Removing equipment

@Olgaoberto 

This is not a Digital Life DLC-100. This may be your AT&T internet interface box. I am not familiar with the method of removing this box. I will move this post to the AT&T Internet forum where they may better assist you.

What is pictured is a Power Supply / UPS for an externally mounted ONT, the fiber Internet connection.

Hi. I consulted with my internet team which is also from AT&T and they said it’s not part of the internet. I have these 3 devices I need to remove

This one seems to be supplying power to the one with the antennas 

and last this is in my garage

The middle photo I can see the model is a DLC 100 which another user asked how to remove it in this topic also the manual and users guide can be found with an Internet search. I can't read the model of the other two, but they are most likely all related. If you don't want to remove them yourself, contact an electrician or low voltage contractor. So, you may not have posted than photo when @ATTDigitalLifeCS posted.

Thank you I do not know too much about this forum and when I posted first I did not see the option to upload all pictures. 
The dc100 and the one connected to the outlet are together but the other equipment is in my garage. I unfortunately do not have the manual as it came with the house I recently bought. 
I only found one online which doesn’t have the way to remove it. Could you help me with some instructions? Thank you 

@Olgaoberto 

Good morning,

I do not know which other devices you may have installed so I will just give you the basics for removal. We do not take responsibility for any damage you may cause while removing your devices. 

To remove your DLC-100 main controller, follow these steps:

1. You will need a five-star security screwdriver to remove the screw at the very top left of your DLC-100.
2. Once you remove this screw you will be able to open the main panel and disconnect your Ethernet cable which goes to your router.
3. Once your Ethernet cables have been disconnected, you should be able to slide the entire DLC-100 main controller up approximately 1 inch and pull towards yourself.
4. You will then need to remove the Ethernet cable which you disconnected in step two, from the DLC-100 main controller.
5. Sit the main controller to the side and you are ready to remove the mounting bracket.
6. The mounting bracket is secured to the wall with several Phillips head screws. Once you remove the screws you have completed the removal of your DLC-100 main controller.

To remove the smaller Digital Life power block:

1. Disconnect the power block from the AC power receptacle.
2. Slide the power block upwards and away from the wall.
3. Remove the Phillips-head screw on the back at the top of the power block.
4. Disconnect the two ethernet cables.
5. The two ethernet cables appear to have been run through your electrical outlet.
6. FOR YOUR SAFETY, CONSULT AN ELECTRICIAN OR QUALIFIED CONTRACTOR TO ACCESS THE OUTLET IF YOU ARE NOT QUALIFIED TO WORK WITH ELECTRICAL CURRENT. 

To remove surface contact sensors, follow these steps:

The surface contact sensors and accompanying magnets should be secured to your doors and/or windows with double-sided tape. On rare occasions, some surface contact sensors may have a small screw to reinforce the mounting of your sensor.

1. To remove the contact sensor cover, insert a small flat-head screwdriver into the small indentations on the side or bottom of the contact sensor and twist to remove the cover.
2. If there is a screw securing your contact sensor to the surface, simply remove the screw.
3. Now you should be able to remove the contact sensor from the wall by carefully removing the double-sided tape securing the contact sensors and magnets to the surface.

I hope this information was helpful.

The third picture is the same as the original, and since you said it's in the garage, that really reinforces that it is the Power Supply for an external ONT for Fiber Internet service.   See this article

https://www.att.com/support/article/u-verse-voice/KM1045809/

where it is labeled Delta 1.

Those are no longer installed for new service, fiber is normally brought into the home instead of terminating the fiber outside in an outdoor ONT.

Do you have AT&T Fiber Internet, i.e. is this potentially in use?

I only have a regular router inside the house. I do not think this is in use. I was never advice it was. 

I only have a regular router inside the house.

What do you mean "regular router?"  A model number would help.

How is this "regular router" connected, e.g. does it have an Ethernet cable plugged in to a Red jack on the back?