VoIP Lines from Comcast Business into FreePBX server?

I have a small retail business with 2 voip lines from Comcast Business. I have a Grandstream but its garbage, keeps needing to be rebooted etc. Im going to build an i3 PC and bought a samgoma B600 analog card with FXO ports on it to run FreePBX. I believe I can use my existing Grandstream IP Phones with FreePBX.

Is that the right way to go or is that inefficient or wrong in some way?

Thanks in advance!

If you’ve got SIP truck from Comcast why wouldn’t you just use that sip trunk directly instead of converting to analog and then using the FXO card to convert back to SIP? If they are providing you with a trunk and two DID’s that’s all you need.

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