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I currently have the Arris TG1682 for my cable modem and telephone modem in one as it is compatible with Cox voice.
I wish to purchase my own modems. What is the comparable equipment that can be purchased that would allow me to have my services? I know there is this link
But can I buy separate internet and telephone modems?
Any stand alone modem or gateway will work since you would be keeping the TG1682 just for phone service. All you would be buying is modem without the phone modem inside. It's up to you if you buy a separate modem and router or a combo unit.
I want to get rid of TG1682. What equipment other standalone equipment is out there for cox voice?
You can't buy a telephone modem compatible with Cox Voice. Only Cox can issue your telephone modem. It will be a free issue because Cox can't require you to pay or rent equipment for their telephone service. Any required equipment must be loaned to you.
If you bought the TG1682 from Cox, they may keep it provisioned on your account. If not, they'll loan you another telephone modem.