Guidelines For Integration; Apt/Dpt Or Inband Signaling; Why Integration Is Important; How The Vps And The Pbx Communicate - Panasonic KX-TVS50 Installation Manual

INTEGRATING THE VPS WITH PANASONIC KX-T PHONE SYSTEMS

3.1 GUIDELINES FOR INTEGRATION

3.1.1 APT/DPT or Inband Signaling?

There are 3 types of integration available on the VPS: Inband Signaling, APT and DPT. The
VPS used with any other brand of telephone equipment requires 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
• KX-TD500 Version Q171A or higher
Likewise, 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 may
not be able to utilize some of the features available only with DPT Integration (see
4.1.1 Why Digital Integration is Important). For more information, call National
Parts Center at 1-800-833-9626.

3.1.2 Why Integration is Important

The VPS 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.

3.1.3 How 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
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