Image and descriptive information courtesy of Tom Ellis
Image and descriptive information courtesy of Tom Ellis
This photo shows the Polygrid Trunking connectivity to the Jasper, Alabama 4-wire #1 ESS (Electronic Switching System). It looks like there are eighteen AUTOVON switchers having a direct trunk group to Jasper. This would include those in the inner-grid and outer-grid trunking. In the event of traffic overload or a switch impairment, a plastic overlay was placed on the IMAD to show the routing and trunking associated for that particular switching machine.
Updated on July 25, 2004 at 21:18 by Albert LaFrance