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Phone Guides

Grandstream GXP1628

Specifications

Calling

SIP accounts / lines
2
Programmable keys
8
Local conference participants
3

Display

Display size
2.95 in
Display resolution
132 x 48

Connectivity

Ethernet
Gigabit
Power over Ethernet
Yes

Accessories

Headset interfaces
RJ9

Physical

Wall mountable
Yes

Audio

HD voice
Yes

Security

TLS signalling
Yes
SRTP media encryption
Yes

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 V20Needs verification

Listed firmware applies to 3CX V20. Cloud or remote phones need a router phone or SBC. Recheck the current provider release before deployment.

Grandstream GXP1628

Needs verification Not on reviewed list

Evidence reviewed: 2026-09-11

Sources and scope

Grandstream GXP1628. Current provider lists only. Not listed does not establish technical incompatibility. Historical 3CX V18 firmware and configuration material is not treated as current V20 support. Regional availability, hardware revisions and accessories remain unverified. No tenant or device was tested.

Zoom PhoneNeeds verification

Yealink phones require Zoom-specific firmware. A certification entry does not confirm every feature or regional deployment.

Grandstream GXP1628

Needs verification Not on reviewed list

Evidence reviewed: 2026-09-11

Sources and scope

Grandstream GXP1628. Current provider lists only. Not listed does not establish technical incompatibility. Historical 3CX V18 firmware and configuration material is not treated as current V20 support. Regional availability, hardware revisions and accessories remain unverified. No tenant or device was tested.

  • Zoom Phone certified hardware

    Desk phones > Grandstream exact-model table; the GXP model is absent; the page directs owners of unlisted models to Grandstream if assisted provisioning fails

Microsoft Teams SIP GatewayNeeds verification

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.

Grandstream GXP1628

Needs verification Not on reviewed list

Evidence reviewed: 2026-09-11

Sources and scope

Grandstream GXP1628. Current provider lists only. Not listed does not establish technical incompatibility. Historical 3CX V18 firmware and configuration material is not treated as current V20 support. Regional availability, hardware revisions and accessories remain unverified. No tenant or device was tested.