Will this phone function without a power supply (that is, just plugged into the phone jack) or do some functions require ac power source?
590349
It does take batteries in the event of power loss but I don't believe it will be functional once the batteries die
590350
It will work to receive calls without the power supply plugged in, and if I recall correctly, you can also make outgoing calls. The display is blank without a power supply plugged in. I don't remember if the caller id directory shows the history for the period when the phone was unplugged.Regards, Dan
590351
You can make and receive calls without the power supply plugged in. The screen will not light up, so caller ID will not work. Not sure about some other functions.
1591501
Yes. It gets the power from the phone company line, ie no external power adapter. Unless the phone company is down, ie rare, it should continue to work in case of a power outage. I specifically bought it for that purpose as well.
971236
As long as your phone would still work. Conventional phone lines (ring & tip) work without AC power. Cable modem/internet phone needs to have some type of battery backup so that you can still make & receive calls. The Freedom alert is battery backed up and will work if power is out as long as your phone line is operating. Freedom alert also monitors its' battery condition and puts out a call to change the battery when needed. Two Batteries are included so one is recharging while the other is in use. It's great!
164375
No, I bought it for the same reason. I have the Galaxy 4s, I believe it requires a power supply. Just use old faithful, laptop.
1742667
No external power source required. I added the required AA batteries in order to keep the call memory intact. However, if you want this as a wall phone, you are wasting your money. The receiver does not stay in the cradle.............
1808072
Yes. These phones are typically powered by a PoE switch, so no power supply is necessary. If you don't have a PoE switch to supply power over the ethernet cable, you will need to purchase a power supply to power the phone.
452025
It can be operated with only phone line power, but batteries are needed for anything other than ordinary telephone operation, e.g., speakerphone, memory calling. It does not have an external power supply.
745683
The beauty of this highly capable phone is that it does not need a power outlet. simply plug thee telephone jack into the tel wall outlet and you are set!!! Happy Phoning!
2113235
No external power supply on this unit. Just a regular 2 prong plug straight from the unit.
1717628
I have not tried to use the phone without batteries. However, looking at the manual, it does seem to imply that the batteries need to be in place to use a headset. The phone itself will work without batteries, but some of the features won't. You can see the entire manual here: http://service.us.panasonic.com/OPERMANPDF/KXTS105B.PDF The phone does not come with an AC adapter, so power outtages will not affect it one way or the other.
1384200
no you have to plug it into a power source. that's the only way it will work.
1679092
No it uses the power port on the phone. If thats not working for you this will not work.
857518
Not 100% sure. It does have a jack for an AC adapter, although doesn't come with one. I am not using one and am running it to connect my TV to a satellite receiver and a ChromeCast. It works great for me without external power.
1050716
I don't believe its functionality is tied to the brand or OS of a phone. Don't quote me on that but directly plugging it into any phone's jack should get you up and going.
800792
There is a micro usb cord (included) that clips into the chassis to provide power to the phone. So, in effect, yes it can power the phone.
923190
That description about "2 non-standard batteries" appears to be in error. The manual for this phone is available at http://cdn-media-att.vtp-media.com/ecp/documents//product_Product/1889//8359/CL4940_UM_6.pdf. If you look through the manual carefully, you will see that it specifies a power adapter, but makes no mention of batteries. On page 13 of the manual, it says: This telephone provides minimal functionality during a power failure. When AC power is not available, the screen is blank and many telephone features do not function. Only touch-tone dialing and handset volume adjustment are supported. The telephone uses power from the telephone line to enable you to make and answer calls using only the handset and dialing keys.
1249488
No. It has no batteries to use for a backup. So if the power quits, so does the phone