Simplify R1/R2 audio-bus distribution in an Aiphone GT Series multi-tenant intercom system with the Aiphone GTW-DP Distribution Point Wiring Terminal Strip.

The GTW-DP provides a convenient centralized connection point for the R1/R2 audio lines, allowing GT Series entrance stations, tenant station trunks, security guard stations, and related audio-bus equipment to be connected to the common GT audio line.

The GTW-DP is a passive wiring component, so no dedicated power supply is required. An installation mounting rail is included for organized wall or equipment-cabinet mounting.

Key Features

• Genuine Aiphone GTW-DP

• Distribution point terminal strip

• Designed for Aiphone GT Series

• Provides centralized connections for R1/R2 audio lines

• Parallels / commons GT Series audio-bus wiring

• Passive device — no power required

• Included mounting rail

• Suitable for wall or equipment-cabinet mounting

• Supports standard GT Series audio-bus architecture

• Compatible with entrance-station audio lines

• Compatible with tenant-station audio trunks

• Compatible with GT-MKB-N guard station connections

• Uses 2-conductor solid non-shielded PE-insulated wiring

• Up to 980 ft from distribution point with approved 20 or 18 AWG cable

• TAA compliant

• Manufactured in the USA

Product Specifications

Manufacturer: Aiphone
Model: GTW-DP
Series: GT Series
Product Type: Distribution Point Wiring Terminal Strip
Function: R1/R2 Audio Bus Distribution
Power Requirement: None
Connection Type: Terminal Strip
Audio Bus: R1 / R2
Wire Type: 2-Conductor, Solid, Non-Shielded, PE Insulated
Recommended Audio Wire: Aiphone #872002 Series
Mounting: Wall / Equipment Cabinet
Mounting Rail: Included
TAA Compliant: Yes
Country of Origin: USA
Application: GT Series Multi-Tenant Intercom Systems

R1/R2 Audio Bus Distribution

The GTW-DP is used as a centralized distribution point for the GT Series R1 and R2 audio lines.

Instead of making multiple field splices, the installer can bring the applicable audio-bus wiring to the GTW-DP and use the terminal strip to create a clean common distribution point.

This helps organize wiring for:

• Entrance stations

• Tenant-station trunks

• Security guard stations

• GT-BC audio bus controller

• Additional GT Series audio-bus equipment

Passive Terminal Strip

The GTW-DP does not process audio or data electronically.

It functions as a passive terminal connection point that electrically parallels the R1/R2 connections.

Because it is passive:

• No programming is required

• No network configuration is required

• No dedicated power supply is required

• No separate system addressing is required

This makes the GTW-DP a straightforward but important component in larger GT Series installations.

Used with the GT-BC

The GTW-DP is commonly installed downstream of the:

GT-BC – Audio Bus Control Unit

The GT-BC handles:

• Audio communication

• System data

• Audio-bus control

The GTW-DP provides the physical distribution point where the R1/R2 common audio line can branch toward the applicable system equipment.

GT-BC to GTW-DP Wiring Distance

Aiphone specifies the following maximum distance from the GT-BC to the distribution point:

22 AWG

Up to 10 ft

20 AWG

Up to 16 ft

18 AWG

Up to 16 ft

The GTW-DP is therefore normally installed close to the GT-BC in the main equipment or communications area.

GTW-DP to Entrance Station

Maximum wiring distance from the GTW-DP to a compatible GT Series entrance station:

22 AWG

Up to 490 ft

20 AWG

Up to 980 ft

18 AWG

Up to 980 ft

GTW-DP to Security Guard Station

Maximum distance from the GTW-DP to a compatible:

GT-MKB-N – Video Security Guard Station

is:

22 AWG

Up to 490 ft

20 AWG

Up to 980 ft

18 AWG

Up to 980 ft

GTW-DP to Farthest Tenant Station

Maximum distance from the GTW-DP to the farthest tenant station on the applicable audio bus:

22 AWG

Up to 490 ft

20 AWG

Up to 980 ft

18 AWG

Up to 980 ft

Actual allowable distance depends on the complete system architecture and conductor size.

Maximum Cumulative Wiring

Aiphone's current GT Series documentation specifies total cumulative wiring limits per common line and sub-trunk line.

