Kx-td 816 and hacking

[b106]

Hello All
KX-TD816 with TVP 50
Been reading posts on systems being hacked to fraudulently make calls
By default transfer to outside party is disabled and call forward to outside party is disabled
Is this enough ?
Should I change the cos of the VM ports to cos 8
Thanks in advance

 

[obtsystems]

cos 7 is all calls barred, and yes you should as they could set up a mailbox to make calls

 

[b106]

Thanks for that obtsystems