I HAVE A CUSTOMER WITH A DK40I system with an expansion unit and an ivp8 installed into slot 17 and a kcdu installed into slot 15 i am trying to install a pdku2 into slot 16 but when doing so the voicemail stops answering calls in both autoattendant mode or by trying to pickup messages.

can somebody assist in finding out whether i have a slot contention problem or this system has reached its port limitation. I should be able to install this card as the base cabinet has 8 digital stations and 4 co lines. The base may have some single line ports but not sure.