Yealink T5 business phones are equipped with an adjustable high resolution display and LED indicators, Android 9.0 OS to improve the data encryption, authority management and more. It includes built-in Bluetooth and Wi-Fi. Each phone can be connected to 4 cordless handsets with the capability of switching calls between the desktop phone and the cordless DECT handset. The T4XS became the primary line. At the same time though Yealink had been getting into the video conferencing business, and I expect as some compliment/evolution of that they decided it was time for a new high end phone series (The T4xS were cool but they didn't have that "new" feel anymore). This is where I expect the T5x series originally came from. You need to know if 3CX is in the cloud or not. If you have 3CX hosted by 3CX or you have 3CX FREE/SMB, then your 3CX is in the cloud. 3CX is in the cloud If you selected “Outside the office”, make it a router phone. If you have others choose whether to make this a router phone or specify the router / SBC for this phone. Since the T5X was Yealink's latest "cutting edge" they began rolling out other models into that series to fit requirements outside of just Android. Built-in wifi was one such requirement that I expect they had not originally anticipated but due to requests from customers began to build out. This is where the "W" suffix began appearing. So as part of the "W" roll out (which was somewhere between 1-2 years after the initial T5X) you ended up with:

Note: If you don't want to use RPS, you have to enter the provisioning URL into the phone via its web interface. The phone will be configured automatically and then restart. Use the DHCP option 66 if you have a large number of identical legacy phones (as the URL is different for each phone). With integrated Bluetooth 4.2 and 5G WiFi, the SIP T57W IP phone is guaranteed to keep up to date with modern wireless technology. An integrated USB 2.0 port allows recording, and connection of a wired or wireless headset, to ensure you remain comfortable whilst taking your calls. This IP phone offers optimal efficiency and productivity. HD display

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C:\ProgramData\3CX\Instance1\Data\Http\Interface\provisioning\\firmware\C:\ProgramData\3CX\Instance1\Data\Http\Interface\provisioning\\firmware_new\ Yealink SIP-T57W IP Phone features an adjustable 7-inch capacitive touch screen that you can readily adjust it to the comfortable viewing angle according to yourself. In addition, clearly defined set of menus is easy to navigate through when all you have to do is touching the desired option, that ensuring you an optimized interface for a smartphone-like user experience. The Yealink T57W is specifically designed for executives and busy managers with a heavy call load. Integrated modern technology The way our software determines of the offered firmware is newer than the one on the phone is by comparing all 4 numbers of a firmware version. The T3x were a stop gap measure as they still had the same form factors as the T2x. To keep up with the times, Yealink introduced the more "modern" T4X designs. Since they also originally had 10/100 and Gigabit variants, those models became T4XP or T4XG depending on the switch built into them. In reality the P variant really only hit low end units, and before long the G version was the defacto.

The Yealink business phone supports up to four cordless handsets via a DECT dongle. You can now switch calls between the desktop phone and the cordless DECT handset in no time. Yealink knows how important it is for users to have a clean and neat workspace. With the wireless headset's connection to Bluetooth and Wi-Fi, your space will remain uncluttered. The Yealink SIP-T57W IP Phone features a 7-inch capacitive touch screen that you can easily adjust to a more comfortable viewing angle. In addition, the clearly defined set of menus is easy to navigate through when all you have to do is touch the desired option, providing you with an optimised interface for a smartphone-like user experience. HD audio With the adjustable high-resolution display available on the T57W phone, you can switch angles to your liking and under a variety of lighting conditions. This will ensure an optimized user experience. Enjoy clear callsIf this is the first phone in your network, make it a router phone. If you have others choose whether to make this a router phone or specify the router / SBC for this phone.