资 源 简 介
The ’90 years represent a transition period fromfully analog solution to fully digital (ISDN) one inPABX systems design. In particular in this newsystems generation analog and digital line cardswill coexist. The SLICs for this new systemsshould satisfy the following requirements:- do not degrade the transmission performancesof the digital part (ex: noise due to relay bouncesduring ringing injection)
