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EnGenius DuraFon SIP
Durable, Long-Range SIP Cordless Phone System

EnGenius DuraFon SIP

EnGenius Products
EnGenius DuraFon SIP
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The DuraFon SIP is the first durable, long-range SIP cordless phone system. This multi-mode communications system delivers industry-leading range and durability while providing significantly lower CAPEX and OPEX compared to other SIP cordless phone solutions. It supports 10 handsets and 10 SIP accounts.

Product Highlights

  • Range up to 12 Floors, 250,000 Sq. Ft. or 3,000 Acres
  • Supports 10 SIP Accounts
  • Base Provides for up to four (4) Concurrent Calls
  • Works With any IP-PBX With Standard SIP Protocol

The DuraFon-SIP is the industry’s first durable, long-range SIP cordless phone. The DuraFon-SIP Cordless Phone System delivers industry-leading range, durability and reliability, in a flexible, multimode communications platform that provides users with the lowest total cost of ownership (TCO) in the industry. This durable, long-range SIP cordless phone provides up to 250,000 square feet of facility coverage, penetrates up to 12-floors for in-building coverage and up to 3,000 acres of property in open land coverage.

It supports both SIP and one PSTN line analog and is ideal for companies with an existing IP-PBX system on the premises or those using hosted VoIP services that require reliable, long-range communications over large areas or in harsh environments. Such as, organizations whose staff work on large properties outside of a conventional office, or venues where employees need to stay in constant contact with a main office or management team and where Wi-Fi or DECT phones can’t reach. These may include:

  • Large Resort Properties
  • Schools, Colleges and Universities
  • Golf Courses
  • Warehouses
  • High-Rise Hotels
  • Expansive Agricultural Properties
  • Industrial Plants
  • Oil and Gas Fields
  • Convention Centers
  • Amusement Parks
  • Assisted Living Facilities
  • Auto Dealerships
  • Retail and Grocery Stores

An expert in wireless communications and RF technology, EnGenius delivers feature-rich, long-range wireless communications technology for voice and data. The versatility and performance of the company’s solutions lower total cost of ownership, increase productivity and maximize efficiency and performance to a large number of clients simultaneously


Premises Mobility Communications Solution

DuraFon-SIP is a powerful, reliable, versatile multi-mode communications system that delivers industry-leading range and durability while providing significantly lower CAPEX and OPEX when compared to other SIP cordless phone solutions.

  • Lower CAPEX, faster deployments: DuraFon-SIP features EnGenius’ high-power, easy-to-deploy single-cell technology that covers up to 250,000 sq. ft. indoors, 3,000 acres outdoors and penetrates up to 12 floors, minimizing the amount of equipment required.
  • Reduced OPEX, less downtime: The proven durability of the DuraFon series – over 10 years of continued innovation and testing – ensures that the phones will survive in the most challenging environments where handsets are subjected to drops and shocks.
  • Flexible and easy-to-deploy: Easily configured via the Base Station web interface, DuraFon-SIP supports both PSTN and SIP functions, and works with any IP-PBX system that supports the standard SIP protocol. In addition to long-range connectivity, the multi-mode system also enables users to communicate via 2-Way Intercom and PTT Broadcast modes.

Flexible, Multi-Mode Communications

  • Independent 2-Way Intercom
    The DuraFon-SIP’s Handset provides direct handset-to-handset communication without going through the Base Station for quick contact with specific users without group chatter.
  • Broadcast Feature
    DuraFon-SIP offers the favored, “Push-to-Talk” feature through the Handset’s Broadcast button, allowing users to create 1-way communications for 1-to-All or 1-to-A Handset Group for instant response without the wait.
  • Dual Interface
    Support for both SIP and PSTN lines permit the connection of the Base Station to a legacy PBX, IP-PBX or preference service provider and gives users up to four (4) talk paths via four (4) digital calls or three (3) digital calls and one (1) analog line.

Easy Phone Book and System Configuration Management

Easily configure and manage the master phone book via the DuraFon-SIP Base Station Web Interface and effortlessly transfer updates to each Handset via air.

Durable, Ruggedized Design

The DuraFon-SIP’s durable, rugged Handset is designed for use in harsh environments and tested to withstand 6-foot drops, over 50 times onto concrete floors without breaks.

Superior Long-Range Performance

DuraFon-SIP implements a high-powered 900MHz proprietary air protocol, with high RF transmission and sensitivity to provide superior range and coverage for the industrial market; covering up to 250,000 sq. ft. indoors, 3,000 acres outdoors and penetrating up to 12 floors.

Highly Secure Wireless Communications

Adopting 900MHz (902~928MHz) FHSS (Frequency Hopping Spread Spectrum) technology, the DuraFon-SIP ensures secure communications during conversations.

Single Cell Technology Minimizes Equipment Needs, Saves Money

Designed to simplify deployment, the DuraFon-SIP features single cell technology that leverages a single 900 MHz Base Station for long-range coverage, eliminating the need for added Base Stations or repeaters, helping companies lower their capital expenses through faster deployment.

