Hello Efthimi!
Unfortunately the only GW in the 4630 series that currently have a template for is the 4638. As we have worked with Patton to acquire their templates, we suggest you contact Patton directly and request a Template for the SN4634 that will work with 3CX Phone System.
Keep in mind however that using any Template that doesn't come with the 3CXP Phone System is not supported.