I have a grandstream HT 503 ATA which seems to support TLS/SRTP. I
generated the keys and certificates for both the server and the device
as mentioned at
I then copied the grandstream.crt and grandstream.key over to the ATA.
Unfortunately, the device is refusing to register and in asterisk cli
SSL certificate ok
== Problem setting up ssl connection: error:14094410:SSL
routines:SSL3_READ_BYTES:sslv3 alert handshake failure
Is there something which i am doing wrong?