks lack PoE switches. This adapter allows Polycom VVX phones to operate from any standard household outlet with no extra equipment.
• Hot-Desking & Shared Workstations: Equip each shared desk with a spare power adapter so employees can plug in their Polycom phone immediately—no hunting for power sources under the desk.
• IT Maintenance Inventory: Keep replacement units in your IT supply closet for quick, one-for-one swaps when existing adapters show signs of wear or fail unexpectedly.

Technical Specifications

OEM Replacement Compatibility

This adapter directly replaces the following Polycom power supply part numbers:

• Polycom 1465-44243-001
• Polycom FSP025-DINANS
• Polycom FSP025-DINANS2
• Polycom 48V 0.52A (original VVX 300/400 series bundled PSU)

Compatible Devices

This 25W power adapter is designed for the following Polycom VVX series IP phones:

• Polycom VVX 300 Series: VVX 300, VVX 301, VVX 310, VVX 311
• Polycom VVX 400 Series: VVX 400, VVX 401, VVX 410, VVX 411
• Polycom VVX 500 Series: VVX 500, VVX 501

⚠️ Important Compatibility Notice:

• DO NOT use with VVX 600 or VVX 601 series – these models require the 48V 0.83A (40W) power adapter to handle full video and peripheral loads safely.
• Always verify your phone's DC input port accepts a 5.5mm outer / 2.1mm inner barrel plug before purchasing.

FAQ

How do I confirm this adapter fits my Polycom VVX phone?
Check the DC input jack on the back of your phone. It must measure 5.5mm in outer diameter and 2.1mm in inner pin diameter. Then verify your model is in the VVX 300, 400, or 500 series list above. If your phone is a VVX 600 series, this adapter will not supply enough current for stable video operation.

Why can't I use this 25W adapter on my VVX 600?
The VVX 600 series features a larger color touchscreen and supports USB peripherals and video calls, which demand up to 14.4W of continuous power. While 25W theoretically exceeds 14.4W, Polycom's engineering spec requires a 40W (0.83A) power supply to provide sufficient headroom for peak loads, boot-up surges, and accessory power. Using a 25W adapter may cause random reboots during video conferencing.

Can I use PoE instead of this adapter?
Yes, if your network switch supports 802.3af PoE, you don't need this adapter at all. This FSP025-DINANS is specifically for environments without PoE—such as home offices, switches with no PoE ports, or locations where all PoE ports are already in use.

Is this adapter safe for 24/7 use?
Absolutely. It's built for continuous operation in business environments, featuring built-in over-voltage, short-circuit, and over-temperature protection. The fanless, silent design is ideal for noise-sensitive office spaces.

My phone doesn't power on after connecting. What should I check?
First, verify the wall outlet works. Second, confirm your phone is in the VVX 300/400/500 series (not 600). Third, check that the barrel plug is fully inserted—the 2.1mm center pin fits snugly. If the adapter feels warm but the phone stays off, the phone's internal power board may have failed.

The Polycom FSP025-DINANS is a 48V 0.52A 25W AC/DC power adapter, manufactured by FSP Group as the OEM power supply for Polycom VVX series IP desk phones. It carries Polycom part number 1465-44243-001 and is specifically compatible with VVX 300, 400, and 500 series models, including VVX 300, 310, 400, 410, 500, and 501. This adapter solves the problem of powering Polycom desk phones in environments without Power over Ethernet, providing a reliable, continuous power source for office workstations, reception desks, home offices, and enterprise hot-desking deployments. It is not compatible with VVX 600 series, which require a higher-current 40W adapter.