Librería: liu xing, Nanjing, JS, China
paperback. Condición: New. Language:Chinese.Pages Number: 358 Publisher: Electronic Industry Publishing House Pub. Date :2004-11. IP phone system from birth 10 years ago has been subject to people s attention. and gradually affect people s lives. its technology and applications are constantly changing. With the development of soft-switching systems. IP telephony applications and the application model has reached a new height. This book systematically and comprehensively describes the soft-switching systems and related . Nº de ref. del artículo: J52772
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