00467nam a22001577a 4500003000500000005001700005008004100022020001800063040000600081082001700087100001900104245011100123260004100234300001300275650002100288CEME20210628203124.0210222b        xxu||||| |||| 00| 0 eng d  a3-7785-2527-1  c.  a621.3815 KIE  aKiefer, Roland  aTest solutions for digital networks, basic principles and measurementtechniques for pdh, sdh, isdn and atm  aUSAbHUTHUNG VERLAG HEIDELBERGc1997  aXII,282P  aDIGITAL NETWORKS