00936nam 2200313 450 99657497980331620231212123623.01-5044-9096-7(CKB)4100000012897290(NjHacI)994100000012897290(EXLCZ)99410000001289729020231212d2022 uy 0engur|||||||||||txtrdacontentcrdamediacrrdacarrier820-2021 IEEE Standard Telephone Loop Performance Characteristics - Redline /Institute of Electrical and Electronics EngineersNew York, NY :IEEE,2022.1 online resourceTelephone communication channelsTelephone communication channels.384.64NjHacINjHaclDOCUMENT996574979803316820-20213881735UNISA