Panasonic KX-TVS80, KX-TVS50 PBX Requirements for Integration, Single Line Tip/Ring Port Circuits

3.1 GUIDELINES FOR INTEGRATION

Table 8

VPS/PBX COMMUNICATION

DTMF Tones

The VPS must also have access to certain PBX features. For example, if the VPS takes a message, one way it can notify the mailbox owner is by dialing the PBX's Message-Waiting- Lamp-On code. Once new messages are retrieved, the VPS dials the Message-Waiting-Lamp- Off code for that same mailbox owner.

3.1.4PBX Requirements for Integration

The PBX must have certain capabilities and features to work with the VPS. (Although this section includes tests to help you evaluate the PBX, it may be necessary to refer to the PBX's documentation for detailed capability and feature descriptions.)

Single Line (Tip/Ring) Port Circuits

The VPS can only be connected to a PBX that supports SLT sets. Some PBXs need an OPX card to provide this connection. However, some OPX cards do not provide all the capabilities

listed in this section.

Following are the minimum current and voltages that the PBX must supply:

	Table 9
Minimum Loop Current	20 mA
Minimum Line Voltage	7 V DC
Minimum Ringing Voltage	40 V AC

Station to Station DTMF Signaling

For system users to access VPS services and features, they must be able to send DTMF tones from their telephones to the VPS port. As a general rule, SLT sets can perform station-to- station DTMF signaling; however, many proprietary telephones cannot. Some PBXs need to be programmed to make proprietary sets use DTMF signaling.

If the PBX does not provide station-to-station DTMF signaling, VPS services and features will be limited.

TEST:Call an SLT extension from the telephone in question. When the call is answered, see if the person receiving the call hears DTMF tones when numbers are dialed.

INTEGRATING THE VPS WITH PANASONIC KX-T PHONE SYSTEMS 43