Johnny knew, though, that certain phone calls were not monitored: calls between a prisoner and his attorney, protected by the Constitution as client-attorney communications, for example. In fact, the facility where Gondorff was being held had telephones connected directly to the federal Public Defender's Office. Pick up one of those phones, and a direct connection is made to the corresponding telephone in the PDO. The phone company calls this service Direct Connect . The unsuspecting authorities assume the service is secure and invulnerable to tampering because outgoing calls can only go to the PDO, and incoming calls are blocked. Even if someone were somehow able to find out the phone number, the phones are programmed in the telephone company switch as deny terminate , which is a clumsy phone company term for service where incoming calls are not permitted.