Guidelines For Integration; Dpt Or Inband Signalling; Why Integration Is Important; How The Vps And The Pbx Communicate - Panasonic KX-TVP200 Installation Manual

INTEGRATING THE VPS WITH PANASONIC KX-T PHONE SYSTEMS

3.1 GUIDELINES FOR INTEGRATION

3.1.1 DPT or Inband Signalling?

There are 2 types of integration available on the VPS: Inband Signalling and DPT. The VPS
used with any other brand of telephone equipment requires inband equipment.
KX-TD series PBXs that can use DPT Integration are:
• KX-TD500 Version Q211AB or higher
• KX-TD816 Version P301O or higher
• KX-TD1232 Version P231U or higher
Note
Depending on the model and/or the software version of the connected PBX, you may not be
able to utilise some of the features available only with DPT Integration (see 4.1.1 Why
DPT Integration is Important). For more information, consult your dealer.

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 signalling is important. Like an attendant,
the VPS places calls by going off-hook and dialling numbers. It starts call transfers with a
hookswitch flash to put callers on hold and then dials the extension number. By recognising
call progress tones from the PBX, the VPS decides how calls should be handled. Inband
Integration allows the PBX to send certain digits (touchtone) to the VPS, allowing it to
recognise the status of the extension and take the appropriate action.
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