1 | | Softswitch Design and Performance Analysis : Cost Effective Telecommunication Network Architecture / Md.Arifnoor Chowdhury . - Deutschland : LAP LAMBERT Academic Publishing, 2010. - 58 p. ; 22 cm Mã xếp giá: 621.382 C5Đăng ký cá biệt: Lầu 2 KLF: 2000008341 |