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Contributor
szeet
Posts: 20
Registered: ‎05-05-2012
Accepted Solution

Why Does My arris T862 router\modem\ Need a battery?

I'm a new Comcast Internet subscriber.  Earlier this week comcast installed a xFinity Arris T862 router\modem.

Why does it need a battery?  Sometimes, I'm not home for extened periods before leaving I unplug most everything. Can i remove the battery from the T862?  Why waste energy charging it?

My old LinkSys I just removed the power cord at night and before traveling.

Contributor
szeet
Posts: 20
Registered: ‎05-05-2012

Re: Why Does My arris T862 router\modem\ Need a battery?

Reading the online manual I see the battery is for VOIP which i don't yet have.

Cable Expert
i-am-nerdburg
Posts: 5,268
Registered: ‎06-27-2009

Re: Why Does My arris T862 router\modem\ Need a battery?

Yep, telephony modems have a battery back-up. If you don't have digital voice, you can just take it out. Frankly, as far as I can tell, the whole battery thing is just for marketing. If the power goes down, your cable will probably go down too and you would have to have a corded phone that draws its power from the phone line for it to work anyhow.

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Connection and trouble shooting tips (How to check signal levels.) . Info you should post to get help.
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Connection Expert
EG
Posts: 34,270
Registered: ‎12-24-2003

Re: Why Does My arris T862 router\modem\ Need a battery?

[ Edited ]

How about the strand (pole) mounted battery backups, the portable field generators that can be trucked in, and the emergency power backup generators at the headend ?

Cable Expert
i-am-nerdburg
Posts: 5,268
Registered: ‎06-27-2009

Re: Why Does My arris T862 router\modem\ Need a battery?

Eh, it's all kind of hit and miss in my experience.      

------------

Connection and trouble shooting tips (How to check signal levels.) . Info you should post to get help.
The opinions expressed here are my own and are not sanctioned by my employer.


Cable Expert
JayInAlg
Posts: 10,459
Registered: ‎03-02-2007

Re: Why Does My arris T862 router\modem\ Need a battery?

At least Comcast has battery backup in the field unlike Mediacom.  No batteries for them.

 

P2040423.jpg

Connection Expert
EG
Posts: 34,270
Registered: ‎12-24-2003

Re: Why Does My arris T862 router\modem\ Need a battery?


i-am-nerdburg wrote:

Eh, it's all kind of hit and miss in my experience.      


Understood Steve ! We know how every separate franchise / market area has their marked differences !!

Contributor
szeet
Posts: 20
Registered: ‎05-05-2012

Re: Why Does My arris T862 router\modem\ Need a battery?

If I don't see a battery backup on the pole I assume my cable power isn't backed up.

I'll remove the internal battery.

 

The battery cover has the following message on it:

"After battery installation, do not remove battery unless instructed by comcast.

To reset this device use the reset button"

 

The mfg's manual has no warning about removing the battery:

http://www.arrisi.com/support/documentation/user_guides/_docs/TG862G-NA_User_Guide_Standard1-3.pdf

 

 

Contributor
szeet
Posts: 20
Registered: ‎05-05-2012

Re: Why Does My arris T862 router\modem\ Need a battery?

Is it routine for Comcast to truck in emergency power?  I've never seen it in my neighborhood.

Cable Expert
i-am-nerdburg
Posts: 5,268
Registered: ‎06-27-2009

Re: Why Does My arris T862 router\modem\ Need a battery?

Yes, when I worked for Comcast we had a number of back up generators. The battery back-ups we had were only good for a few hours, so once in awhile we would roll the generators out. The generators got stolen all the time, despite being chained to the pole. That was awesome.

------------

Connection and trouble shooting tips (How to check signal levels.) . Info you should post to get help.
The opinions expressed here are my own and are not sanctioned by my employer.