10-Years of Trusted Reliability

The DuraFon-SIP shares the trusted, proven durability of the popular DuraFon Series with over 10 years of continued innovation and testing that ensures the Handsets will survive in even the most challenging environments where they are subjected to drops and shocks.

Lowest Total Cost of Ownership Available for SIP Deployments

Unlike other SIP systems, the DuraFon-SIP offers the lowest TCO available for SIP deployments. By simplifying and expediting system deployments, the DuraFon SIP lowers overall equipment costs and ensures less downtime through its proven reliability, reducing overall operating expenses for the life of the system.

Operates Independently of Wi-Fi Networks

DuraFon-SIP operates independently of your existing Wi-Fi network, which means you don’t need to be concerned with roaming or QoS issues that are typical with voice communications on a WLAN. By using the 900MHz frequency, there is also no need to worry about the DuraFon-SIP causing interference to existing 2.4 GHz and 5 GHz Wi-Fi.


What is the default IP address, user name, and password?

IP Address:, User Name: admin, Password: admin

What bundles/packages are available?

System: DuraFon-SIP-System (Handset and Base), Handset only kits (DuraFon-SIP-HC), and Base (DuraFon-SIP-BU) only.

Can a DuraFon Pro Handset work with a DuraFon-SIP Base Station?

No, it cannot and a DuraFon SIP Handset will not work on a DuraFon PRO system either.

Is the DuraFon-SIP a multi-base system?

No. Even though more than one base can be used, keep in mind, 2-Way Intercom and “Push-to-Talk” features would not work across Handsets registered to different bases. Bases will also need to be > 30 feet apart to avoid self-interference.

Is a repeater base available as an option for DuraFon-SIP?


Does the DuraFon-SIP support TAP and text messaging?


Can a Handset receive a phone call during a 2-Way Intercom call conversation?

No. It is important to note; no missed call notification will occur either. For this reason, SIP-to-SIP calling from one handset to the other is the preferred method.

Are there DuraWalkie Handsets available to go along with the DuraFon-SIP System?


Is the DuraFon-SIP field firmware upgradable?

Base Stations can be, but Handsets cannot.

Is there a log file of call activity and history?


What is the maximum number of Handsets that can be registered to the system?


From the Base Station GUI, can you monitor or see if calls are in progress?


What frequency does the DuraFon-SIP use?

900MHz ISM band (FHSS 902-928MHz).

Will the DuraFon-SIP work with Wi-Fi and is it a Wi-Fi phone?

No. It uses its own 900MHz frequency and only works with its own matching Base Station.

What is the main advantage in using the DuraFon-SIP verses a standard DuraFon system?

It does not need analog ports.

  1. It can plug in anywhere there is Ehternet network connectivity. There is no need to run RJ11’s from the IDF/MDF.
  2. It has intercom/broadcast at the Base Station (like DuraFon 1x) (PRO does not).
  3. DuraFon-SIP support a maximum of 4-talk paths, 10 unique DN (ext. numbers) can be associated to the Base (with PRO, only 4 via 4 separate RJ11 connections).
  4. The DuraFon-SIP System is a network device with a unique IP address and can be remotely managed.
  5. The Base Station is field firmware upgradable.
  6. Its GUI supports easy access to advanced audio adjustment parameters and configuration files can be saved.

Will the DuraFon-SIP interfere with Wi-Fi networks?

No. Wi-Fi uses 2.4GHz and 5GHz, while the DuraFon SIP uses 900MHz. However, it is always recommended to keep the DuraFon system at least 3-feet away from any other electronics.

How many simultaneous calls can a Handset manage?


  1. To answer a second incoming SIP call from a different SIP extension (grouping): Press the “Switch” soft key.
  2. To answer a second incoming call coming from the PSTN line: Press the “Switch” soft key.
  3. To answer a second incoming call from a SIP extension while on a PSTN line call: Press the “Switch” soft key.
  4. To answer a second incoming call from the same SIP extension, where call is coming from the PBX call waiting feature: Press the “TALK/Flash” key to answer and press the “Switch” soft key to switch between the two calls (v1.05).

Can one Handset have more than one SIP account associated to it?

No. Each Handset ID has its own SIP account, but you can utilize grouping to access more than one extension.

What VoIP codecs are supported?

G.729 (v1.05), G.711a and G.711u

Does the DuraFon-SIP Handset support line appearances?


What’s the maximum SIP account password character length?

32 characters (F/W v1.05)

If two DuraFon-SIP Handsets (associated with different DuraFon-SIP Base Stations) were used behind the same PBX, can one Handset call another?

Yes. You can call via internal PBX extension-to-extension calling. You cannot however, 2-Way Intercom or Broadcast to the other Handset registered to a different DuraFon SIP Base.

What is the system’s range?

