By no means am I a tech expert but have a little experience. I am looking in to getting a new modem to combat renting one and slow wifi. But the cheapest new modem that supports voice and 150 mgbs internet is 130 dollars! The same modem but without voice is 80 dollars less! How?. Anyways i would like to know if i got an old TG862G or TG862R for the voice and got a seperate modem just for the internet could it work?. Would i need a coax splitter or more cables?
Using 2 modems depends on your local provider. Some allow this and some do not. Your best bet is to goto your local Service Center and speak with a representative to discuss your options.....
If I understand your question properly, the short answer is: "yes, but:"
Keep in mind the black box you rent from Comcast has at least two devices in it and serves multiple functions (this assumes a triple play service).
a cable modem to handle the incoming signal and a router to distribute that signal to your devices (including broadcasting the WiFi signal).
(this is a simplified explanation to keep it short)
Yes, You can replace this residential gateway with your own equipment so you do not have to pay Comcast a rental fee
1) you have to make sure the device you use is compatible with Comcast service
for example you mention a TG862G . The amazon listing for this device says:
"Arris Touchstone DOCSIS 3.0 Residential Gateway Wi-Fi 802.11n 4 Port Router, and 2 Voice Lines TG862G
Not Compatible with VoIP (telephony) Service with Comcast in Most Locations"
2) Having non-Comcast equipment opens you up to additional issues with Comcast if you have problems wit your service.
They will blame your equipment instead of fixing theirs. if you do not have Comcast problems then you would be fine.
but around here we have lots of Comcast problems (poor signal strength mostly)
and it is much easier to get Comcast to address these issues if you are using their equipment.
3) by renting the device from Comcast, if it breaks, they replace it, no problem.
Ya, it kinda bites to pay a rental fee, esp. since you fairly quickly pay more that the actual cost of the device
but it makes things easier.
I had two modems on my account for several years. One modem (rented) for voice and my customer owned modem for data. Never had an issue.
I have since replaced the rented Comcast voice modem for a Netgear CM500V which now functions for voice and data. Cost was $130.00. With the current rental fee of $11.00 the modem is paid for within a year. Even if I have to buy a new modem every two years I am still money ahead.
Comcast support for customer owned equipment is OK. But if Comcast says the problem is your modem then you have an issue. Best way to solve is to take your modem to another customer close to your house and connect. If the modem works then the problem is Comcast. If the modem does not work the problem is within your modem.