[Algo Door box]

To whom it may concern, 

We are trying to connect an Algo 8028 Sip device to a customer of ours and we cant seem to get it to work. The Customer is L&M. I have tried to create this device as a VOIP Device as well as a SIP URI and a Softphone with no connection from any of them. I do not see a BYOD option. I have entered in the SIP credentials, authentication ID and password. I gave the doorbox an extension of 555 and set it to dial 500 which is my main callflow group. When I press the doorphone button I hear ringing, but the phones are not. Has anyone ever set one of these up before and if so can you guide me into doing this? 

[Different Ring tones]

Does anyone know if we can have different ring tones for internal calls and external calls on a Yealink T41P?