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Juniper was the first North American IP routing vendor to achieve the prestigious TL 9000 certification by the Quality of Excellence for Suppliers of Telecommunications (QuEST) Forum in the router category, for design, development, provision and service and support.



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T640 T-Series Control Boards (T-CBs) Description

This chassis supports up to two T-CBs. The Routing Engine requires an adjacent T-CB to provide control and monitoring functions for the router (see Figure 1). These functions include determining Routing Engine mastership, controlling power and reset for the other router components, monitoring and controlling fan speed, and monitoring system status.

You can install up to two T-CBs in the router. Control boards install into the upper rear of the chassis in the slots labeled CB0 and CB1 (referred to as CB-0 and CB-1, top to bottom). If two T-CBs are installed, one functions as the master and the other as its backup. If the master fails or is removed, the backup restarts and becomes the master.

Each T-CB requires a Routing Engine to be installed in the adjacent slot. CB0 installs above RE0, and CB1 installs below RE1. T-CBs cannot function if a Routing Engine is not present in the adjacent slot.

If the host system is redundant, the backup T-CB is hot-removable and hot-insertable, but the master T-CB is hot-pluggable. A T-CB that is not redundant is hot-pluggable.

Figure 1: T-CB

Image g002130.gif

Note: The T-CB requires JUNOS Software Release 7.0 or later.

Published: 2009-09-26