Siemens 5890 manual Constant Bit Rate, Non Real-Time Variable Bit Rate, Unspecified Bit Rate

SIEMENS 5890 DSL Router	Chapter 5 Advanced Setup
User’s Guide	ATM Traffic Shaping

4.Select one of the following Service Types.

•Constant Bit Rate:

Requests a static amount of bandwidth that is continuously available for the lifetime of the connection.This bandwidth amount is characterized by a Peak Cell Rate value.

•Real-Time Variable Bit Rate:

Used for applications that require tightly constrained delay and delay variation, but not necessarily a fixed cell rate. VBR-nrt connections are characterized in terms of a Peak Cell Rate, Sustained Cell Rate, and a Maximum Burst Size.

•Non Real-Time Variable Bit Rate:

Used for bursty applications that require service guarantees from the network. VBR-rt connections are characterized in terms of a Peak Cell Rate, Sustained Cell Rate, and a Maximum Burst Size. Frame Relay traffic can also use VBR-nrt.

•Unspecified Bit Rate:

Used for non-real-time, bursty applications that are tolerant of delay and loss. UBR service does not specify service guarantees and is sometimes referred to as "best effort" service.

5.In Peak Cell Rate, enter the peak cell rate if you selected an option that requires a peak cell rate value.

6.In Sustained Cell Rate, enter the sustained cell rate if you selected an option that requires a sustained cell rate value.

7.In Maximum Burst Size, enter the maximum burst size if you selected an option that requires a maximum burst size value.

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