Arrangement for linking at least one channel in an N-KNAL TIME-MULTIPLEX EXPERIENCE SYSTEM to a counter-protecting channel in a P-CANNEL EXPERIENCE EXPERIENCE EXPERIENCE SYSTEM

摘要

Apparatus for interconnecting a time-division multiplex carrier system, such as T1, with a frequency-division multiplex carrier system, such as LMX-3. The interconnexion is effected in an all digital manner by the use of digital filters, thus avoiding the necessity of down- converting either system to voiceband.