EIS Executone Isoetec 23120 IDS 42 2x4 Expansion Card IRS L

EIS Executone Isoetec 23120 IDS 42 2x4 Expansion Card IRS M

Executone 21680-1 IDS EVCM CPLD IRS 21640-2 Isoetec Digital System See Pics

EIS Executone Isoetec 22930 IDS 228 4x8 Port Card IRS D/F

Executone Isoetec 15610 IDS D.I.D. Trunk Card

EIS Executone Isoetec 22550 IDS 84 4x8 Port LSI Card IRS K

EIS Executone Isoetec 15510 T1 Interface Card IRS J

Executone Isoetec 15460 VCM LSI Card IRS D