1 EXHIBIT 21.1 SUBSIDIARIES OF THE REGISTRANT JURISDICTION OF INCORPORATION OR ORGANIZATION ---------------- SUBSIDIARY COUNTRY ----------------------------------------------------------------------- CoSine Communications Australia Pty Ltd Australia CoSine Communications Belgium Sprl Belgium CoSine Cayman Ltd. Cayman Islands CoSine Communications Finland OY Finland CoSine Communications SARL France Company Communications Deutschland GmbH Germany CoSine Communications Hong Kong Ltd Hong Kong CoSine Software (India) Private Limited India CoSine Communications Italia Srl Italy CoSine Communications KK Japan CoSine Communications Malaysia Sdn Bhd (formerly Malaysia Aspen Sehijau Sdn Bhd) CoSine Communications BV Netherlands CoSine Communications Singapore, Pte Ltd Singapore CoSine Communications Espana SL Spain CoSine Communications Sverige AB Sweden CoSine Communications Ltd United Kingdom PAGE 58 OF 59