ntt com asia limited (ntt ca) is a wholly owned subsidiary of the world's bigger telecom carrier, ntt com, provides full range of telecom-related services in hong kong since 1995. ntt com asia networks systems (guangzhou) company limited is an operation arm of ntt ca in handling regional projects in china. the guangzhou office provides one-stop systems integration solution to customers since 2003, offering comprehensive services include it consultancy, project management, outsourcing, technical and customer support. you can visit our website for more reference: www.ntt.com