My menu is as follows:

Datebook
Media Center
Java Apps
My Info
PT Manager
Memo
Profiles
Bluetooth
VoiceRecord
Call Forward
Shortcuts
Call Timers
Customer Care
Settings
Contacts
Recent Calls
Internet
Call Alert
Messages
GPS
Ring Tones
Quick PTT


The only promising part is the 2 Way Radio in Settings, but it doesn't have anything of the kind you describe.

I suspect the local version is Directalkless.