[Arcy]

"sm_deadtalk 1" and "sv_alltalk 0" If You want deadtalk - dead t and dead ct can talk to each other, but living t can speak only to t and same for ct.

"sv_alltalk 1" "sm_deadtalk 0 or 1, don't make a difference" If You want every player on the server to be able to hear each other, dead, alive and spec.