Acme Packet got approval from Japan’s second largest service provider, KDDI, this week to announce their two-year long relationship for session border control of KDDI’s Centrex voice-over-IP service.

KDDI is Acme’s third major customer to be announced in the region. The session border controller (SBC) provider also does business with NTT and Fusion Communications.

“Service providers in Asia Pac and Japan specifically are pretty aggressive and innovative in using new technologies and deploying new services, so it’s been a good place of business for us,” said Kevin Mitchell, director of solutions marketing at Acme Packet.

Tokyo-based KDDI is using Acme packet’s Net-Net SBC to meet the high availability, security and service assurance requirements for its wireline VoIP network for residential customers.

KDDI provides mobile phone service, mobile Internet services, local, long distance and data communications services over its fixed line network. The NAT/firewall traversal capabilities and the VLAN support couple with features such as access control, topology hiding at both Layer 3 and Layer 5. The solutions also protects against denial-of-service (DoS) attacks.

Acme said its Net-Net product family has been selected by 210 service providers, including 21 of the top 25 wireline and wireless providers in the world.

“We are in the access border helping them with multi-protocol support, since we support SIP, H.323, MGCP and the interworking between SIP and H.323,” Mitchell said. “That ensures they can connect to all the devices in the network supporting these various signaling protocols.”