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<h2>Impact on capacity</h2>

<p>Even though the maximum number of uplink TBFs per timeslot is 7 and
the maximum number of downlink TBFs per timeslot is 9, Admission Control may
restrict the maximum amount of TBFs in case timeslot capacity is reserved
and no more TBFs can be accepted. For more information on parameters with
which you can adjust the number of TBFs, see <em>(E)GPRS in BSC</em> in
BSC/TSCM Product Documentation.</p>


<p>Streaming calls have the same priority as circuit-switched (CS) calls.
If there are no CS channels for a CS call, permission for downgrade is requested
from the PCU, and if the service would degrade with streaming PFCs, the permission
is not granted. This may restrict CS calls. </p>


<p>Within radio resources, EDAP and DSP resources are also guaranteed for
streaming PFCs. This means that EDAP and DSP resources have to be dimensioned
so that they correspond to the desired guaranteed service. For more information
on traffic channel dimensioning for streaming services, see <em>Enhanced
Quality of Service Dimensioning Principles</em> in BSC/TSCM documentation.</p>


<p>One MS can have a maximum of 12 PFCs (six in each direction) and the
total number of PFCs in one PCU is 13824 in downlink direction and 10752 in
uplink direction.</p>
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