Project Telecom PT104-4B 4 Button Push-to-Call Outdoor Phone

The Project Telecom PT104-4B Push-to-Call Outdoor Phone is a heavy-duty communications solution engineered for reliable operation across industrial, outdoor and public-access environments. Combining four push-to-call operation, an open access weatherproof design, IP66-rated protection, vandal-resistant construction and a choice of Analogue, SIP or GSM / 4G connectivity, the PT104-4B delivers dependable communications where conventional telephones may not be suitable.

Ideal for factories, warehouses, transport hubs, utility facilities, rail infrastructure, ports, marine environments, tunnels, construction sites, car parks and public assistance points, the PT104-4B enables users to contact one of four independently programmed destinations with a single button press. The four-button configuration offers increased flexibility, allowing dedicated buttons for security, customer assistance, maintenance teams, control rooms, reception or emergency support.

Its corrosion-resistant die-cast aluminium housing, combined with an open access weatherproof design, protects against dust, moisture and harsh weather while providing immediate access to communications without the need to open a protective door.

Available in Yellow, Blue, Red and Grey finishes, the PT104-4B can be configured to suit virtually any industrial, commercial or public-access communications installation.

Heavy-Duty Construction for Demanding Environments

Designed specifically for harsh operating conditions, the PT104-4B features a corrosion-resistant die-cast aluminium enclosure finished with a durable industrial epoxy powder coating and an open access front panel.

The robust construction provides excellent resistance against dust, rain, moisture, impact damage, vandalism and prolonged outdoor exposure. Tamper-resistant mounting bars and security fixings provide additional protection, making the PT104-4B ideal for exposed installations where dependable communications are essential.

Built for continuous operation, the telephone delivers reliable performance across manufacturing facilities, transport infrastructure, utilities, marine installations, construction sites and public-access locations.

Four Button Push-to-Call Operation

The PT104-4B provides fast, intuitive operation using four vandal-resistant stainless-steel push buttons.

Each button can be independently programmed to automatically dial a different contact, allowing users to connect instantly without manually entering telephone numbers.

The four-button configuration offers maximum operational flexibility, providing direct access to multiple departments including Security, Customer Services, Reception, Control Rooms, Maintenance, Technical Support, Emergency Assistance or Site Management.

This makes the PT104-4B an ideal solution for transport facilities, industrial premises, public help points and customer assistance locations where multiple contact options are required.

Flexible Connectivity Options

The PT104-4B is available with Analogue, SIP or GSM / 4G connectivity, allowing seamless integration into both existing and modern communications infrastructures.

Analogue Version

The analogue model connects directly to standard analogue telephone lines and analogue PABX systems. Powered directly from the telephone line, it provides a simple and dependable communications solution for sites using traditional telephony.

Features include push-to-call autodial, incoming call support, DTMF remote programming, an internal programming keypad and integrated lightning protection.

SIP Version

The SIP model supports SIP 2.0 (RFC3261) and integrates easily with SIP PBX systems, hosted VoIP platforms and enterprise IP networks.

Features include dual SIP server registration, Power over Ethernet (PoE), web-based configuration, full-duplex audio and support for industry-standard voice codecs, making it ideal for modern IP communications.

GSM / 4G Version

The GSM / 4G model operates over the mobile network using a Micro SIM card, providing reliable communications where fixed telephone lines or network infrastructure are unavailable.

Remote SMS programming and status reporting simplify installation and ongoing management, making it particularly suitable for remote locations, temporary sites and critical infrastructure.

Clear Handsfree Communication

Designed for handsfree operation, the PT104-4B delivers clear, full-duplex two-way voice communication without requiring a handset.

Its handsfree design improves reliability, reduces wear and minimises maintenance requirements, making it particularly well suited to busy industrial and public-access environments.

Open Access Weatherproof Design

Unlike traditional weatherproof telephones fitted with protective front doors, the PT104-4B features an open access weatherproof design that provides immediate access to all four push-to-call buttons without opening a protective cover.

Its IP66-rated enclosure protects internal components against dust, rain and water ingress while ensuring communications remain instantly accessible whenever assistance is required.

The sealed construction and corrosion-resistant housing make the PT104-4B suitable for year-round installation in demanding industrial, transport and public-access environments.