22 AWG

Up to 5,400 ft cumulative

20 AWG

Up to 8,200 ft cumulative

18 AWG

Up to 8,200 ft cumulative

Always verify the entire installation against the current GT Series wiring documentation before installation.

Recommended Audio Wiring

For the R1/R2 audio bus, Aiphone specifies:

2-Conductor, Solid, Non-Shielded, PE-Insulated Cable

Recommended Aiphone cable includes:

• 87200250C – 20 AWG | 2-Conductor | 500'

• 87200210C – 20 AWG | 2-Conductor | 1,000'

• 872002P10C – 20 AWG | 2-Conductor | Plenum | 1,000'

The #872002 family is intended for GT Series audio/data wiring.

Audio vs. Video Wiring

The GTW-DP is specifically used for the R1/R2 audio line.

Aiphone's GT Series wiring generally uses:

Audio

#872002 Series

20 AWG, 2-conductor, solid, non-shielded, PE insulated.

Video / Applicable Power Runs

#871802 Series

18 AWG, 2-conductor, solid, non-shielded, PE insulated.

Audio and video circuits should be installed according to the specific GT Series wiring diagram.

Standard GT Series Installation

A typical standard GT Series installation may include:

• GT-BC – Audio Bus Control Unit

• GTW-DP – Audio Distribution Point

• GT-VBC – Video Bus Control Unit

• GT Series entrance station

• Tenant stations

• GT-MKB-N security guard station

• PS-2420UL power supply

• GT-4Z video distribution adaptors

The exact equipment required depends on whether the installation is audio-only or audio/video.

Audio-Only Systems

In an audio-only GT Series system, the GTW-DP can provide the main branching point between the GT-BC and:

• Audio entrance stations

• GT-1A tenant stations

• GT-1D tenant stations

• GT-MKB-N guard station

• Other compatible GT audio devices

Video Systems

In a video GT Series system, the GTW-DP continues to distribute the audio R1/R2 bus.

Video is handled separately through equipment such as:

• GT-VBC – Video Bus Control Unit

• GT-4Z – 4-Way Video Distribution Adaptor

• GT-4ZP – Video/Power Distribution Adaptor

The GTW-DP does not replace the video bus controller or video distribution adaptors.

Included Mounting Rail

The GTW-DP is supplied with a mounting rail for organized installation.

It is commonly mounted:

• Inside a low-voltage cabinet

• On an equipment backboard

• In a communications room

• Near the GT-BC

• At the central GT Series distribution location

Installing the terminal strip near the GT-BC also helps maintain the short maximum distance specified between the bus controller and distribution point.

Equivalent Distribution Function

Aiphone describes the GT Series distribution point as any suitable connection method that parallels or commons the R1/R2 connection.

Examples can include:

• GTW-DP terminal strip

• Appropriate terminal blocks

• Punch-down equipment

• Other approved common connection methods

The GTW-DP provides the purpose-built Aiphone solution for a clean and organized installation.

TAA Compliant

The GTW-DP is listed by Aiphone as a TAA-compliant component.

Aiphone identifies the GTW-DP as manufactured in:

USA

This can make it suitable for applicable government, institutional, and federally funded projects requiring TAA-compliant equipment.

Ideal Applications

• Apartment buildings

• Condominium complexes

• Multi-tenant residential buildings

• Commercial office buildings

• Mixed-use developments

• Student housing

• Senior-living properties

• GT Series audio systems

• GT Series video systems

• Central equipment rooms

• New GT Series installations

• Existing GT Series wiring upgrades

Important Ordering Information

This listing is for the GTW-DP Distribution Point Wiring Terminal Strip.

The mounting rail is included.

The following are sold separately unless specifically stated:

• GT-BC audio bus control unit

• GT-VBC video bus control unit

• PS-2420UL power supply

• Entrance stations

• Tenant stations

• GT-MKB-N security guard station

• GT-4Z / GT-4ZP distribution adaptors

• #872002 audio cable

• #871802 video / power cable

• Electric locking hardware

• Other GT Series components

The GTW-DP is a passive terminal strip and does not require its own power supply.