I am working with a Vodia PBX and trying to get the phones to connect via TLS. I have a GRP2613 and a GRP2615. I have spoken with Vodia tech support and they believe it is because the system uses Letsencrypt and possibly the Grandstream does not support those certificates. Has any one else had this type of issues, or if Grandstream supports the use of Letsencrypt certificates? Let me know. Thanks.
