Using distinctive ring feature

[Carecomputers]

Hi All,

We are using the latest version of 3CX phone system v12 and are phones are Yealink T26P handsets.

My question is we would like to have our system use distinctive rings, in a nutshell we would like all external calls to be
one ring and internal calls to be another, if so what do I need to configure on 3CX Phone System and the Yealink phones
to get this to work.

Thanks in advance.

 

[bardissi]

http://www.3cx.com/blog/voip-howto/caller-id-processing-distinctive-ringing-alert-info/

 

[Carecomputers]

I have gone through the information from the link above but still can't get this to work any idea's where to start looking.