DSP resource calculation

In the following calculation, fG711 = fraction of the load that is G.711, and fSHF = fraction of the IP load that shuffles.

The DSP resource calculation is complicated by the fact that IP endpoints can be assigned DSP resources in their region (or in another connected region), while TS (Time Slot) endpoints can use DSP resources only in their G700 Media Gateway. The calculation below deals with this complexity by computing a "IP centric" result (which would be correct for an all IP endpoint region), and a "TS centric" result (which be correct for an all time slot endpoint region). The TS result yields the largest number of DSP resources. Note that 43.0 Erlangs is the P001 load for 64 servers. Either result, or an intermediate value, can be used in the next step.

For each network region, perform the following procedure.

Step 4. DSP resource calculation

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1. Using the trunk group carried loads, calculate the trunk G.711 load for each trunk group for each type of trunk.

For TS trunk groups, G.711 load = TS trunk group load x (2 - fG711)

For IP trunk groups, G.711 load = Number of calls x (10 / 3600) x fSHF

Sum over all trunk groups.

2. Using the station carried loads, calculate the station G.711 for each type of station.

For TS stations, G.711 load = TS station load x (2 - fG711)

For IP Stations, G.711 load = Number of Calls x (10 / 3600) x fSHF

Sum over all stations.

3. For an IP centric region, sum the trunk and station results to get the G.711 carried load. Using an appropriate GOS method (EBC or simultaneous use), calculate the number of G.711 DSPs required.

Number of DSP Resources = Number of G.711 DSPs / 64 (rounded up)

4. For a TS centric region, sum the trunk and station results to get the G.711 carried load.

Number of DSP Resources = G.711 carried load / 43.0 (rounded up)

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