Compare desk phones
Plan your deployment
Find your next desk phone
Search, shortlist two to four phones, then compare specifications and source evidence.
Compare essentials or all specifications. Unknown values stay visible when showing differences.
How to read this comparison
SIP accounts are registrations, not simultaneous calls. Programmable keys count assignable positions across pages, not just physical buttons. Conference capacity and encryption depend on firmware and configuration.
No is an explicit negative; Unknown means unresolved evidence; Not applicable means the field does not apply. An optional adapter is an extra accessory. Open Evidence for model scope, source sections and qualifications.
Differences keep your selected requirements and unknowns visible. Equal headline values can remain when their evidence notes differ.
Your shortlist has changed. Use Compare selected to update this table before sharing or printing. Go to shortlist
All recorded values in this view are the same. Turn off Show differences only or choose All specifications to see more.
Swipe or scroll inside the table to see every product. Keyboard users can focus the table and use arrow keys.
| Specification | Fanvil X6U 15 of 23 specifications recorded Lifecycle: Unknown Record reviewed: 2026-09-11 Selected requirements: 1 met · 1 not met · 0 unknown | AudioCodes 425HD 7 of 23 specifications recorded Lifecycle: Unknown Record reviewed: 2026-09-29 Selected requirements: 0 met · 0 not met · 2 unknown |
|---|---|---|
| Calling | ||
| SIP accounts / linesDifference | 20EvidenceManufacturer specification Fanvil X6U datasheetSection: Generic / Highlights — SIP lines Review note: Specifications follow the currently linked datasheet. Earlier hardware or firmware revisions may differ. Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | Unknown |
| Programmable keysDifference | 60EvidenceManufacturer specification Fanvil X6U datasheetSection: Highlights — assignable DSS capacity Review note: Assignable DSS positions; this count can include multiple pages of keys. Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | 8EvidenceManufacturer specification 425HD IP PhoneSection: 425HD overview > 8 programmable multi-function keys Evidence reviewed: 2026-09-29 |
| Local conference participantsDifference | 6EvidenceManufacturer specification Fanvil X6U datasheetSection: Highlights / Call Features — local audio conference Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | Unknown |
| Display | ||
| Display sizeDifference | 4.3 inEvidenceManufacturer specification Fanvil X6U datasheetSection: Physical Specifications — main LCD Review note: Display size and resolution describe the main screen; this model also has separate DSS displays. Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | 3.5 inEvidenceManufacturer specification 425HD IP PhoneSection: 425HD overview > 3.5-inch colour display Evidence reviewed: 2026-09-29 |
| Display resolutionDifference | 480 x 272EvidenceManufacturer specification Fanvil X6U datasheetSection: Physical Specifications — main LCD Review note: Display size and resolution describe the main screen; this model also has separate DSS displays. Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | Unknown |
| Colour display | YesEvidenceManufacturer specification Fanvil X6U datasheetSection: Physical Specifications — colour screen Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | YesEvidenceManufacturer specification 425HD IP PhoneSection: 425HD overview > colour display Evidence reviewed: 2026-09-29 |
| TouchscreenDifference | Unknown | Unknown |
| Connectivity | ||
| EthernetDifference | GigabitEvidenceManufacturer specification Fanvil X6U datasheetSection: Networking — physical Ethernet Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | Unknown |
| Power over Ethernet | YesEvidenceManufacturer specification Fanvil X6U datasheetSection: Generic / model comparison / power supply Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | YesEvidenceManufacturer specification 425HD IP PhoneSection: 400HD IP Phone Series Highlights > PoE or external supply Evidence reviewed: 2026-09-29 |
| Wi-FiDifferenceRequired: Built in | Does not meet requirementOptional adapterEvidenceManufacturer specification Fanvil X6U datasheetSection: Highlights / Phone Features — Wi-Fi Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | Needs verificationUnknown |
| Wi-Fi standardDifference | Unknown | Unknown |
| BluetoothDifferenceRequired: Built in | Meets requirementBuilt inEvidenceManufacturer specification Fanvil X6U datasheetSection: Highlights / Phone Features — Bluetooth Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | Needs verificationUnknown |
| Bluetooth versionDifference | 4.2EvidenceManufacturer specification Fanvil X6U datasheetSection: Highlights / Phone Features — Bluetooth version Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | Unknown |
| USB portsDifference | 1EvidenceManufacturer specification Fanvil X6U datasheetSection: Physical Specifications — USB 2.0 port Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | Unknown |
| Accessories | ||
| Headset interfacesDifference | Unknown | USBEvidenceManufacturer specification 425HD IP PhoneSection: 425HD Wired Connectivity > USB headset support Evidence reviewed: 2026-09-29 |
| Expansion modulesDifference | Unknown | Unknown |
| Physical | ||
| Wall mountableDifference | Unknown | Unknown |
| Audio | ||
| HD voice | YesEvidenceManufacturer specification Fanvil X6U datasheetSection: Audio / Highlights — HD voice Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | YesEvidenceManufacturer specification 425HD IP PhoneSection: 425HD Amazing Sound > HD voice quality Evidence reviewed: 2026-09-29 |
| Full-duplex speakerphoneDifference | Unknown | YesEvidenceManufacturer specification 425HD IP PhoneSection: 400HD IP Phone Series Highlights > full duplex speakerphone Evidence reviewed: 2026-09-29 |
| Audio codecsDifference | Unknown | Unknown |
| Software | ||
| Operating systemDifference | Unknown | Unknown |
| Security | ||
| TLS signallingDifference | YesEvidenceManufacturer specification Fanvil X6U datasheetSection: Protocols — SIP over TLS Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | Unknown |
| SRTP media encryptionDifference | YesEvidenceManufacturer specification Fanvil X6U datasheetSection: Protocols — SRTP Evidence reviewed: 2026-09-11 Applies to: Fanvil X6U; manufacturer datasheet linked from the reviewed product page. | Unknown |
Compatible phone systems
The indicator shows whether a compatible configuration path is documented, or whether the result still needs verification. A not-listed result does not mean technically incompatible. It does not replace checking the provider firmware branch, tenant, network and feature requirements.
3CX V20
Listed firmware applies to 3CX V20. Cloud or remote phones need a router phone or SBC. Recheck the current provider release before deployment.
Not reviewed
Not reviewed
Zoom Phone
Yealink phones require Zoom-specific firmware. A certification entry does not confirm every feature or regional deployment.
Not reviewed
Not reviewed
Microsoft Teams SIP Gateway
This is SIP Gateway compatibility, not native Teams-phone certification. Use the gateway provisioning path and approved firmware; confirm tenant licensing, policies and network requirements.
Not reviewed
Not reviewed
Specifications may vary by region, hardware revision, firmware, or optional accessory. A review date or recorded field is not a compatibility guarantee. Follow each product’s official sources before purchasing or deploying.
49 phones found
Unknown means not yet verified, not No.
Before choosing a phone
Treat this comparison as a research aid, not a compatibility or purchasing guarantee. Confirm regional variants, firmware support, platform certification, power requirements, accessories, lifecycle status, and current availability with the manufacturer and your phone-system provider.