Best Dual Sip Phone

Grandstream GXV3380 VOIP Video Phone for Android

Android 7.0 video phone with 16 lines/SIP accounts.
8” 1280x800 capacitive touch screen IPS LCD, 2 megapixel camera with privacy shutter, dual microphones.
Powerful hardware design to support 3-way local conferencing with 1080p30 H.264 and 48KHz full-band audio (Opus).
Dual Gigabit network ports with PoE/PoE+, integrated dual-band 802.11ac WiFi and Bluetooth 4.2.
HDMI-In port for remote screen sharing, HDMI-Out, USB, Micro-SD.

Audio Quality: High Definition speech technology for crystal-clear conversations and full-duplex speakerphone with built-in Class D amplifier and audio equalizer.
Large Vivid Color Display: OBi1022 voice phone offers user-configured themes and multi-dimensional navigation.
Easy Deployment and Administration: Easily configure and roll-out services and provide ongoing fast support with the OBiTALK cloud-based management platform.
Comprehensive Support: In addition to support for most industry-standard SIP-based voice services, this OBi IP phone adds support for Google Voice as well as device-to-device calling using the OBiTALK voice protocol.
Power over Ethernet: WiFi SIP phone features dual Ethernet ports with Power over Ethernet (PoE) support - external 12v power supply included.

Grandstream UCM6204 IP PBX with 4 FXO + GXP2170 4-UNITS IP Phone.
The GXP2170 is a powerful enterprise-grade IP phone features up to 12 line keys/line appearances and 6 SIP accounts using a 4.3 inch color display LCD and full HD audio..
The GXP2170 supports the fastest possible connection speeds with dual Gigabit network ports, features integrated PoE and includes built-in Bluetooth for syncing with mobile devices and Bluetooth headsets..
UCM6204 - SMB IP PBX with 4 FXO and 2 FXS Ports.
UCM6204 - Dual Gigabit RJ45 ports with integrated PoE Plus (IEEE 802.3at-2009).

The GXP1630 is a powerful IP phone for small-to-medium businesses (SMBs)..
Focused primarily for low to medium call volumes and efficient call handling, its 3 line/SIP account design and 8 dual-colored BLF/speed dial keys gives this versatility..
The GXP1630 also supports the best possible connection speeds and call quality with its dual Gigabit ports and HD audio on both speakerphone and handset..
With other features such as its integrated PoE, 3 XML programmable soft keys and 4-way conferencing support, the GXP1630 is a high-quality and versatile Basic IP phone..
The GXP1630 supports a variety of automated provisioning options, including zero-configuration with Grandstream’s UCM series IP PBXs, encrypted XML files and TR-069, to make mass deployment extremely easy..

3-line business-class IP phone. THIS IS NOT A STANDARD HOME PHONE!.
Connects directly to an Internet telephone service provider or to an IP private branch exchange (PBX)..
Dual switched Ethernet ports, speakerphone, caller ID, call hold, conferencing, and more..
Easy installation and highly secure remote provisioning, as well as menu-based and web-based configuration..
Supports both Session Initiation Protocol (SIP) and Smart Phone Control Protocol (SPCP) with the Cisco Unified Communications 500 Series.

The SIP Cordless Phone System expands up to 6 additional TPA50 handsets..
The KX-TGP500 SIP Cordless Phone System allows you to have up to eight (8) phone numbers.
2.1" Large LCD with white back light on cordless handset.
Support for 3 simultaneous network conversations.

Fanvil X7C Enterprise IP Phone 20 SIP Lines Color Display Bluetooth WiFi Dual Gigabit Ports HD Audio.
Fanvil X7C is a high-end enterprise IP phone for business users who need immediate access to all of their important information..
Built-in Bluetooth for connecting Bluetooth headset.
Wi-Fi connectivity (via Wi-Fi dongle, sold separately).
Video codec H.264 support for receiving video calls.

Internet phone adapter - With it, you can easily achieve long distance calls or free global calls along with broadband network, router, orinary telephone.(Broadband network + router + Gateway + ordinary telephone = save domestic or international long distance calls or free global calls.).
Phone Adapter with 2 Ports for Voice-over-IP.Comes with a network cable..
Lightweight and portable.Support SIP V2 protocol..
Port: 1 10/100 M RJ-45 network interface, 2 standard telephone interfaces, 1 power interface Cable Type: RJ45 Category 5 twisted pair.
RJ11 standard telephone line Base Indicator: Power, Ethernet, telephone (1-2).
User Instruction: 1. Broadband network + router + Gateway + ordinary telephone = save domestic or international long distance calls or free global calls. 2. Broadband network + router + Gateway + telephone program-controlled switch + ordinary telephone = save domestic or international long-distance calls or free global calls. 3. For Cisco Dual Port Gateway has a fax feature. Support SIP protocol.