Atec Agilent-J2300E - Manual (Page 24)

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Frame Relay
Committed Information Rate (CIR) Measurement
CIR is one of the most important features for Frame Relay Management. CIR is
a contract between the Service Provider and a User. This contract allows both
parties to exchange information under controlled traffic conditions. CIR is the
rate expressed in bits per second (bit/s) where the network agrees to transfer
information under normal conditions. This rate is measured over the
measurement interval Tc. The default value of Tc is 1 second. Figure 8 depicts
a typical CIR measurement.
No matter how complex the testing needs are, the Agilent Advisor with
interfaces such as the T1, E1, E3/T3, or the HSSI lets the user test and
troubleshoot complex WAN environments to solve WAN access and
internetworking problems quickly.
The Agilent Advisor provides extensive real-time and post-processing test
capabilities for the Frame Relay protocol according to the following
recommendations:
• ITU-T Q.933 Annex A
• ANSI T1.617 Annex D
• Original Frame Relay consortium
The Advisor with its extensive Frame Relay testing capabilities allows the user
to test:
• Physical Interface
• Physical Layer
• Link Layer
• LMI Signaling
• LMI/PING Responses
• DLCI Assignments
• CIR
• Data Transfer
• Protocol Distribution
• SLA
These basic verification techniques are general approaches to WAN analysis
and troubleshooting that are accepted in the industry because of their
systematic appeal and proven effectiveness.
Figure 8: CIR Measurement.