00505nam a22001097a 4500020002100000082001700021100004400038245004300082260003800125300003500163650019700198  a0070472815 (pbk)  a621.382bBAT  aBates (Bud),Regis J.aDonald W. Gregory  aVoice and data communications handbook  aNew DelhibTata McGraw Hillc2001  axviii, 1073 p.b: ill.c24 cm.  aTelecommunicationsaVoice and data communicationsvHand bookvTelephone networkvAnalog communicationsvCarriersvTraffic engineering calculationsvLines and trunksvIntranetvOSI modelvFEAS