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Cisco MGX 8950 Hardware Installation Guide
Release 3, Part Number 78-14147-02 Rev. A0, November 2002
Chapter 1 Product Overview
System Hardware Components
SMB-4-155
The SMB-4-155 is a back card that provides four OC-3c/STM-1 interfaces, each operating at 155 Mbps.
Figure 1-19 shows a close-up of the SMB-4-155 faceplate.
Figure 1-19 SMB-4-155 Faceplate
1 Enabled LED
• Green—The back card is active.
• Off—The back card is not active.
3 RX and TX SMB connectors for Port 1
through Port 4
2 Signal LED
• Green—The back card is receiving a
signal on the corresponding line.
80639
ENABLED
SIGNAL
RX
PORT 1
TX
SIGNAL
RX
TX
PORT 2
SIGNAL
RX
PORT 3
TX
RX
SIGNAL
TX
PORT 4
SMB
4-155
1
2
2
2
2
3
3
3
3