LEADER 00920nam0-22003131i-450- 001 990000267680403321 005 20001010 035 $a000026768 035 $aFED01000026768 035 $a(Aleph)000026768FED01 035 $a000026768 100 $a20001010d--------km-y0itay50------ba 101 0 $aita 105 $ay-------001yy 200 1 $aEquazioni della fisica matematica$f(di) Andrej N. Tichonov e Aleksandr A. Samarskij. 210 $aMosca$cEdizioni Mir$d1981 215 $a750 p., ill., 22 cm 300 $aTit. Orig.: Uravnenija matematicasko i fiziki 676 $a515 700 1$aTichonov,$bAndrej N.$013601 702 1$aSamarskii,$bAleksandr Andreevich 801 0$aIT$bUNINA$gRICA$2UNIMARC 901 $aBK 912 $a990000267680403321 952 $a04 012-67$bIRC 1504/L$fDINCH 959 $aDINCH 996 $aEquazioni della fisica matematica$9118643 997 $aUNINA DB $aING01 LEADER 02013nam 2200373 450 001 996279862403316 005 20231208073817.0 010 $a0-7381-4139-9 024 7 $a10.1109/IEEESTD.1988.81611 035 $a(CKB)3780000000092115 035 $a(NjHacI)993780000000092115 035 $a(EXLCZ)993780000000092115 100 $a20231208d1988 uy 0 101 0 $aeng 135 $aur||||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aANSI/IEEE Std 1051-1988 $eIEEE Recommended Practice for Parameters to Characterize Digital Loop Performance /$fInstitute of Electrical and Electronics Engineers 210 1$aNew York, NY, USA :$cIEEE,$d1988. 215 $a1 online resource (12 pages) $cillustrations 330 $aThe purpose of this recommended practice is to suggest a set of transmission performance parameters to be used in the development of standards for low bit-rate digital channels between the user's location and an appropriate test point at the serving office. This recommended practice suggests a set of performance parameters for digital loop transmission between the user location and the serving office. In the case of ISDN the user location is defined as the T-reference point, or the U-reference point. In the case of non-ISDN, the user location is defined as the point in the transmission circuit analogous to the ISDN-defined T or U reference point. This recommended practice is limited to user information bit rates of 200 kb/s or lower. 517 $aANSI/IEEE Std 1051-1988: IEEE Recommended Practice for Parameters to Characterize Digital Loop Performance 606 $aDigital electronics 606 $aElectric apparatus and appliances$xTesting 615 0$aDigital electronics. 615 0$aElectric apparatus and appliances$xTesting. 676 $a621.37 801 0$bNjHacI 801 1$bNjHacl 906 $aDOCUMENT 912 $a996279862403316 996 $aANSI$92072434 997 $aUNISA