which product should choice?

We have 4 pstn phone line with a hunting pbx system, if we set a ippbx, how can we migrate into existing system & what product item we need to install?

could you descript your requirement more clearly? such as how many extensions you want, what kind of pstn line you are using etc.

We're using hunting line with 4 pstn line into office pansonic hunting pbx + 10 handset extension, as below description, all incoming phone line will join into "elasix" with "IVR" & to enable voice message box, we want to keep existing extension to hunting pbx & all others new extension will create at IPPBX system but both can communicate together & dial out too.

Our idea is all incoming pstn line -> ippbx -> ivr ->ippbx extension (e.g. ext. 110 - 130) or -> hunting pbx -> extension (e.g. 100 - 109). ->all can dial out & dial intercom + voice message enable

Is it possible work?

You can use a 4*FXO+4*FXS card to make your system.

The 4*FXO are used to connect PSTN, and the 4*FXS are used to connect your panasonic.

We have several model that suit your requirement:

A1200P0404, A800P44, or 1*A400P40+1*A400P04.

Both can make 4*FXS+4*FXO system.

Thanks, is it needed to add RJ11 splitter for handset or panasonic pbx collection?

By the way, if we change phone line incoming by DDI method, what's model we should pick? And what's hardware requirement for "Elastix" is needed? And also, would it available combine with hunting line + DDI line into a system? If so, what's model will need?

Are you still keep using traditional PSTN line, just add DDI function on to it? If yes, any A series cards can fit your usage.

For the splitters, it depends on model, each A1200P need 1 pcs sp140, each A800p need 1pcs sp141.