Description

Yealink SIP-T57W IP Phone 7-Inch Touchscreen GigE Desk Phone Dubai

Replacing a Yealink T57W? Move to the T77U Touchscreen Platform

The Yealink SIP-T57W gave Dubai offices a large 7-inch touch screen, built-in wireless, and a premium executive desk experience. For new deployments and refresh projects, the Yealink SIP-T77U is the correct T7-generation successor when the buyer wants to preserve the large touch-screen workflow. It brings a slimmer modern body, a 7-inch colour touch display, 16 SIP accounts, 84 programmable keys, dual Gigabit Ethernet, USB-A and USB-C ports, Smart Noise Filtering, Acoustic Shield, Trusted Execution Environment security, and EXP55 expansion support.

Important wireless note: the T57W had Wi-Fi and Bluetooth built in. The T77U does not. For wireless connectivity on a T77U desk, add the Yealink WF50 Wi-Fi dongle and BT41 Bluetooth dongle. If the buyer wants built-in Wi-Fi 6 and Bluetooth 5.0 more than the 7-inch touch screen, quote the Yealink T74W instead.

SIP or Microsoft Teams? Get the Platform Right Before You Order

The T77U is a SIP phone for SIP-compatible systems such as 3CX, Yeastar, Grandstream UCM, Asterisk, FreePBX and hosted PBX platforms. It is not a Microsoft Teams phone. Yealink Teams phones are a separate MP-series range, and a SIP T7 phone cannot be converted into a Teams phone by field firmware flashing. This is the most common Yealink buying mistake in UAE offices, especially when older T5-era buyers remember same-body Teams variants.

Your Platform	Right Phone	What You Need
SIP PBX — 3CX, Yeastar, UCM, Asterisk, hosted PBX	SIP-T77U (this page)	SIP credentials from your phone system
Microsoft Teams	Yealink MP-series Teams phone — ask David for the current certified model	Microsoft 365 tenant + Teams Phone licence per user
Zoom Phone	Zoom-certified Yealink range — ask David	Zoom Phone licence per user

PoE Truth — No Power Adapter in the Box

The Yealink SIP-T77U ships without a power adapter. It is normally powered by PoE from your network switch. If your switch is not PoE-capable, ask David to add the matching Yealink power supply to the quote. This matters during Dubai office refreshes because many buyers replace the phone but forget the power source. For desks using two or three EXP55 expansion modules, the external PSU is required regardless of PoE.

Gigabit Passthrough for Modern Dubai Desks

The T77U includes dual Gigabit Ethernet ports, so the phone can sit between the wall port and the user laptop without slowing the desk down to 100Mbps. For offices replacing older T4x or early T5-era phones, this is not just a phone upgrade — it is a desk network upgrade. Dubai offices running cloud storage, Teams meetings, CRM, ERP and large file transfers should not let an old phone throttle a 1Gbps network drop.

T77U in the Yealink Range — Where It Sits

The T77U is the flagship touchscreen model in the T7 desk-phone range. The T74W below it is the better choice for wireless executive desks that need built-in Wi-Fi 6 and Bluetooth 5.0. The T77U is the better choice for executives, reception, supervisors and power users who want a large 7-inch touchscreen, more programmable keys on the phone body, and the largest visual control surface in the T7 series.

Feature	T74W	SIP-T77U ★	T77U + EXP55 Console
Display	4.3″ 480×272 colour	7″ 800×480 touchscreen	7″ touch + 5.5″ EXP55 screens
SIP Accounts	16	16	16
Programmable Keys	50	84	Up to 318 total with 3× EXP55
GigE	Dual GigE	Dual GigE	Dual GigE
Wi-Fi / Bluetooth	Built-in Wi-Fi 6 + BT 5.0	Via WF50 / BT41 accessories	Via WF50 / BT41 accessories
Conference	10-way	10-way	10-way
Expansion	Up to 3× EXP55	Up to 3× EXP55	1–3× EXP55 configured before dispatch
Replaces	T53W / wireless executive desks	T48U / T57W-class touchscreen desks	Legacy reception and supervisor consoles
Price Tier	Mid-executive wireless	Flagship touchscreen	Operator console package
Choose if…	You need built-in Wi-Fi and Bluetooth more than a large touchscreen	You are replacing T57W/T48U-style touch desks and want the flagship T7 interface	Reception or supervisors need hundreds of BLF keys visible at once

Where the T77U Works in Dubai

Executive desks replacing T57W. The T77U is the natural quote when the buyer asks for a modern Yealink touchscreen desk phone after using the SIP-T57W. It keeps the large-screen control style and moves the desk into the T7 platform with stronger security, cleaner UI, improved audio processing, and EXP55 console compatibility.

