User Guide

1-25
Cisco Metro 1500 Series Hardware Installation Guide
78-10588-03
Chapter 1 Product Overview
System Modules
The BSM is installed in chassis A to avoid service interruption on upgrading the
unit to more than 16-channel WCM or 8-channel TDM4E, respectively. This also
means that if you only have the primary chassis, you need a chassis A to install a
BSM.
Optical Connectors of the BSM
The BSM has up to 10 optical connectors:
• One input connector (M1 to M4) for each of the four MUX modules
• One output connector (D1 to D4) for each of the four DMX modules
• One common input (D) or common output (M)
All connectors are of the MiniSC type. Figure 1-12 shows the front panel of the
BSM. Connecting the BSM is described in the “Connecting BSMs with MUX and
DMX Modules” section on page 5-4 and in the “Connecting a BSM to an RSM”
section on page 5-6.