Yealink SIP-T55A MS Teams IP Phone 4.3in Touch GbE PoE WiFi BT Desk Wty

Yealink SIP-T55A Microsoft Teams IP Phone

The Yealink SIP-T55A is a Microsoft Teams-certified IP phone with a 4.3-inch colour touchscreen, built-in WiFi and Bluetooth, and Gigabit PoE — backed by a 12-month Reboot IT warranty. Designed for hot-desking, open-plan offices, and Teams-native deployments where flexibility and ease of use are priorities.

Key Benefits

• Microsoft Teams Native: Runs Teams firmware natively — sign in with your Microsoft 365 credentials and access Teams calls, meetings, and contacts directly from the phone.
• 4.3-Inch Touchscreen: Colour capacitive touchscreen for intuitive call management, calendar, and Teams interface navigation without a separate controller or PC.
• Built-In WiFi & Bluetooth: Connect wirelessly via WiFi 802.11 b/g/n/ac for flexible desk placement; pair headsets and devices via Bluetooth 4.2.
• Gigabit PoE: Dual Gigabit Ethernet ports with PoE (802.3af/at) — power the phone and passthrough to a PC from a single cable run.
• Optima HD Voice: Full-duplex HD audio with Yealink Noise Proof and echo cancellation ensures clear call quality in open-plan environments.
• Hot-Desk Ready: Sign in and out with Microsoft 365 credentials — ideal for hot-desking environments where multiple staff share the same phone.

Performance in Use

In a Microsoft Teams environment, the SIP-T55A removes the need to use a PC or mobile for every call. Staff sign in with their Microsoft 365 credentials and have instant access to their Teams contacts, calendar, and call history directly from the phone. The 4.3-inch touchscreen makes navigating the Teams interface natural and familiar — the same layout as the desktop app, on a purpose-built device.

The dual Gigabit ports with PoE passthrough mean the phone and a connected PC both receive network access from a single Ethernet run — practical in hot-desking and open-plan setups where cable management matters. WiFi support adds further flexibility for desk arrangements where Ethernet is not practical.

For IT teams, the SIP-T55A's Teams certification simplifies deployment: no complex SIP trunking configuration is required. Devices are managed through the Microsoft Teams admin centre alongside all other Teams-certified endpoints, making provisioning and updates straightforward at scale.

Tech Specs

Display	4.3-inch 480x272 colour touchscreen
Platform	Microsoft Teams (native), SIP also supported
WiFi	802.11 b/g/n/ac (built-in)
Bluetooth	Bluetooth 4.2 (built-in)
Ethernet	2 x Gigabit Ethernet (PoE + PC passthrough)
Power	PoE 802.3af/at or AC adapter
Audio	Optima HD, full-duplex, Noise Proof
USB	1 x USB-A (headset or expansion)
Warranty	12 months — Reboot IT

Is It Right for You?

Best For ✓	Not For ✗
Microsoft Teams-native office deployments	Non-Teams environments (Cisco, Avaya, Nortel)
Hot-desking & shared workstation setups	Analogue phone system (PSTN-only) environments
Open-plan offices needing wireless flexibility	Conference rooms needing 360° mic pickup
IT teams managing Teams endpoints at scale	Heavy outbound call centre use

Condition Grades

Grade	Condition	Cosmetics
A — Excellent	Fully tested & working	Minimal marks or scuffs, near-new appearance
B — Good	Fully tested & working	Light wear, scratches or marks visible on housing

Frequently Asked Questions

Does the SIP-T55A run Microsoft Teams natively?

Yes. The SIP-T55A is Microsoft Teams certified and runs Teams firmware. Sign in with your Microsoft 365 account to access Teams calls, calendar, meetings, and contacts directly from the phone.

Can it also be used as a standard SIP phone?

Yes. The SIP-T55A supports both Teams and standard SIP mode — you can switch firmware between Teams and generic SIP to suit your deployment.

Does the phone need a power adapter?

No — the SIP-T55A is PoE (802.3af/at) powered. A single Ethernet cable from a PoE switch provides both network and power. An AC adapter can be used if PoE is unavailable.

Is it suitable for hot-desking?

Yes. Staff sign in and out with their Microsoft 365 credentials, making the SIP-T55A ideal for shared desks and flexible workspaces.

What are the shipping costs?

Shipping costs apply based on size and destination — rates are calculated at checkout.