DIFC, DMCC and Business Bay offices. Senior managers, finance teams, legal offices and procurement heads often need multiple line appearances, transfer keys, BLF monitoring and quick conference access. The 7-inch touchscreen makes those actions easier than a smaller display, while dual GigE keeps the laptop behind the phone running at full office network speed.

Reception and supervisor desks. With 84 programmable keys on the phone body, the T77U can handle more BLF and speed-dial work before adding a module. For hotel front desks, clinic reception counters, logistics offices in Jebel Ali, and call-centre supervisors, add one to three EXP55 modules and Vector Digital Systems will map the extensions before dispatch.

SIP platform refresh projects. The T77U works with 3CX, Yeastar P-Series, Grandstream UCM, Asterisk, FreePBX and hosted SIP platforms. For multi-branch rollouts across Dubai, Sharjah, Abu Dhabi and the wider UAE, Vector Digital Systems stages SIP registration, dial plan, BLF keys and test calls before the phones leave our Dubai team.

Full Technical Specifications

Specification	Yealink SIP-T77U
Display	7-inch 800×480 colour touchscreen
SIP Accounts	16
Programmable Keys	84 on-device programmable keys
Local Conferencing	10-way local conference
Network Ports	2× Gigabit Ethernet ports — LAN + PC passthrough
USB	USB-A and USB-C ports for headsets and accessories
Wi-Fi	Not built in — add WF50 if wireless network connectivity is required
Bluetooth	Not built in — add BT41 for Bluetooth headset / mobile pairing requirements
Audio	HD voice, Acoustic Shield, Smart Noise Filtering, speakerphone support
Security	Trusted Execution Environment security layer
Power	PoE powered. PSU not included. External PSU required for non-PoE switches and 2–3 EXP55 console setups.
Expansion Modules	Supports up to 3× Yealink EXP55 colour expansion modules
Headset Support	USB headset support and EHS wireless headset support — confirm adapter model with David
Compatible Platforms	3CX, Yeastar P-Series, Grandstream UCM, Asterisk, FreePBX, hosted PBX and RFC-compliant SIP servers
Successor Context	Recommended T7 touchscreen successor for SIP-T57W / T48U-style executive desks

Compatible Accessories

Accessory	Model	Purpose
Expansion Module	EXP55	5.5-inch colour expansion module, 78 keys per module, up to 3 cascaded. External PSU required for 2–3 modules.
Wi-Fi Dongle	WF50	Adds Wi-Fi connectivity to T77U desks where Ethernet is unavailable or temporary.
Bluetooth Dongle	BT41	Adds Bluetooth headset and mobile pairing support where required.
Power Supply	Yealink PSU — confirm at quote stage	For non-PoE switch ports and multi-EXP55 console desks.
USB / DECT Headsets	Yealink UH / WH range	For call-centre agents, reception, executives and hands-free work. Confirm exact model compatibility with David.
EHS Adapter	EHS adapter — confirm current model	Remote answer and hang-up from compatible Yealink wireless headsets.

Staging Before Dispatch

Vector Digital Systems stages every Yealink SIP-T77U before dispatch from Dubai. We load SIP registration details, apply the provisioning template, configure BLF and speed-dial keys, test the dial plan, confirm audio, verify a live test call, and label the phone for the correct desk or branch. For EXP55 console orders, the BLF wall is programmed before delivery and the required external PSU is included in the quote. The result is a phone that arrives ready for the user, not a box that creates work for your IT team.

Export from Dubai

Vector Digital Systems supplies Yealink SIP-T77U phones from Dubai to system integrators, telecom operators, hotel groups, PABX installers and corporate IT procurement teams across the region. Common export routes include Oman, Saudi Arabia, Kuwait, Qatar and Bahrain in the GCC; Jordan and Egypt in the wider Arab market; Kenya and Tanzania in East Africa; and Pakistan, Sri Lanka and Bangladesh for South Asian projects. We quote FOB Dubai with commercial invoice, packing list and certificate of origin on request. VAT breakdown, delivery charges and project pricing for 5+ units are handled at quotation stage.

