RES 87202 - Laserfiche WebLink

characters per second reliably in a half duplex mode using a standard telephone handset. The transmission rate shall be push button selectable at the front panel of the terminal. (2) Construction--Each portable terminal case shall be an attache case type, made"of impact resistant material with a metal frame. The keyboard shall be hinged to the front so that it will close over the face of the CRT and control panel and lock in position. Additionally, the portable terminal shall include a handle for easy transportation and handling. The AC power cord shall be easily folded into the unit. A hinged door shall be supplied to protect the acoustic coupler. ~'V'~ (3) Weight--each portable terminal shall weigh no more than 40 pounds. ,~- (4) Power Requirement--Each portable terminal shall operate on a 115 ;_____-f Volt, '60 Hz power source. SOFTWARE. All software required for system operation shall be provided by the manufacturer of the equipment. The software shall be designed to provide an interactive language oriented for traffic engineering. It shall be possible for the user (traffic engineer) to change all operating control parameters while the system is on-line. A hard copy record of all parameter changes along with the time and date of such change shall be generated. The software shall be written in such a manner that it cannot be inadvertently damaged by someone striking keys at random on the terminals. The system shall provide at least 2 modes of control, a free mode and a coordinated mode. In the free mode, each intersection or intersections so designated shall operate without supervision from the master. This mode shall occur when the master determines it should occur. It shall also occur when the communications to an intersection fails or the master i tsel f fai 1 s · In the coordinated mode an intersection is assigned to one of 16 subsystems. It shall be possible to affect coordination through each subsystem independently. The software shall be provided with 2 discrete entry codes. One entry code shall be assigned to each subsystem and to any parameters associated with a specific intersection controller. It shall be possible to list, s~t or change all coordination parameters for each intersection independently, but only through use of the discrete entry code associated with the intersection. The following operations shall be programmable for each intersection through either the'hard copy terminal or the portable terminal and keyboard: (1) Synchronized Phase Selection. It shall be possible to assign any 2 concurrent phases as the synchronized (sync) phases. The sync phase shall yield to other phases only during the permissive periods determined by its assigned offset at times when a conflicting call is present. -7-