agent's Journal: Telephone post fix dial code.

Currently, in America (USA USA USA we are number 1!), telephone numbers are 10 digits. If they would allow you to append a phone code you could allow deny calls based on that.

There could be universal codes. For example, my silent call idea could be implemented with this.

888-555-1234 444 (Calls the person, but disables the ringer.)
888-555-1234 111 (Calls the person, and goes stright to v-mail.)
888-555-1234 666 (Calls the person, and turns on the vibrator ;-)

  No code could foce them stright to voice mail.