Frequently Asked Questions — Yealink SIP-T77U

Is the Yealink T77U the replacement for the T57W?

The Yealink SIP-T77U is the recommended T7-generation successor when a T57W buyer wants to keep the large touchscreen desk-phone experience. The T57W included built-in Wi-Fi and Bluetooth, while the T77U uses optional WF50 and BT41 accessories for wireless needs. If built-in Wi-Fi 6 and Bluetooth are more important than the 7-inch touchscreen, choose the T74W instead.

Does the Yealink T77U work with Microsoft Teams?

No. The T77U is a SIP phone for SIP PBX platforms such as 3CX, Yeastar, Grandstream UCM, Asterisk, FreePBX and hosted PBX. Yealink Microsoft Teams phones are a separate MP-series range, and there is no Teams edition of the T77U. Ask David for the current Teams-certified Yealink MP model if your office uses Teams Phone.

Does the T77U come with a power adapter, or do I need PoE?

The T77U does not include a power adapter. It normally runs on PoE from your network switch. If your switch does not provide PoE, add the matching Yealink PSU to the order. If you use two or three EXP55 expansion modules, the external PSU is required regardless of PoE.

Will the T77U work with our 3CX, Grandstream UCM, Yeastar or existing SIP PABX?

Yes. The Yealink SIP-T77U works with RFC-compliant SIP systems including 3CX, Yeastar P-Series, Grandstream UCM, Asterisk, FreePBX and hosted PBX services. Vector Digital Systems stages the phone with your SIP registration, provisioning template, BLF keys and dial-plan test before dispatch.

T77U vs T74W — which one should I buy?

Choose the T77U if you want the 7-inch touchscreen, 84 programmable keys and flagship desk-phone experience. Choose the T74W if you want built-in Wi-Fi 6 and Bluetooth 5.0 on a smaller 4.3-inch screen. For T57W replacement projects, T77U is the touch-screen successor; T74W is the wireless-successor alternative.

Does the T77U have built-in Wi-Fi and Bluetooth like the T57W?

No. The T77U supports wireless connectivity through optional accessories: WF50 for Wi-Fi and BT41 for Bluetooth. This is the main difference T57W buyers must understand before ordering. If built-in wireless is mandatory, ask David to quote the T74W or include the correct accessories with the T77U.

How many BLF keys can I get with the T77U and EXP55 modules?

The T77U has 84 programmable keys on the phone body. Each EXP55 adds 78 keys, and up to three modules can be cascaded. That gives up to 318 programmable keys in total, suitable for reception desks, hotel front desks and call-centre supervisor stations. Desks using two or three EXP55 modules need the external PSU.

Does the T77U pass Gigabit speed through to my laptop?

Yes. The T77U has dual Gigabit Ethernet ports, so your laptop can connect through the phone without being limited to 100Mbps. This matters in Dubai offices where a computer sits behind the phone and the network team has already delivered 1Gbps to the desk.

Who is the authorised Yealink supplier in Dubai?

Vector Digital Systems LLC has supplied and integrated Yealink solutions in Dubai since 2009. David handles Yealink product selection, project pricing, staging, delivery coordination and local warranty support. Phones are configured before dispatch so buyers avoid international courier claims and on-site setup delays.

What is the best Yealink IP phone for an executive desk in Dubai?

For a touch-screen executive desk, the Yealink SIP-T77U is the strongest SIP choice because it combines a 7-inch display, 16 SIP accounts, 84 programmable keys and dual Gigabit Ethernet. For a wireless executive desk where built-in Wi-Fi 6 and Bluetooth matter more than the large touch screen, choose the Yealink T74W.

Does Vector Digital Systems export Yealink T77U phones from Dubai?

Yes. Vector Digital Systems exports Yealink phones from Dubai to integrators, operators and corporate buyers in Oman, Saudi Arabia, Kuwait, Qatar, Bahrain, Jordan, Egypt, Kenya, Tanzania, Pakistan, Sri Lanka and Bangladesh. Shipments are quoted FOB Dubai with commercial invoice, packing list and certificate of origin on request.

Does Vector Digital Systems configure the T77U before delivery?

Yes. Every T77U can be staged before dispatch with SIP registration, provisioning template, BLF and speed-dial keys, codec settings, dial-plan test and a live test call. For EXP55 console orders, the full BLF map is programmed before the phones leave Dubai.