3.1 GUIDELINES FOR INTEGRATION64 Installation Manual3.1 GUIDELINES FOR INTEGRATION3.1.1 DPT or Inband Signaling?There are 2 types of integration available on the VPS: Inband Signaling and DPT. The VPSused with any other brand of telephone equipment requires inband equipment.KX-TD/KX-TDA/KX-TAW series PBXs that can use DPT Integration are:• KX-TD500 Version Q171AA or higher• KX-TD308 Version P871F or higher• KX-TD816 Version P301O or higher• KX-TD1232 Version P231U or higher• KX-TDA series Version 1.0 or higher• KX-TAW series Version 1.0 or higherLikewise, the KX-TA1232 can also use DPT Integration:• KX-TA1232 Version P831AA or higher (all versions)Notes• To the VPS, the KX-TA1232 looks identical to the KX-TD1232.• Depending on the model and/or the software version of the connected PBX, you maynot be able to utilize some of the features available only with DPT Integration (see4.1.1 Why DPT Integration is Important). For more information, call National PartsCenter at 1-800-833-9626.3.1.2 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. Ifthe 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 signaling is important. Like an attendant,the VPS places calls by going off-hook and dialing numbers. It starts call transfers with ahookswitch flash to put callers on hold and then dials the extension number. By recognizingcall progress tones from the PBX, the VPS decides how calls should be handled. InbandIntegration allows the PBX to send certain digits (touchtone) to the VPS, allowing it torecognize the status of the extension and take the appropriate action.
