  Sonet and T1 Architectures for Digital Transport Networks [2nd Edition] (Hardcover) ISBN-13: 9780130654168 ISBN-10: 0130654167 Genre: Computers & Technology ?  Sonet T1 Architectures for Digital Transport Networks (Hardcover) ISBN-13: 9780134475905 ISBN-10: 0134475909 Genre: Computers & Technology ? |
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