User's Manual

Table Of Contents
2-60
BreezeACCESS 4.0 Operations and Administration
Manual Revision: 1.01
period of inactivity. If no data was received from the Ethernet port
during the last N seconds, the unit is allowed to transmit N times its
CIR value without any delay. For example, after an inactivity time of
0.5 second, a unit with CIR = 64 Kbps can transmit up to 64 Kbits x
0.5 = 32 Kbits without any delay.
" MIR/CIR Option – Enables or disables the CIR/MIR
support feature. In cells where the AU and all SUs use SW
version 4.0 and higher, the MIR/CIR Option in the AU
controls the operation of the whole cell. The MIR/CIR Option
in the SU is thus meaningless, as the setting of the option in
the AU will override possible conflicting setting in any of the
served SUs. The option is available in the SUs only for
compatibility with previous versions to support operation in
cells where the AU uses SW version 3.X and lower.
Default selection is Disable.
" MIR: AU to SU (SU only) Sets the Maximum Information
Rate of the down-link from the AU to the SU. The MIR value
cannot be lower than the corresponding CIR value.
Valid values are from 32 to 2200 Kbps.
The default value is 128 Kbps.
" MIR: SU to AU (SU only) Sets the Maximum Information
Rate of the up-link from the SU to the AU. The MIR value
cannot be lower than the corresponding CIR value.
Valid values are from 32 to 2200Kbps.
The default value is 128Kbps.
" CIR: AU to SU (SU only) Sets the Committed Information
Rate of the down-link from the AU to the SU. The CIR value
cannot be higher than the corresponding MIR value.
Valid values are from 0 to 2200Kbps.
The default value is 64Kbps.
" CIR: SU to AU (SU only) Sets the Committed Information
Rate of the up-link from the SU to the AU. The CIR value
cannot be higher than the corresponding MIR value.
Valid values are from 0 to 2200Kbps.
The default value is 64Kbps.
" Maximum Burst Duration (SU and AU) Sets the maximum
time for accumulating burst transmission rights according
to the Burst Duration algorithm.
NOTE:
The value of the MIR/CIR option parameter must be the same for all Subscriber
Units served by the same AU (i.e. Enable for all SUs or Disable for al SUs).
Otherwise, throughput to/from all SUs in the cell may be reduced significantly