Accessibility & User Safety

Where hearing aid compatibility is required, an optional inductive coupler can be supplied.

*Note - The hearing aid symbol shown in product images is for illustrative purposes only. The inductive coupler is available on request at additional cost.

The PT104-4B also incorporates non-volatile memory, retaining programmed settings during power interruptions to ensure reliable operation while reducing maintenance requirements throughout the product's service life.

Features

• Heavy-Duty Push-to-Call Outdoor Phone
• Open Access Weatherproof Design
• Four Independently Programmable Stainless-Steel Push-to-Call Buttons
• Available with Analogue, SIP or GSM / 4G Connectivity
• Designed for Harsh Outdoor and Industrial Environments
• Available in Yellow, Blue, Red and Grey Finishes
• Handsfree High Quality Two-Way Voice Communication
• IP66 Weatherproof Protection
• IP67 Version Available on Request
• Corrosion-Resistant Die-Cast Aluminium Housing
• Industrial Epoxy Powder-Coated Finish
• Vandal-Resistant Construction
• Non-Volatile Memory
• Remote Configuration (Version Dependent)
• Optional Dry Contact Relay Outputs
• Lightning & Transient Protection (Analogue Version Only)
• Optional Inductive Coupler for Hearing Aid Compatibility
• MTBF Exceeding 50,000 Hours
• CE, FCC & RoHS Compliant

Specifications

Connectivity Options

Analogue Version

• Standard Analogue Telephone Line Connection
• Compatible with PSTN Networks
• Compatible with Analogue PABX Systems
• Push-to-Call Autodial Function
• Incoming Call Capability
• DTMF Remote Programming
• Internal Programming Keypad
• Powered Directly from Telephone Line
• MF (Tone) Dialling
• Lightning & Transient Protection to ITU-T K.21 Enhanced Levels

SIP Version

• SIP 2.0 (RFC3261) Compatible
• Supports Registration with Two SIP Servers
• WAN Port - 10/100Base-T RJ45 Auto MDIX
• LAN Port - 10/100Base-T RJ45 Auto MDIX
• Power Supply - PoE or Optional 12V DC PSU
• Web-Based Configuration Interface
• SIP Domain & Authentication Support
• DHCP Support, PPPoE Support, VLAN Support, STUN Support
• Bridge Mode Support
• Supports G.711 A-law / μ-law, G.722, G.723.1, G.726 & G.729 Codecs
• Acoustic Echo Cancellation (G.168)
• Full Duplex Voice Communication

GSM / 4G Version

• GSM / 4G Mobile Network Operation
• Micro SIM Card Support
• SMS Remote Programming
• SMS Remote Status Reporting
• 4G LTE FDD - B1 / B3 / B5 / B7 / B8 / B20
• LTE TDD - B38 / B40 / B41
• WCDMA - B1 / B5 / B8
• GSM - B3 / B8
• Power Input - 7.4V–12V DC
• Idle Current - 75mA
• Off-Hook Current - 160mA

Audio Features

• Handsfree Full Duplex Voice Communication
• High-Quality Two-Way Audio
• 80–90 dBA Ringing Volume (Version Dependent)

Construction

• Corrosion-Resistant Die-Cast Aluminium Housing
• Industrial Epoxy Powder-Coated Finish
• Four Stainless-Steel Push Buttons
• Open Access Front Panel Design
• Tamper-Resistant Mounting Bars
• Vandal-Resistant Construction

Protection Features

• IP66 Weatherproof Protection
• IP67 Available on Request
• EN60529 Compliant
• Lightning Protection (Analogue Version Only)
• Vandal-Resistant Design

Accessibility

• Optional Inductive Coupler for Hearing Aid Compatibility (Available on Request – Additional Charge Applies)

Environmental Specifications

• Operating Temperature: -30°C to +65°C
• Storage Temperature: -40°C to +75°C
• MTBF Exceeding 50,000 Hours

Compliance

• CE Certified
• FCC Compliant
• RoHS Compliant

Dimensions & Weight

• Dimensions - 204 × 334 × 74mm
• Gross Weight - 6kg

Package Contents

• Project Telecom PT104-4B 4 Button Push-to-Call Outdoor Phone with Open Access Front (Connectivity and Colour Option to be Selected at Checkout)
• Tamper-Resistant Mounting Hardware
• User Documentation