A method of operating a push-to-talk service over a mobile wireless
communication network, where a user of a mobile wireless terminal may
select an automatic or manual answer mode for incoming session
invitations for at least some other users. The method comprises including
in the push-to-talk session invitation sent from a calling party to a
called party, a manual answer mode request, upon receipt of the session
invitation at a push-to-talk server serving the called party, forwarding
the invitation including the manual answer mode request to the called
party regardless of any auto-answer mode setting for the called party,
and receiving the invitation at the called party, and generating a
ringing alert at the called party's terminal.