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Combination of PJP-50USB + softphone
An IP-PBX and SIP server can assign extension numbers to each PJP-100H and PJP-50R. You can call other conference participants by dialing their extension numbers instead of their IP addresses.

No matter what floor, conference room, or desk, as long as you use the same network you can use the same extension number even when the IP address changes.

Using the VS-32 (an SV8500 peripheral) which controls multipoint connections, you can hold conferences with up to 32 locations simultaneously.

An IP-PBX and SIP server connect with external lines to enable participants to join a conference through the telephone, without needing audio conferencing system terminals.

Notes on linking with UNIVERGE
Links
UNIVERGE Certified page(Japanese)
http://www.nec.co.jp/univerge/univergepartner/product/100250/100250_1.html
Firmware with UNIVERGE SV7000 support
Support for UNIVERGE is included on firmware versions 2.04 and 2.02 for the PJP-100H and PJP-50R respectively. Firmware versions prior to these will not work-please download the latest firmware at the following URL.
http://www.yamaha.co.jp/english/product/projectphone/support/download/firmware/index.html
Firmware with UNIVERGE SV8500 support
Support for UNIVERGE is included on firmware version 2.10 for the PJP-50R.Firmware version prior to this will not work-please download the latest firmware at the following URL.
http://www.yamaha.co.jp/english/product/projectphone/download/firmware/index.html#pjp50r