Each port has T, R, SZ, SZ1, S, and S1 signal leads Used for on-premises applications such as music-on-hold, loudspeaker paging, code calling, and recorded telephone dictation access
Each port has T, R, SZ, SZ1, S, and S1 signal leads Used for on-premises applications such as music-on-hold, loudspeaker paging, code calling, and recorded telephone dictation access