EnGenius DuraFon-SIP is a long range Industrial grade cordless phone system for the VOIP system. DuraFon-SIP supports both SIP and one analog phone line. It's ideal for locations with existing IP-PBX system (such as Cisco, Avaya or Polycom) on the premises or those using hosted VoIP services. DuraFon-SIP handset is durable and rugged. Its Handset is designed for use in harsh environments. It's been tested to 6-foot drops and over 50 times onto concrete floors without failing. It uses 900MHz FHSS (Frequency Hopping Spread Spectrum) technology, the DuraFon-SIP provides secure communications.. 

Key Features:

• DuraFon-SIP base Supports up to Four (4) Concurrent Calls (4-SIP OR 3-SIP+1-PSTN Analog)
• Works with any IP-PBX that Supports the Standard SIP Protocol
• Range: Up to 12 floors in-building penetration; 250,000 square feet in manufacturing plants, warehouses; 3,000 acres on farms or ranches
• Two-way radio - full duplex, no group chatter or push-to-talk, can be used even when out of range of base unit, Handset-to-Handset, Handset-to-Base or Base-to-Handset
• Push-to-Talk (PTT) feature, allowing users to create one-way communications for 1-to-All or 1-to-A Handset Group for instant response.
• Caller ID w/call waiting
• DuraFon-SIP system supports up to 10 handsets
• Optional Durafon external antenna for indoor use in warehouses and manufacturing plant or outdoor use on farms and car lots

Optional DuraFon-SIP Accessories:

• EnGenius DuraFon SIP Handset DURAFON-SIP-HC
• EnGenius DuraFon-SIP External Antenna
• EnGenius DuraFon SIP Base Unit

​For more information see EnGenius DuraFon-SIP datasheet, also EnGeniusDuraFon-SIP FAQ