Figure 4-36 12In1 S4 Back Card Faceplate - Cisco MGX 8850 Installation And Configuration Manual

Frame Service Modules
Figure 4-36 12IN1 S4 Back Card Faceplate
Eight-Port FRSM With T1 or E1
The eight-port FRSMs support channelized or unchannelized service on either T1 or E1 lines.
Figure 4-37 (applies to both MGX-FRSM-8T1 and MGX-FRSM-8E1), and Figure 4-38 and
Figure 4-39 (primary and redundant back cards for T1 and E1).
Enclosure and Card Installation 4-39