GT-BC.M

The Aiphone GT-BC.M is the central audio bus controller for standard GT Series multi-tenant intercom systems (audio-only configuration), distributing power and data signals to tenant stations, entrance panels, and guard stations.
One unit required per standard system (up to 48 tenants, max 25 per trunk), it manages single-channel talk/video paths and supports hands-free or handset communication modes with three distinct call tones (entrance, guard, doorbell).
Key Specifications
Feature
Specification
Power Source
24V DC via PS-2420UL (max 0.9A consumption) 
Capacity
Max 48 tenant stations (25 per trunk, 5 entrances max) ​
Wiring
2-conductor PE (#872002), 980' to furthest tenant 
Mounting
Surface wall or DIN rail (W-DIN11 bracket) 
Door Release
N/O & N/C dry contacts (<4A, 24V AC/DC) ​
Dimensions
108.5 × 122.5 × 61 mm (4-1/4" × 4-13/16" × 2-3/8") ​
Weight
450g (0.99 lbs), middle gray ABS ​
Operating Temp
0°C to +40°C (32°F to 104°F) ​