/v is mandatory for msiexec. Use /qn additionally for installation without user interface.
Specifies the name of Com4Tel server (in the example this is server920). Is only required for 3rd party.
Specifies which scenario you want to install (in the example this is 1st Party). This entry is optional.
3 = 3rd Party (default)
1 = 1st Party
4 = 3rd Party and 1st Party
Specifies the groupware used (in the example this is Outlook). This entry is optional.
OL = Microsoft Outlook (default)
LOTUS = Lotus Notes
GW = GroupWise
"" = no groupware used
Specifies the installation path. As a default this is C:\Program Files\Avaya\Com4TelC. This input is optional.