Dsp Requirements - Avaya 1000 Installation And Commissioning Manual

Branch Office engineering example
6. Calculate the Branch Office IP Phone to PRI. PRI_IP_CCS = VTRK_CCS – TDM_IP_CCS
396 – 144 = 252 CCS
7. Calculate the TDM telephone to PRI traffic: PRI_TDM_CCS = Total_TDM_CCS –
TDM_IP_CCS

DSP requirements

You must calculate the DSP port requirement in increments of 32.
The CP MG, , MC32, and MC32S provide DSPs in groups of 32. When DSP calculations refer to a
Voice Gateway Media Card, it is a bank of 32 DSPs which are either an MC32, MC32s, CP MG 32,
CP MG 128, or DSPs from a DSP daughterboard. Therefore, an card that is fully populated with 256
DSPs is equivalent to 8 Voice Gateway Media Cards.
Table 55: Erlang B and Poisson values in 32-port increments
Poisson values for P.01 Grade-of-Service (GoS) in 32-port increments. The DSP resource required
to handle the offered traffic is the number of ports corresponding to the first Erlang B CCS capacity
greater than the calculated traffic value.
Table 55: Erlang B and Poisson values in 32-port increments
Erlang B with P.01 GoS
Number of DSP ports
32
64
96
128
160
192
Calculating Branch Office DSP requirements
1. Calculate the DSP traffic (see step 4 of the Calculating traffic procedure). Total_DSP_CCS =
VTRK_CCS
Note:
This is also equal to TDM_IP_CCS + PRI_IP_CCS = 396 CCS
2. Calculate the number of DSPs required to support this level of traffic by using
Erlang B and Poisson values in 32-port increments
determine the number of DSPs required at the Branch Office.
Branch Office Installation and Commissioning
218
Poisson with P.
01 GoS
CCS Number of Virtual Trunk access ports
794 32
1822 64
2891 96
3982 128
5083 160
6192 192
Comments? infodev@avaya.com
on page 218 provides Erlang B and
on page 218, Erlang B P.01 columns to
CCS
132
1687
2689
3713
4754
5804
Table 55:
June 2014