Virtual Trunk Requirements; Call Server Real-Time Usage - Avaya 1000 Installation And Commissioning Manual

Note:
The Total DSP is 396 CCS, therefore this can be easily sustained by 32 DSP ports (396
is less than 794).
BO_DSPs = 32

Virtual Trunk requirements

Calculating Virtual Trunk requirements
1. Calculate the Virtual Trunk traffic. VTRK_CCS = VTRK_CCS (see step 4 of the Calculating
traffic procedure) = 396 CCS
2. Calculate the number of Virtual Trunks required to support this level of traffic by using
55: Erlang B and Poisson values in 32-port increments
to determine the number of Virtual Trunks required to the Branch Office.
Note:
The Virtual trunk CCS is 396, therefore this can be easily sustained by 32 Virtual Trunk
ports (396 is less than 732).
Virtual Trunks to Branch Office = 32
Note:
To get a more granular relationship of trunk CCS to ports required, use a general
Poisson P.01 table. For more information about Trunk traffic Poisson 1 percent blocking
table, see Avaya Communication Server 1000E — Planning and Engineering,
NN43041-220.

Call Server Real-time usage

The following is a simplified engineering example of a Communication Server 1000E. For more
information about engineering a Communication Server 1000E , see Avaya Communication Server
1000E — Planning and Engineering, NN43041-220.
When a branch is operating in a normal branch mode, the Main Office handles the local UNIStim IP
traffic, therefore only inbound virtual trunk traffic affects the branch.
When a branch operates in local mode (the link to Main Office is down), the local UNIStim IP traffic
occurs at the branch, but there are no Virtual Trunks involved.
This example assumes the branch runs in standard branch mode.
Calculating Call Server Loading
1. Calculate the TDM Phone to TDM Trunk calls.
June 2014 Branch Office Installation and Commissioning
Comments? infodev@avaya.com
Virtual Trunk requirements
on page 218, Poisson P.01 columns
Table
219