DuraFon-SIP-BU is a base station. DuraFon® SIP Durable, Long-Range Cordless Phone Base Station for EnGenius' DuraFon SIP Cordless Phone System delivering durability and reliable long-range communications over large areas or in harsh environments in a flexible, multi-mode communications platform. The DuraFon SIP Cordless Phone System delivers industry-leading range, durability and reliability, in a flexible, multi-mode communications platform that provides users with the lowest total cost of ownership (TCO) in the industry. It is ideal for companies with an existing IP-PBX system on the premises or using hosted VoIP services that require reliable, long-range communications over large areas or in harsh environments. Such as, organizations whose staffs 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 Sports Arenas or Stadiums 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 Detail Specifications Buttons Volume UP Volume DOWN REG x 1 RESET x 1 Broadcast Intercom Jack Line x 1 LAN x 1 Audio-In x 1 Type-B USB x 1 DC x 1 Grounding LED Indicators POWER In-Use Intercom Broadcast Electrical Specifications Frequency:902-928 MHz RF Power: Peak: 708 mW Average: 354 mW Channel Spacing :200 kHz Number of Channels :128 Modulation :MSK Multiple Access :Frequency Hopping TDMA Frequency Hopping Rate :100 per second TDMA Frame Length :10 ms Number of Talk Paths :4 Receiver Sensitivity :< -108 dBm ( at BER 10-2) Antenna Connector :Reverse TNC Antenna Gain : 2 dBi (included) 6 dBi Outdoor (Optional) 2.7 dBi Indoor (Optional) Telephone Interface :RJ11 x 1 VoIP Interface :RJ45 x 1 Electrical Specifications continued Default IP Address :192.186.1.156 Default User Name and Pswd :admin/admin SIP Protocol :RFC 3261 Speech Coding : 64Kbps G.711a, G.711u 8 kbps G.729A Channel Coding :8 kbps Convolutional + CRC Transmission Data Rate :170.667 kbps User Data Rate :128 kbps Duplex Duplex :Time Division Duplex (TDD) Voice Quality :TIA/EIA-470B Number of System ID :65, 536 Ring Signal :20-50 Hz, 15-90 Vrms Flash Time :100-900 ms Programmable Power Source :100-240V/12V AC/DC Adapter Regulation Compliance FCC Part 15, Part 68 Item Dimension (LxWxH): 12.5 x 15.5 x 3.75 Weight: 4.38 lb Warranty Information: 1 Year