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Chapter 1
About the Passport 8683POS Module
The Passport 8683POS Module provides network transmission using packet over Synchronous Optical Network (SONET) services. The Passport 8683POS Module for the Passport 8600 series routing switches provides WAN support to the Passport product line by allowing access to SONET services in the metropolitan area. Where multiple campuses exist in a single metropolitan area, you can connect these campuses without compromising performance or increasing complexity.
The Passport 8683POS Module is a baseboard with slots for three of the following two optional media dependent adapters (MDAs):
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The Passport 8683POS Module supports up to six input/output (I/O)
You can put more than one Passport 8683POS Module in the Passport 8600 series chassis, except slots 5 and 6, which are reserved for the Passport 8690 Switch Fabric (SF) modules. The maximum number of modules on a chassis is four.
One Passport 8690 SF module acts as the CPU for the chassis, and the other module is the standby CPU, taking over in case of failure. If a CPU failover occurs, all traffic on the chassis stops momentarily while the standby CPU reinitializes all input/output modules.