Which API at CUCM to use? TAPI or WebDialer?

My scenario as following,

jabber --- CUCM --- DX80

                    |

                    |

             AP Server

The requirement is to make call between jabber and DX80 but from AP Server to initial make call request to CUCM.

Because this is a special solution for customer need that have to initial call from AP server.

I plan to write some code at AP server to send make call information to CUCM.

Which API at CUCM should I use? TAPI? WebDialer?

If all you need to do is initiate the call, then WebDialer is probably the way to go - and is much easier.  If you need more control over the call - hang-up, auto-answer, transfer - or need real-time call-progress events, then you will need to try TAPI/JTAPI.