HP 480-0005-00-15 manual Off Premises Exchange OPX, Figure A-3 OPX Example

Appendix A: Getting Acquainted with Tenor CMS in the VoIP Network

Off Premises Exchange (OPX)

The Off Premises Extension (OPX) application is essentially an “add-on” to the Enterprise application. OPX stands for Off-Premises Extension (or Exchange), which usually means that the phones (and/or fax machines) terminate somewhere else other than where the PBX resides. The Intercom Dialing Feature enables you to achieve this functionality for multiple extensions.

Several benefits to OPX include the following:

•Allows unlimited number of remote sites connectivity to an organization’s main phone network.

•Eliminates PSTN call charges within the network.

•Allows 4 digit dialing to all points throughout the network.

•Reduces the need for having a PBX at all sites.

•Central point of origination of Outbound PSTN calls.

Figure A-3displays a scenario that will enable the people in the satellite office to be connected to the people in the main building and to the “outside world”, even through their building does not have actual PSTN lines or a resident PBX. In addition, the people located at headquarters can dial the people at the Remote site using a 4 digit Private Dial Plan.

Figure A-3 OPX Example

CMS
PSTN
PBX	Analog Tenor
IP Network	Remote Site
Headquarters	(OPX)

P/N 480-0005-00-15 A-7