what is the silver cartridge

what is the silver cartridge on back of Comcast router? Looks like a silver AA battery

Looks like an MoCA filter.

Edwin said:

Looks like an MoCA filter.

>>Thank you sir.
May I ask, does it prevent intrusion from my neighbor?
Is there an extra fee?
Do I need it?
I appreciate your cooperation.

maranna said:

>>Thank you sir.
May I ask, does it prevent intrusion from my neighbor?
Is there an extra fee?
Do I need it?
I appreciate your cooperation.

Not sure..., was just a guess on my part!

If your cable company installed it, it's probably best to leave it.

Call them, they'll probably give you all the info you need.

Thank you will do

Bastet said:

It may be an attenuator, I have one on my router as my cable supplier said the signal was too strong & was affecting other subscribers.

>>It appears it has to do with the ISP and interference somewhere. Thanks and I'll leave it alone.

Look at the blue band label on it. It says filter on it, I believe.

NavyLCDR said:

Look at the blue band label on it. It says filter on it, I believe.

>>Yes the little I could read it does say filter. What is its function and do I need it?