Last week our old ISDN PABX broke down beyond (reasonable) repair. So we scrambled to get the parts together to have it replaced by a 3CX setup. We used the following components: - Win 2003 STD Server (Virtual Machine) - 3CX (currently free edition - ordered PRO16 edition) - A bunch of Linksys SPA 942's and P962's - Patton SmartNode 4634 3 BRI (3XISDN) VOIP Gateway (Model SN4634/3BIS - Software version R5.2 2009-01-14 H323 SIP BRI - Hardware version 1.11) We got everything basically working with a regular ISDN2 line (we plugged it into either BRI 0/0, 0/1 and 0/2). It can dial out over ISDN and receive calls over ISDN. The problem however is when we hook it up to the ISDN2 lines where it needs to work: There are three NT1 ISDN2 connection boxes available. Two of them are 'bundled', so from the point of view of the caller we have 4 lines with the same telephone number. We can physically connect both NT1 boxes with BRI 0/0 and 0/1, however they do not work due to the 'bundle'. The remaining 'regular' NT1 ISDN2 line (different number) works without a problem. Does anybody have an idea how to configure the Patton to work with the bundled ISDN2 lines? Btw, we are located in the Netherlands and KPN provides the ISDN2 lines.