Overview
About this product
The 4100-1272 expands compatible Simplex firefighter telephone systems with additional telephone circuits. It is used in main control or transponder equipment and supports an optional Class A adapter.

Fire Alarm Systems
SimplexModel 4100-1272
Expansion telephone control module providing three Class B telephone circuits.

Overview
The 4100-1272 expands compatible Simplex firefighter telephone systems with additional telephone circuits. It is used in main control or transponder equipment and supports an optional Class A adapter.
Three Class B telephone NACs; optional 4100-1273 adapter converts the telephone circuit arrangement to Class A.
| Technical details | Three Class B telephone NACs; single-block mounting. S4100-0034 lists 80 mA supervisory and 140 mA in use, plus remote telephone loads. |
|---|