TD-1H/B

The Aiphone TD-1H/B is a compact single-call handset master station for the TD-H Series selective-call intercom system, designed for point-to-point communication with one TD-1H/B sub-master or handset substation.
It supports full-duplex handset conversations, station-select break-in calls, and optional paging zones with external signaling (RY-AC/A relay required), powered by 12V DC for reliable facility intercom use.
Key Specifications
Feature
Specification
Capacity
1-call (single station) ​
Power
12V DC, 70mA (PS-1225UL required) 
Communication
Handset full-duplex ​
Mounting
Wall/surface or desk (reversible cradle) ​
Door Release
N/O dry contact, 30V AC/DC, 1A ​
Wiring
2-3 wires + loop conductors (non-shielded) ​
Dimensions
91 × 125 × 257 mm (3.6 × 4.9 × 10.1") ​
Weight
0.57 kg (1.25 lbs) ​