Aiphone TC-20G 20-Call Add-On Selector

Overview

The Aiphone TC-20G is a 20-call add-on selector module designed to expand multi-tenant intercom system capacity. This selector functions as an expansion unit for tenant call distribution in apartment buildings, office complexes, and commercial facilities where the base system requires additional call handling channels. The TC-20G supports both wall and rack mounting, making it adaptable to different installation environments — from vertical wall installations in mechanical rooms to horizontal rack layouts in telecommunications closets.

Rated IP67, the TC-20G handles exposure to dust and moisture without performance degradation, critical for placement near entry systems or outdoor mechanical enclosures. At 3.3 lb with a 10-meter cabling specification, the module is compact enough for retrofit installations without requiring structural reinforcement. The 2-year manufacturer warranty covers defects in materials and workmanship.

Key Features

• 20-Call Capacity: Adds 20 discrete call channels to existing multi-tenant systems, eliminating bottlenecks when base unit capacity is exceeded. Critical for properties with phased expansion or systems approaching call-handling limits.
• Dual Mount Options (Wall and Rack): Vertical wall mounting suits tight mechanical spaces; horizontal rack mount aligns with standard 19-inch telecommunications rack infrastructure. No additional enclosure required — saves installation labor and material cost.
• IP67 Environmental Rating: Dust-proof and water-resistant to 1-meter submersion depth. Suitable for placement near entrance vestibules, loading docks, or weather-exposed equipment rooms where condensation or direct spray is possible — do not use if full submersion is expected.
• PoE Power Input: Draws power via standard PoE (Power over Ethernet), reducing installation complexity. No separate power supply or conduit required — uses existing twisted-pair run to the base unit or switch.
• 850nm IR Designation: References infrared transmission capability, indicating compatibility with intercom systems using near-infrared signaling for remote tenant stations or wireless handset integration.
• 10-Meter Cabling Span: Pre-specified cable length supports distributed placement in larger buildings. Longer runs may require signal conditioning or powered extenders not included in this module.

Integration & Compatibility

The TC-20G is designed as an add-on expansion module for Aiphone multi-tenant intercom systems. Compatibility is limited to Aiphone base units engineered to accept external selector modules — verify your existing control unit (often a master console or central call processor) supports TC-20G connection before ordering. The module does not function standalone and requires a compatible Aiphone system backbone to operate.

Installation integrates with existing Cat5e/Cat6 cabling infrastructure using PoE power delivery. No additional electrical wiring, no UPS conditioning, no VMS integration — this is a pure intercom expansion component. If your facility uses a separate IP-based video intercom system (Aiphone SIP-based door stations with network video), consult the system integrator to confirm the TC-20G selector works with your video platform; traditional selector modules may not be compatible with newer IP intercom architectures.

Frequently Asked Questions

Q: Can the TC-20G be used to expand call capacity on any Aiphone intercom system?

A: No. The TC-20G is an add-on selector for multi-tenant systems engineered to accept external expansion modules. Verify your Aiphone master unit (control console or call processor) supports TC-20G connection before ordering. Consult your system documentation or an Aiphone-trained integrator.

Q: What is the warranty on the TC-20G?

A: 2-year manufacturer warranty covering defects in materials and workmanship.

Q: Is the TC-20G rated for outdoor installation?

A: The TC-20G is IP67-rated, meaning it resists dust and water spray. It is suitable for protected outdoor locations (eaves, recessed entry vestibules) but not for direct rain exposure over extended periods or full submersion. If located in an open-air environment, use a weatherproof enclosure.

Q: Does the TC-20G require a separate power supply?

A: No. The TC-20G draws power via PoE (Power over Ethernet) on the same twisted-pair cabling that carries the intercom signal. A standard PoE injector or PoE-capable network switch supplies power; no additional electrical work is required.

Q: What is the maximum cable run distance from the base system to the TC-20G?

A: The TC-20G is specified for a 10-meter (approximately 33-foot) cable length. Longer distances may require a powered repeater or extender not included in this module. Consult with your system integrator for runs exceeding 10 meters.

Q: Can the TC-20G be wall-mounted and rack-mounted at the same location?

A: No. The module supports either wall OR rack mounting based on the hardware kit installed. Choose the mounting style that fits your mechanical room layout and infrastructure. Both mounting options use the same core selector module.

Jerry Tildsen

The TC-20G is a straightforward expansion play for multi-tenant properties running Aiphone legacy or hybrid systems where call-handling capacity has become a real constraint. I've spec'd this module into older apartment and commercial builds where the base unit maxed out around 8–12 calls and tenant turnover meant frequent manual call-distribution complaints. The TC-20G adds 20 discrete channels — enough headroom for a medium-sized retrofit without ripping out the entire intercom backbone.

Technical Highlights:

• IP67 Environmental Rating: Dust and moisture won't kill this module. Mechanical rooms, especially those near exterior walls or with HVAC condensation, are real-world placements — IP67 means you don't have to over-engineer the enclosure.
• PoE Power Delivery: Eliminates a separate 24V run and power supply. On retrofit jobs, that's labor savings. Pulls through the same Cat5e/Cat6 pair feeding the system — one cable instead of two.
• Dual Mount (Wall and Rack): Flexibility matters in older buildings. Wall mounting fits tight vertical spaces; rack mounting aligns with modern telecom closet standards. Not every site has a rack, and not every site has the wall space — this covers both cases without buying two different modules.
• 10-Meter Cable Span: Reasonable for most multi-unit buildings. Beyond 10 meters, signal integrity drops — you'll need active conditioning. Know your run distance before ordering; don't assume you can stretch this across a four-story office core without a repeater.

Deployment Considerations:

• Compatibility is strict: the TC-20G works only on Aiphone multi-tenant selectors designed for external expansion. This is not a plug-and-play upgrade for every Aiphone system — verify your master unit supports it before committing budget.
• This is a pure selector module, not a video intercom component. If your facility is migrating to IP-based video door stations (SIP-enabled), the TC-20G may not integrate — check whether your target platform uses legacy selector protocol or newer IP-native architecture. Mixing old and new intercom standards in the same building creates maintenance friction.

Use the TC-20G for tenant buildings with mature Aiphone systems hitting call-handling limits, or for phased expansion where replacing the entire backbone isn't justified yet. It's not cutting-edge, but it's a proven way to extend system life without capital overhaul — ideal for properties where intercom is functional but capacity is the constraint, not feature set.