Compare desk phones
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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.
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| Specification | Fanvil V66 Pro 18 of 23 specifications recorded Lifecycle: Unknown Record reviewed: 2026-09-10 Selected requirements: 1 met · 0 not met · 0 unknown | Avaya J189 8 of 23 specifications recorded Lifecycle: Unknown Record reviewed: 2026-09-29 Selected requirements: 0 met · 0 not met · 1 unknown |
|---|---|---|
| Calling | ||
| SIP accounts / linesDifference | 20EvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Generic — SIP lines Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | Unknown |
| Programmable keysDifference | 116EvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Highlights — DSS key capacity Review note: DSS capacity counts assignable positions across pages, rather than only physical keys. Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | Unknown |
| Local conference participantsDifference | 6EvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Call Features — Audio Conference Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | Unknown |
| Display | ||
| Display sizeDifference | 7 inEvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Highlights / Physical Specifications — LCD Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | 5 inEvidenceManufacturer specification Avaya J100 Series hardware specificationsSection: Table 2, J189 column, Display row; primary display Evidence reviewed: 2026-09-29 |
| Display resolutionDifference | 1024 x 600EvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Physical Specifications — LCD Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | 800 x 480EvidenceManufacturer specification Avaya J100 Series hardware specificationsSection: Table 2, J189 column, Display row; primary display Evidence reviewed: 2026-09-29 |
| Colour display | YesEvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Physical Specifications — colour screen Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | YesEvidenceManufacturer specification Avaya J100 Series hardware specificationsSection: Table 2, J189 column, Display type row Evidence reviewed: 2026-09-29 |
| TouchscreenDifference | YesEvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Highlights — touch screen Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | Unknown |
| Connectivity | ||
| Ethernet | GigabitEvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Network — Physical Ethernet Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | GigabitEvidenceManufacturer specification Avaya J100 Series hardware specificationsSection: Table 2, J189 column, Ethernet switch row: dual 10/100/1000 Evidence reviewed: 2026-09-29 |
| Power over Ethernet | YesEvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Physical Specifications — Power Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | YesEvidenceManufacturer specification Avaya J100 Series hardware specificationsSection: Table 2, J189 column, PoE row Evidence reviewed: 2026-09-29 |
| Wi-FiDifference | Built inEvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Highlights / Phone Features — Wi-Fi Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | Optional adapterEvidenceManufacturer specification Avaya J100 Series hardware specificationsSection: Table 2, J189 column, Wi-Fi support row: optional module Evidence reviewed: 2026-09-29 |
| Wi-Fi standardDifference | Unknown | Unknown |
| BluetoothDifference | Built inEvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Highlights / Phone Features — Bluetooth Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | Optional adapterEvidenceManufacturer specification Avaya J100 Series hardware specificationsSection: Table 2, J189 column, Bluetooth support row: optional module Evidence reviewed: 2026-09-29 |
| Bluetooth versionDifference | 5.4EvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Highlights / Phone Features — Bluetooth version Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | Unknown |
| USB portsDifferenceRequired: ≥ 1 | Meets requirement1EvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Physical Specifications — USB 2.0 port Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | Needs verificationUnknown |
| Accessories | ||
| Headset interfacesDifference | RJ9, USB, EHS (adapter), BluetoothEvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Highlights / Physical Specifications — headset interfaces Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | Unknown |
| Expansion modulesDifference | Unknown | Unknown |
| Physical | ||
| Wall mountableDifference | YesEvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Physical Specifications — Installation Review note: Wall-mount hardware is optional. Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | YesEvidenceManufacturer specification Avaya J100 Series hardware specificationsSection: Table 2, J189 column, Wall mountable row Evidence reviewed: 2026-09-29 |
| Audio | ||
| HD voiceDifference | YesEvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Highlights — HD audio Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | Unknown |
| Full-duplex speakerphoneDifference | Unknown | Unknown |
| Audio codecsDifference | Unknown | Unknown |
| Software | ||
| Operating systemDifference | Unknown | Unknown |
| Security | ||
| TLS signallingDifference | YesEvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Protocols — UDP/TCP/TLS Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; manufacturer datasheet linked from the reviewed product page. | Unknown |
| SRTP media encryptionDifference | YesEvidenceManufacturer specification Fanvil V66 Pro datasheetSection: Protocols — RTP/RTCP/SRTP Evidence reviewed: 2026-09-10 Applies to: Fanvil V66 Pro; 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.
42 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.