Alcatel 4039- headset plus add-on modules.

[davidrunciman]

Hello, we have a client that has a 4039 set for the receptionist, and this set has 2 add-on modules ( 40 programabble keys each). The client purchased a wt100 savi talk with Apa-20 cable.
The normal installation goes with the Apa-20 with the rj12 connector and the 3.5 audio jack, the headset works great. But, the receptionist has 2 add-on modules, and we can't use the connector of the Apa cable because we need it for the add-on modules (the idea is that receptionist has headset and the add-on in the same set)
What can we do with this kind of problem, is there any other accesory they can use? Any help would be appreciated.