Yard Duty Phones

The revolutionary EnGenius Durafon Cordless Systems for Yard Duty, Sick Bays and other vast areas are crystal clear over long distances and ideal where a number of handsets are required.

EnGenius Durafon is the cordless communications tool that goes the distance in any business, it uses two-way radio technology to cover the extra distance needed for factories, farms, offices, warehouses, car dealerships, motels, resorts, caravan parks, nurseries, hospitals homes and more.  

The Engenius provides mobility, flexibility and freedom. Add the many user-friendly convenience features and you have the ultimate in versatile, powerful cordless phone systems ideal for schools and even businesses of every size.

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Long Range SIP Cordless Phone System

engenius durafon -sn935 yard duty phones
engenius durafon -sn933 yard duty phone

Indoor Applications

Suitable for:
Warehouses, factories, retail & schools.

Light Of Sight Range

Suitable for:
Resorts, caravan parks & golf courses.

In-Building Coverage

Suitable for:
Hotels and office blocks.

Open Space Coverage

Suitable for:
Schools, Mining, airports & nurseries.

Person-To-Person Calling

If your people are on the move, no longer do they have to be paged or called on mobile when a call comes in. When installed with a key-phone system, reception can simply direct the call to the individual’s EnGenius handset, wherever he or she may be on site. Caller ID to the handset allows the employee to take the call or send to voicemail. Features including group paging (up to nine groups) and broadcast are ideal where emergency contact may be required.

Expandable System Design

EnGenius Durafon is flexible. Additional handsets and base units are available separately. Build a system that grows as your needs grow.
• One or four-line models. Up to 90 handsets
• Durafon 1x SN902 single line, with one line per base unit, up to a maximum of four base units and 36 handsets.
• SN933 Durafon Office combines sleek looks with features similar to the SN902 Industrial. One base unit supports up to 9 handsets.
• Durafon SP9228 Pro multi-base system, with four lines per base unit, up to a maximum of 8 base units and 90 handsets.

Cost Savings

Personnel can keep in contact with the no-cost handset to handset calls instead of using mobile phones on site. Consider the savings this could give your business.
The industrial strength cordless: The double-coated rubber case ensures durability in any work environment. The case is shock-resistant and features an integrated handgrip and low-profile antenna.

Workplace Security

Schools and large workspaces around Australia are using EnGenius to provide security within and around perimeters.

Ultra-Long Range

With an external antenna, all models can achieve the ultra-long-range of 5 km to 10 km, depending on the environment. The more open the area, the greater the distance covered. A range of over 5km is not unusual for Durafon in open areas.

Security and Comfort for Sole Workers

SP9228 handsets can be voice paged from any mobile or telephone anywhere, providing workers with instant long-range communications.

EnGenius FS1, SN933 and Durafon SN902, SP9228 and SN901 Features

  • Two-way radio, independent of the base unit. Gives handset to handset communication.
  • Rugged splash-proof housing*
  • Broadcast facility – direct announcement to all handsets or a group of handsets*
  • SMS messaging between handsets*
  • PABX compatible
  • Programmable PABX option key
  • Call Manager. Program handsets by individual base unit to receive calls or transfer calls only*
  • Caller ID and Caller ID on Call Waiting tones 30 calls (network dependent)
  • PBX call transfer – announced or unannounced
  • Intercom call transfer – announced or unannounced*
  • High capacity Li-ion battery. 6 hours’ talk time and 50 hours’ standby time
  • Battery change with a call on hold
  • Vibration alert mode
  • Four-line illuminated LCD display
  • Digital privacy and clarity
  • Key-guard to prevent accidental dialling
  • 50 name/number speed dial memory
  • Auto power management
  • Call hold
  • Mute/flash/last number redial
  • Signal strength indicator
  • Six level volume control
  • Any key answer option
  • User-defined long-distance dialling prefix
  • Four level key-tone volume
  • Low battery alarm and display
  • Four selectable key-tones
  • Hearing aid compatible
  • Two handset antennas included
  • Audio in socket for music or message on hold*
  • Headset socket
  • Car charger socket*
  • Convenient belt clip
  • Wireless door station compatible*
  • Door release relay compatible
  • Optional high gain outdoor antennae
  • Call timer

FAQ: EnGenius DuraFon Phones

EnGenius DuraFon phones are known for their durability, long-range capabilities, and versatility in various work environments.

Here’s a comprehensive FAQ for those considering EnGenius DuraFon phones for their communication needs.

The range of EnGenius DuraFon phones varies by model and environment. In general, they can cover up to 12 floors in a building, 250,000 sq. ft. in a warehouse, and up to 3,000 acres in open land conditions. However, these ranges are optimal and can be affected by physical obstructions and interference from other devices.

