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IM AQ1300-01EN
Burst Size Test (BS TEST)
In a burst size test, burst frame signals (consecutive frame signals) are periodically sent to a network
device to measure the following parameters.
The AQ1300/AQ1301 automatically calculates the burst transmission period from the specified burst
size (CBS, EBS) and frame length.
• Frame loss (FL)
• Frame transfer delay (FTD)
• Frame delay variation (FDV)
In a single measurement, up to eight service circuits can be measured in order.
CBS Test (Committed Burst Size)
Burst frame signals corresponding to the specified CBS value are sent. When transmission is
complete, frame signal transmission is stopped for a given time. Then, traffic is resumed at the
specified committed information rate (CIR). When the transmission at the CIR rate for a given time
is complete, frame signal transmission is stopped for a given time.
This operation is repeated to measure the parameters (FL, FTD, FDV) of burst frame traffic for the
specified time (T seconds).
Tx rate
Example of CBS test (per service)
Test time
Line Rate
Space frames
(constant rate
transmission)
CBS
value
CIR
1000 Mbps
First burst frame
Second burst frame
T = 1 to 60 s
CBS
value
1.20 Y.1564 Test
