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Provides a single primary rate trunk
interfaces or a T1 circuits. The PRI is available as T1, E1 or E1R2MFC
depending on the market. T1 trunk cards incorporate an integrated CSU/DSU,
eliminating the need for an external unit. The CSU function allows the trunk
to be put in loop-back mode for testing purposes. This can be set manually,
using the monitor application, or automatically from a Central Office
sending a Line Loop Back (LLB) pattern. The DSU function allows the T1 trunk
to be shared between data and voice services. |
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