12-floors (in-building), 250,000 sq. ft. (warehouse), 3,000 acres (open area).

Can the DuraFon-SIP Handset conference calls?

Device Caller 2 Caller 3 Capable
DuraFon-SIP DuraFon-SIP Outside line YES
DuraFon-SIP PBX Desk-set Outside line YES
DuraFon-SIP Outside line Outside line YES
DuraFon-SIP DuraFon-SIP DuraFon-SIP YES
DuraFon-SIP DuraFon-SIP DuraFon-PSTN YES

What is the typical talk and standby time?

Typical talk time is 4-5 hours with standby up to 50 hours.

How do you change the settings so it automatically selects the SIP line when dialing out?

Note: Use the “up/down arrow” soft key to scroll: Press “Menu,” “4. Call Settings,” “3. Call Manager,” “Enter” Password: “0000” then press soft key “OK,” 2”. Outgoing,” then you can set it using 3 options: 1. Auto, 2. Manual, 3. Of

  1. Auto = will automatically choose the open line, either SIP or PSTN.
  2. Manual = user will choose the outbound port.
  3. Off = disable all outbound calls.

How many groups does the DuraFon-SIP support?

Groups allow a Handset to receive/make inbound calls from different SIP extensions (share). The maximum concurrent number of calls a handset can do is two (2).

Is the DuraFon-SIP Base Station PoE (Power-over-Ethernet) capable?


What is the Handset password?

The default Handset password is 0000.

How can I find out the IP address of the DuraFon-SIP Base Station?

From any registered handset: Press “Menu ####*”, scroll up/down to BS HW/SW Version and press: “select,” now scroll up/ down until you get to the IP address screen.


EnGenius DuraFon SIP Specifications
Electrical Specs Base Station Portable Handset
Frequency 902-928 MHz 902-928 MHz
RF Power Peak: 708 mW
Average: 354 mW
Peak: 708 mW
Average: 88.5 mW
Channel Spacing 200 kHz 200 kHz
Number of Channels 128 128
Modulation MSK MSK
Multiple Access Freq. Hopping TDMA Freq. Hopping TDMA
Freq. Hopping Rate 100 per second 100 per second
TDMA Frame Length 10 ms 10 ms
Number of Talk Paths 4 4
Reciever Sensitivity < -108 dBm (@ BER 10) < -108 dBm (@ BER 10)
Antenna Connector Reverse TNC Non-standard
Antenna Gain 2 dBi (included)
6 dBi Outdoor (Optional)
2.7 dBi Indoor (Optional)
2 dBi (Long)
0.5 dBi (Short)
TX Power Control Range N/A 100- 708 mW
Telephone Interface RJ11 x 4 N/A
VoIP Interface RJ45 x 1 N/A
Default IP Address N/A
Default User Name & Password admin/admin N/A
SIP Protocol RFC 3261 N/A
Speech Coding 64kbps G.711a, G.711u
8 kbps G.729A
8 kbps G.729A
Channel Coding 8 kbps Convolutional + CRC 8 kbps Convolutional + CRC
Transmission Data Rate 170.667 kbps 170.667 kbps
User Data Rate 128 kbps duplex 128 kbps duplex
Duplex Time Division Duplex (TDD) Time Division Duplex (TDD)
Voice Quality TIA / EIA -470B TIA / EIA -470B
Number of System ID 65,536 65,536
Ring Signal 20-50 Hz, 15-90 Vrms N/A
Flash Time 100 - 900 ms Programmable N/A
Power Source 100~240V/12V AC/DC Adapter 3.7V, 1700 mAh Li-ion Battery
Charger Time/Current N/A 4 Hours (from empty) @ 500 mA
Battery Talk & Standby Time N/A 6 Hours / 50 Hours
Physical Specifications Base Station Portable Handset
Buttons Volume UP
Volume DOWN
REG x 1
Left & Right Soft-Key
2-Way Intercom
End & Power
0-9, *, #
Jack Line x 1
LAN x 1
Audio-In x 1
Type-B USB x 1
DC x 1
LED Indicators POWER
Environmental & Physical Base Station Portable Handset
RegulationCompliance FCC Part 15, Part 68 FCC Part 15, Part 68
Operating Temperature 0 – 50 °C / 32 – 122 °F -10 – 60 °C / 14 – 140 °F
Storage Temperature -10 – 70 °C / 14 – 158 °F -10 – 70 °C / 14 – 158 °F
Humidity 20 - 75% 20 - 75%
Dimension without Antenna 161W x 42D x 188H (mm)
6.3” x 16.5” x 7.4”
161W x 58D x 31H (mm)
6.3” x 2.2” x 1.2”
Weight 1.9 lbs. 1.6 lbs.


DuraFon SIP Application


DuraFon-SIP Handset

DuraFon-SIP Base Station

DuraFon-SIP Charger


Download the EnGenius DuraFon SIP Datasheet (PDF).

Pricing Notes:

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