International Rice Research Institute (IRRI)

International Rice Research Institute (IRRI)

International Rice Research Institute (IRRI)

To link the main office building and staff housing through installation and deployment of an Asterisk-based PBX system


The International Rice Research Institute (IRRI) is a non-profit independent research and training organisation that develops new rice varieties and rice crop management techniques. IRRI has its headquarters in Los Baños, Laguna, Philippines and holds offices in seventeen countries. They needed a telephone system to accommodate the huge number of staff receiving and accepting international calls.


IRRI is spread across multiple buildings on and off the campus of the University of the Philippines Los Baños (UPLB) as well as the staff housing and apartments (Pleasant Village Apartments, Guesthouse and Forestry Apartments). Aside from the main building, the IRRI wants these facilities to be connected to the PBX system and the IRRI WAN. Analog phone lines used to call in and out of Los Baños need to be connected to an FXO and T1/E1/PRI gateways for the existing PRI line to accommodate phone calls to and from Metro Manila. The Asterisk server needs to be integrated to Elisha Telecom’s SIP gateway while IRRI can still use their own E1 lines for IDD calls. VoIP phones with high-compression codecs such as G729 are needed to minimise bandwidth consumption and ensure call quality.


Each building is interconnected via a fibre network and analog extensions were connected using the existing FXS gateways already deployed in the various buildings and are ready for configuration. Existing copper phone lines already connect the Forestry Apartments to the Guesthouse so the lines are used to connect the Apartments to the PBX system with the FXS gateway powering these lines located in the Guesthouse building. The 24 analogue extensions in the Pleasant Village Apartments were linked via a Wi-Fi bridge and high compression codecs were installed.

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