Yes, EnGenius DuraFon systems support multiple handsets. The exact number depends on the specific model. Some systems can support up to 90 handsets, making them ideal for businesses of various sizes.

EnGenius DuraFon phones are designed for durability. They are rugged and can withstand drops, shocks, and rough handling, making them suitable for industrial environments, construction sites, and outdoor use.

Yes, EnGenius DuraFon phones can integrate with most PBX systems. This allows for a seamless communication network within your organisation, utilising the DuraFon’s long-range capabilities alongside your existing infrastructure.

Battery life varies by model but EnGenius DuraFon phones are designed for long-lasting performance. Typically, you can expect 6-12 hours of talk time and up to 50 hours of standby time, ensuring that your team stays connected throughout the workday.

Absolutely. EnGenius DuraFon phones are versatile and suitable for both office environments and fieldwork. Their long range and durability make them ideal for various settings, including warehouses, farms, and large campuses.

Yes, there are numerous accessories available, including extra batteries, chargers, antennas, holsters, and headsets, allowing you to customise your EnGenius DuraFon experience to fit your specific needs.

Setting up your EnGenius DuraFon system is straightforward. It involves connecting the base unit to your phone line or PBX and charging and registering the handsets with the base unit. Detailed instructions are included with your purchase, and customer support is available for any setup assistance.

By addressing these FAQs, Teltech aims to ensure that potential and current users have all the information they need to make informed decisions about their long-range communication needs. Whether you’re managing a large facility or need reliable communication for outdoor work, EnGenius DuraFon phones offer a robust solution.

EnGenius Freestyl SIP SP935 Interactive Guide

AntennaReceiver4-line LCDVolume Control / ScrollingBroadcast KeyTalk/Flash/For SIP2-Way/IntercomEnd & Power ON/OFF KeyMicrophoneLeft KeyRight KeyDial Pad




a. Rings to an incoming call and intercom call.

b. Distinctive alert sounds indicating various events:

  1. Single beep: successful key entry
  2. Double beep: indicates power on/off
  3. Triple beep: failed operation
  4. Periodic 1-Long 2-Short beeps (every 1 minute): low battery warning; out of range; call on hold.

Re: No beep: invalid key entry.

4-line LCD

4-Line LCD (Liquid Crystal Display)

a. The LCD display has LED (Light Emitting Diode) for backlighting.

b. The 1st line of LCD consists of icons.

c. Icons explanation from left to right

RSSI level (Receive Signal Strength Indicator)

  • During a call, the number of bars is proportional to the radio signal strength received.

Link mode

  • Call in progress (ON/OFF-Hook) - Indicates if the phone line is in the OFF-Hook status.
  • Intercom in-progress
    • Indicates if Intercom mode is active.
    • Indicates the Handset ID that is sending the intercom call.

Line, Sound and Indication

  • Line Indicator - Indicates when using line 1 or the incoming call from FXO line.
  • SIP Indicator - Indicates when using SIP or the incoming call from SIP.
  • Enable ringer
  • Disable ringer
  • Ringer and vibrate mode
  • Vibrate mode
  • Message waiting indicator

Disable PA and indicate speakerphone

  • Indicates if the incoming broadcast is disabled.
  • Speaker indicator - Indicates if the speakerphone is active.

Two-Digit Handset ID

  • Displays the 2-digit Handset ID of the owner.

Battery Strength

  • The number of bars is proportional to the amount of battery time remaining.

d. The 2nd and 3rd lines of the LCD, maximum 16-characters each, display status, message, menu selections, or user-editable alphanumerical characters.

e. The last line displays the left and right soft keys.

Volume Control / Scrolling

a. Scroll through records and menu selections.
b. Adjust receiver voice volume when in Talk mode.
c. Press UP to enter the received call log when in the Standby mode.
d. Press DOWN to enter the phonebook when in Standby mode.

Broadcast Key

a. Half duplex broadcasting to handsets for an immediate announcement.
b. Half duplex broadcasting to base stations.
Re: Press the key on the left top corner of the handset to activate the broadcast function.

Talk/Flash/For SIP


a. Places or answers a telephone or intercom call.
b. Sends a Flash signal to the phone line to retrieve a dial tone after the call ends, or to perform the Call Waiting feature provided by local phone companies during a call.
Press and hold the key for over 2-seconds to enable/disable the speakerphone during incoming, outgoing or intercom call.


a. Places an intercom call to another handset, a group handset (group paging) or all registered handsets.
b. Intercom calls are digital, full duplex, and are conducted without the assistance of the base station.

End & Power ON/OFF Key

a. Ends a call.
b. Leaves current menu operation, up one level.
c. Press for 3-seconds to turn off the power.


Left Key

Left direction to make a menu selection.

Right Key

Right direction to make a menu selection.

Dial Pad

Alphanumeric Dial Pad