Yeastar S412 is a modular IP PBX for small businesses with auto-provisioning capabilities for major VoIP brands, including Polycom, Cisco, Grandstream, Snom, and Yealink. S412 supports up to 8 SIP accounts, 4 SIP trunks, 12 analog lines, 4 digital lines, or 2 cellular lines. It comes pre-configured with 8 fixed FXS ports. It offers 4 on-board module slots for customization: 2 for internal extensions and 2 for external lines. Customize your Yealink IP PBX with the following modules:

• S2 Module: 2 FXS Ports
• O2 Module: 2 FXO Ports
• SO Module: 1 FXS Port & 1 FXO Port
• B2 Module: 2 BRI Ports
• GSM Module: 1 GSM Channel
• 3G Module: 1 WCDMA Channel
• 4G LTE Module: 1 3G/4G Voice Call & Data

Yeastar S412 thus provides a flexible, cost-effective VoIP telephony control center. It gives you an incredible array of over 50 telephony features, including fax-to-email, call monitoring, automated attendant, and one-touch recording. You get an embedded Yeastar App Center with a wealth of S-Series apps to extend functionality. The Linkus Mobile Client lets you make your Android or iOS smartphone into a business softphone.

Yeastar S412 IP PBX Quick Specs:

• Communications Protocols: SIP, IAX2
• Module Slots: 4
• Physical Interfaces:
  • 1x WAN 10/100 Ethernet Port
  • 1x LAN 10/100 Ethernet Port
  • 1x TF Card Slot
• Users: 20
• Concurrent Calls: 8
• Maximum Ports with Modules (Not Included):
• FXS Ports: 12
• FXO/BRI Ports: 4
• GSM/3G/4G Channels: 2
• 4G Channels (Data): 1
• E1/T1/PRI Ports: 0
• VoIP Trunks: 4
• Audio Codecs: G.711u/a, G.722, G.726, G.729A, GSM, Speex, ADPCM, iLBC
• Video Codecs: H.263, H.263P, H.264, MPEG4
• Fax Over IP: T.38
• Mounting: desktop, wall

Yeastar S412 20 User 8 Concurrent Calls IP Phone System Package Contents:

• Yeastar S412 IP PBX
• Power Adapter
• Ethernet Cable
• 4x Rubber Feet
• Warranty Card
• Quick Installation Guide