Switch Fabric Modules - Brocade Communications Systems MLX Series Installation Manual

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Router modules
OC-12c and OC-48c POS interface module ports
OC-12c and OC-48c POS interface modules have two, four, or eight ports that accept SFP optical
transceivers (provided by Brocade). For a list of SFP optics supported by Brocade, refer to the latest
version of the Brocade Optics Family Data Sheet, available online in the following location:
http://www.brocade.com/downloads/documents/data_sheets/product_data_sheets/Optics_DS.p
df
OC-192c POS interface module ports
OC-192c POS interface modules have one or two ports that accept XFP optical transceivers
(provided by Brocade). For a list of XFP optics supported by Brocade, refer to the latest version of
the Brocade Optics Family Data Sheet, available online in the following location:
http://www.brocade.com/downloads/documents/data_sheets/product_data_sheets/Optics_DS.p
df
Clocking and timing a POS interface module
POS interface modules support the following timing configurations:
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•
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DANGER
The ports labeled BITS1 and BITS2 are safety extra low voltage (SELV) circuits. SELV circuits
should only be connected to other SELV circuits. All interconnected equipment should be located
in the same building as the unit.
Configuration of the internal and external clocking and timing options is described in the "Using
Packet Over SONET Modules" chapter in the Brocade MLX Series and Brocade NetIron Family
Configuration Guide.
Clocking port pin assignments
The clocking ports are standard RJ48C connectors. Refer to
for pin-out descriptions and diagrams.

Switch fabric modules

Table 23
NetIron XMR routers.
48
Internal Timing – This option uses the internal stratum 3 clock. This is the default clocking
configuration.
Loop Timing – This option receives timing from the line.
Line Timing – This interface receives timing from the line and is used to clock all ports on the
same interface module but not for the entire router.
External (BITS) Timing – This option allows timing to be provided by a central office BITS
system. Each POS interface module has four RJ48C ports for connections to the external BITS
system. The two input ports (labeled IN) are for receiving clocking. The two output ports
(labeled OUT) provide clocking to another POS interface module.
lists the switch fabric modules that are available for Brocade MLX Series and Brocade
Brocade MLX Series and Brocade NetIron XMR Hardware Installation Guide
Chapter 9, "Hardware Specifications"
53-1002373-02