Have a DDCB1A door box installed on a DK16. Replacing the 16 with a cix 40. I noticed the DDCB1A jumpers has a second pair punched down under the extension on the digital station. I am assuming this is a power pair. Can I install the DDCB1A on a cix 40 as the extensions are every pair. Does the cix 40 have a power pair. If not any options. Hope this makes sense as I have been unable to find a answer. Thanks.