|Item Weight||3.1 pounds|
|Product Dimensions||10 x 9.5 x 4 inches|
|Item model number||SIP-T28P|
|Manufacturer Part Number||SIP-T28P|
Yealink SIP-T28P na 1-Handset 6-Line Landline Telephone (Power supply not included - PS5V1200US)
- Enter your model number to make sure this fits.
- 320x160 graphic LCD with 4-level grayscales
- BLF/BLA, SMS, Voicemail, Intercom
- 48 Keys including 16 programmable keys
- 6 VoIP accounts, Broadsoft/Avaya/Asterisk validated
- HD Voice; HD Codec, HD Handset, HD Speaker
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Top Customer Reviews
They all have a nice, heavy, solid feel. Everything fits and feels tight.
The screens are easy to read with a simple layout.
The speakers in the handset and speakerphone are high quality and sound very nice.
The operation is responsive and works great with all the features of our IP PBX systems... music on hold, transfer, conference, voicemail, etc.
There are several similar models... here's what you need to know about each.
NOTE: If it has a "P" in the model name, like T22P vs T22, then it supports PoE (Power over Ethernet). Which can be handy in some environments.
The T18/T18P is the lowest price model, but has no LCD display, so it has limited potential.
The T20/T20P has a basic display, 2 line buttons, and works great as a single endpoint phone for business or residential use.
The T22/T22P is really the best choice for a standard extension phone though. It has a slightly larger screen than the T20, 3 line buttons, and 4 context sensitive soft buttons. The soft buttons are very handy when used with an IP PBX system. But probably not important in a stand-alone situation.
The T26/T26P is the same as the T22, but adds 10 programmable buttons/lights for speed dial or extension/line status. It also supports a "sidecar" expansion module if necessary. Great phone for a receptionist or someone who needs to monitor line status... or just needs a lot of speed dial buttons.
The T28/T28P is like the T26, but with a larger screen and 6 call status buttons/lights instead of 3.Read more ›
Some of them randomly make a loud tone in the middle of a call, as if someone had pushed a number button and held it down for about 30 seconds. I called my voip provider (phonebooth.com) and was told that Yealinks do that all the time (Thanks for recommending them, by the way, phonebooth!).
Now a couple of them have had all (ALL) of the buttons fail. That means you push any button (number, control, line, volume, up, down, etc.) and nothing happens. All controls are dead. They still have dial tone, so that's nice. Would be much better if you could actually use the phone though.
I've tried to contact Yealink - no reply, no support, nothing.
Seriously, buy something else.
The phone was very simple to install, and the web interface is easy to use. The DSS keys support BLF for monitoring other extensions. I use this with a headset, and the sound is great there too. I would highly recommend this phone for someone who is looking for a simple yet professional deskphone for their sip phone system (like Asterisk). I have used it for 5 days now, and it works reliably without any problems. Far FAR easier to setup than Cisco 7960 phones, and more reliable than the 7960 in my experience (in an Asterisk SIP environment).
*Very simple, intuitive, straight-forward install. I think it supports tftp provisioning, but that is not required. I used the web interface.
*Excellent sound quality and clarity.
*BLFs work with other extensions.
*The phone just worked. Within 5 minutes I was done.
*Headset support is nice. (RJ9)
*Message lamp just worked (voicemail indicator), even with multiple SIP accounts.
*power supply included (but also supports POE).
*I like the fixed conference, hold, trans, mute, and redial buttons. The message and headset buttons light up.
*LCD screen is big and bright. The screen backlight turns off automatically (can customize the length of time before it turns off).
*The manual does a fair (but not great) job of really explaining the features, sometimes relying on the titles of the feature to explain what it actually does. For the most part the features are clear and you can intuit their meaning, but a more verbose manual would be appreciated.Read more ›
Most Recent Customer Reviews
I was pretty surprised when it didn't come with an AC adapter.Published 3 months ago by liquidvApor
no problems with this vendor but the handset has had issues with the screen in the past. If you unplug for a while then turn back on seems to work fine for a while.Published 4 months ago by antonio
I've deployed over a hundred of these and had very few issues. At this price point, you'd be hard pressed to find a SIP phone with more features.Published 5 months ago by Edward Holcroft
Good quality, functionality is flexible. Excellent management interfacePublished 9 months ago by Rez G
Does not come with power supply but Q/A says different on the product page. Correct the review or it feels misleading.
Q: Does this phone come with a power supply? Read more
The phone doesn't come with a power supply. So if you are in a hurry to get it up and running, this will ruin your day.Published 20 months ago by Fernando Mayr