Choosing right RJ45 phone cord type for 2GIG POTS wiring

Looking to wire POTS line to 2GIG POTS module with RJ45 jacks on both ends. Do I use straight or crossed cord connecting the RJ31 jack to the POTS module? Thanks.

We are an service provider, we provide support for systems that connect to service over cellular and/or broadband, not POTS.

I would try reaching out to 2GIG directly for support with this:

Have a great day!