TOKYO, Nov. 12 -- Calient Networks, which develops intelligent, all-photonic switching systems, has begun pre-deployment staging for Japan Telecom's all-optical switched network. After a year of joint network design and testing, the companies are moving into end-to-end network configuration and interoperability staging with Calient's DiamondWave system, its generalized multiprotocol label switching (GMPLS) protocol code stack and Cisco Systems' GSR routers. The work is expected to be completed in late December. Calient also announced the first contract sale of its DiamondWave photonic switch, to Oki Electric, which will be Calient's primary OEM sales channel in the Japanese marketplace. Oki has already secured orders of several nodes for evaluation systems from two major Japanese carriers, Japan Telecom Co. Ltd. and KDDI Corp.