It was decnet between the rt11 systems and the rsx system. The rsx system
(11/44) was hasped to the ibm using a leased line. (General Dynamics Convair
in San Diego. The pdps were at Lindberg Field and the IBM lived about 12
miles away on Kearny Meas.) The RJE-HASP software was supplied by Dec, but
was (as I remember) unsupported software.
Jim