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 | Grandstream GRP2611G 12 of 23 specifications recorded Lifecycle: Unknown Record reviewed: 2026-09-09 Selected requirements: 0 met · 0 not met · 1 unknown | AudioCodes 445HD 9 of 23 specifications recorded Lifecycle: Unknown Record reviewed: 2026-09-29 Selected requirements: 0 met · 0 not met · 1 unknown |
|---|---|---|
| Calling | ||
| SIP accounts / linesDifference | 3EvidenceManufacturer specification Grandstream GRP2611G datasheetSection: Technical specifications; SIP accounts / line support Evidence reviewed: 2026-09-09 Applies to: Grandstream GRP2611G, as documented in the reviewed source. Regional availability, provider certification and exact headset combinations are unverified. | Unknown |
| Programmable keysDifference | Unknown | 6EvidenceManufacturer specification 445HD IP PhoneSection: 445HD Features > 6 programmable multi-function keys; excludes 12 sidecar speed-dial keys Evidence reviewed: 2026-09-29 |
| Local conference participantsDifference | 5EvidenceManufacturer specification Grandstream GRP2611G datasheetSection: Technical specifications; local conference Evidence reviewed: 2026-09-09 Applies to: Grandstream GRP2611G, as documented in the reviewed source. Regional availability, provider certification and exact headset combinations are unverified. | Unknown |
| Display | ||
| Display sizeDifference | 2.8 inEvidenceManufacturer specification Grandstream GRP2611G datasheetSection: Technical specifications; Display / LCD Evidence reviewed: 2026-09-09 Applies to: Grandstream GRP2611G, as documented in the reviewed source. Regional availability, provider certification and exact headset combinations are unverified. | 4.3 inEvidenceManufacturer specification 445HD IP PhoneSection: 445HD Features > Graphic 4.3-inch colour LCD screen Evidence reviewed: 2026-09-29 |
| Display resolutionDifference | 320 × 240EvidenceManufacturer specification Grandstream GRP2611G datasheetSection: Technical specifications; Display / LCD Evidence reviewed: 2026-09-09 Applies to: Grandstream GRP2611G, as documented in the reviewed source. Regional availability, provider certification and exact headset combinations are unverified. | 480 x 272EvidenceManufacturer specification 445HD IP PhoneSection: 445HD Features > Graphic 4.3-inch colour LCD screen (480x272) Evidence reviewed: 2026-09-29 |
| Colour display | YesEvidenceManufacturer specification Grandstream GRP2611G datasheetSection: Technical specifications; Display / LCD Evidence reviewed: 2026-09-09 Applies to: Grandstream GRP2611G, as documented in the reviewed source. Regional availability, provider certification and exact headset combinations are unverified. | YesEvidenceManufacturer specification 445HD IP PhoneSection: 445HD Features > Graphic colour LCD screen Evidence reviewed: 2026-09-29 |
| TouchscreenDifference | Unknown | Unknown |
| Connectivity | ||
| Ethernet | GigabitEvidenceManufacturer specification Grandstream GRP2611G datasheetSection: Technical specifications; Network interfaces Evidence reviewed: 2026-09-09 Applies to: Grandstream GRP2611G, as documented in the reviewed source. Regional availability, provider certification and exact headset combinations are unverified. | GigabitEvidenceManufacturer specification 445HD IP PhoneSection: 445HD Features > GbE Support Evidence reviewed: 2026-09-29 |
| Power over Ethernet | YesEvidenceManufacturer specification Grandstream GRP2611G datasheetSection: Technical specifications; Power supply / Power over Ethernet Evidence reviewed: 2026-09-09 Applies to: Grandstream GRP2611G, as documented in the reviewed source. Regional availability, provider certification and exact headset combinations are unverified. | YesEvidenceManufacturer specification 445HD IP PhoneSection: IP Phone Series Highlights > PoE or external power supply Evidence reviewed: 2026-09-29 |
| Wi-FiDifference | Unknown | Unknown |
| Wi-Fi standardDifference | Unknown | Unknown |
| BluetoothDifference | Unknown | Unknown |
| Bluetooth versionDifference | Unknown | Unknown |
| USB portsDifferenceRequired: ≥ 1 | Needs verificationUnknown | Needs verificationUnknown |
| Accessories | ||
| Headset interfacesDifference | EHS, RJ9EvidenceManufacturer specification Grandstream GRP2611G datasheetSection: PDF page 2: Auxiliary Port RJ9 headset jack (allowing EHS with Plantronics headsets) Review note: Port and EHS mode only; exact headset, cable, and call controls require separate compatibility evidence. Evidence reviewed: 2026-09-12 | USBEvidenceManufacturer specification 445HD IP PhoneSection: 445HD Features > USB headset support; other connector paths not assumed Evidence reviewed: 2026-09-29 |
| Expansion modulesDifference | Unknown | Unknown |
| Physical | ||
| Wall mountableDifference | YesEvidenceManufacturer specification Grandstream GRP2611G datasheetSection: PDF page 2: Base Stand Yes, 2 angle positions available, Wall Mountable (Wall Mount *sold separately) Review note: Wall mounting may require a separately available wall mount kit; check this model's datasheet. Evidence reviewed: 2026-09-12 | Unknown |
| Audio | ||
| HD voice | YesEvidenceManufacturer specification Grandstream GRP2611G datasheetSection: Technical specifications; Audio features Evidence reviewed: 2026-09-09 Applies to: Grandstream GRP2611G, as documented in the reviewed source. Regional availability, provider certification and exact headset combinations are unverified. | YesEvidenceManufacturer specification 445HD IP PhoneSection: 445HD hero features > HD voice with SILK vocoder Evidence reviewed: 2026-09-29 |
| Full-duplex speakerphoneDifference | Unknown | YesEvidenceManufacturer specification 445HD IP PhoneSection: IP Phone Series Highlights > Full duplex speaker phone Evidence reviewed: 2026-09-29 |
| Audio codecsDifference | Unknown | Unknown |
| Software | ||
| Operating systemDifference | Unknown | Unknown |
| Security | ||
| TLS signallingDifference | YesEvidenceManufacturer specification Grandstream GRP2611G datasheetSection: Technical specifications; Security / encryption Evidence reviewed: 2026-09-09 Applies to: Grandstream GRP2611G, as documented in the reviewed source. Regional availability, provider certification and exact headset combinations are unverified. | Unknown |
| SRTP media encryptionDifference | YesEvidenceManufacturer specification Grandstream GRP2611G datasheetSection: Technical specifications; Security / encryption Evidence reviewed: 2026-09-09 Applies to: Grandstream GRP2611G, as documented in the reviewed source. Regional availability, provider certification and exact headset combinations are unverified. | 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.