INTEGRATING THE VPS WITH PANASONIC KX-T PHONE SYSTEMS40 Installation Manual3.1 GUIDELINES FOR INTEGRATION3.1.1 APT/DPT or Inband Signalling?There are 3 types of integration available on the VPS: Inband Signalling, APT and DPT. TheVPS used with any other brand of telephone equipment requires inband equipment.KX-TA series PBX that can use APT Integration is:• KX-TA series Version Y581A or higher.KX-TD series PBXs that can use DPT Integration are:• KX-TD816 Version P301O or higher.• KX-TD1232 Version P231U or higher.NoteDepending on the model and/or the software version of the connected PBX, you may notbe able to utilise some of the features available only with DPT Integration (see4.1.1 Why Digital Integration is Important). For more information, consult your dealer.3.1.2 Why Integration is ImportantThe VPS works well with most PBXs because its connections are made through a standardsingle-line (tip/ring) telephone interface. However, the VPS operation depends on thecapabilities and features provided by the PBX; its performance will vary when connected withdifferent PBX systems. For example, Follow-on (or Called Party) ID is a feature of the PBX.If the PBX does not have this feature, the VPS cannot transfer calls directly to the correctmailbox and play the Busy or No Answer greeting for that mailbox.3.1.3 How the VPS and the PBX CommunicateTo the PBX, the VPS looks like SLT sets. The PBX thinks that the VPS is an SLT, and the VPSmimics all actions a live attendant would carry out from an SLT.For the VPS and the PBX to communicate, proper signalling is important. Like an attendant,the VPS places calls by going off-hook and dialling numbers. It starts call transfers with ahookswitch flash to put callers on hold and then dials the extension number. By recognisng callprogress tones from the PBX, the VPS decides how calls should be handled. Inband Integrationallows the PBX to send certain digits (touchtone) to the VPS, allowing it to recognise the statusof the extension and take the appropriate action.
