Panasonic KX-TVS50, KX-TVS80 Guidelines for Integration, 1 APT/DPT or Inband Signaling?

3.1GUIDELINES FOR INTEGRATION

3.1GUIDELINES FOR INTEGRATION

3.1.1APT/DPT or Inband Signaling?

There are 3 types of integration available on the KX-TVS50/80: Inband Signaling, APT and DPT. The VPS used with any other brand of telephone equipment require inband equipment. KX-TA624 that can use APT Integration is:

• KX-TA624 Version Y581A or higher

KX-TD series PBXs that can use DPT Integration are:

•KX-TD308 Version P871F or higher

•KX-TD816 Version P301O or higher

•KX-TD1232 Version P231U or higher

3.1.2Why Integration is Important

The KX-TVS50/80 works well with most PBXs because its connections are made through a standard single-line (tip/ring) telephone interface. However, the VPS operation depends on the capabilities and features provided by the PBX; its performance will vary when connected with different 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 correct mailbox and play the busy or no-answer greeting for that mailbox.

3.1.3How the VPS and the PBX Communicate

To the PBX, the VPS looks like SLT sets. The PBX thinks that the VPS is an SLT, and the VPS mimics 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 a hookswitch flash to put callers on hold and then dials the extension number. By recognizing call progress tones from the PBX, the VPS decides how calls should be handled. Inband Integration allows the PBX to send certain digits (DTMF) to the VPS, allowing it to recognize the status of the extension and take the appropriate action.

Table 8

VPS/PBX COMMUNICATION

PBX to VPS		VPS to PBX
Call Progress Tones		SLT Signals
•	ringback	•	on/off hook
•	busy	•	hookswitch flash
•	reorder	•	DTMF tones

42 INTEGRATING THE VPS WITH PANASONIC KX-T PHONE SYSTEMS