CASE STUDIES

Objective

To implement a Mitel VoIP phone system to replace their previous analog PBX in Tokyo.

• 2x KVH PRI trunk connection to the Japan PSTN
• 200 Mitel IP phones for staff based in Tokyo

Solution

Denphone assisted Australia based Ethan Group to install a two server Mitel based PBX system in the Robert Walters Tokyo office. Connections were made to the KVH Phone network via two PRI ports. 200 Mitel IP phones in two separate buildings were connected to the PBX Servers.

Objective

To implement an Ericsson VoIP phone system to replace their old analog PBX in Shiga prefecture.

• 2x INS1500 PRI trunk connection to the Japan PSTN
• 200 Ericsson IP phones for staff based in factory and office
• 2 PRI port Voxstream J1-E1 gateway

Solution

Denphone assisted HP/Damovo/NPV in the installation of a two server (primary/hot standby) Ericsson based PBX system. Connections were made to the NTT Phone network via a PRI card. 200 Ericsson IP phones were connected to the MX-ONE Servers, and a Voxstream 2 port PRI gateway was used to connect to NTT INS1500 lines. Analog devices were also connected to the MX-ONE unit.

Objective

To implement a VoIP capable phone system to replace their old expensive analog PBX in Tokyo.

• INS1500 PRI trunk connection to the Japan PSTN
• INS64 BRI ISDN backup connection to the Japan PSTN
• 220 Cisco IP phones for staff based in Tokyo
• 24 port Audiocode analog gateway

Solution

Denphone installed a three server load-balanced Asterisk based PBX system in the UNU Tokyo office. Connections were made to the NTT Phone network via a PRI card. 220 Cisco 7941 IP phones were connected to the Asterisk Servers, and an Audiocodes 24 port analog gateway was used to connect to six internal PBXs in other small offices in the building. Analog devices were also connected to the Audiocodes unit.

Objective

To connect an Asterisk system to a large data centre based phone switch.

• INS1500 PRI connection to a large phone switch

Solution

Denphone analyzed the protocol differences between the Asterisk PRI implementation and the phone switch PRI implementation. The Asterisk driver was modified to resolve the mismatch and enable the two systems to route calls.