Breakout Box Model 61 Vintage EIA Tri-State

IDS International Data Sciences Model 61 EIA Tri-State Breakout Panel

IDS International Data Sciences Model 61 Tri-State EIA Breakout Panel

VTG IDS Model 61 EIA Tri-State Breakout Panel breakout box / interface analyzer

Wavetek Model 725 Breakout Box

International Data Sciences Model 60 EIA Interface Monitor and Breakout Panel