OVPN client on Grandstream phones

Initial data:
192.168.0.1/24
192.168.0.0
Ovpn server: 192.168.0.1:1194
Protocol: TCP

Using these settings, OVPN works:





Note: it works only with Blowfish encryption, without compression.

Additional options in the settings of the Grandstream phone,
do not forget about the route:

client;
dev tun;
resolv-retry infinite;
nobind;
tls-client;
auth SHA1;
route 192.168.0.0 255.255.255.0