Yeastar S20 PBX 20 Users up to 4 FXO

Tax excluded

Yeastar S-Series is a small factor green power IP PBX which is cost-effective for small size office with some 20 users. We easy to configure and maintain. It can save your telephone bill using one SIM card (purchased separately )


The yeastar IP PBX S Series work out of box with various IP Phones especially yealink and Fanvil. It can take up to 4 PTCL (POTS) lines for trunking and 1 GSM Network. Intuitive user interface and no-locking of all firmware and software makes it perfect choice for entry level PBX system.

Product Benefits

  • Works with SIP/IAX2, PSTN lines, ISDN BRI, E1/T1/PRI, and GSM/CDMA/3G
  • Built-in call recording capability
  • Powerful Apps (add-ons) include Auto Provision, LDAP, and more coming soon
  • Free lifetime software/firmware upgrade and above all, it's super easy
  • Connect multiple sites and remote users instantly
  • No hidden charges and extra licensing fees
  • Low power consumption (1.8 to 59.1 W)

Product Specifications

  • Users: 20
  • Max Concurrent Calls: 10
  • Max Analog Ports: 4
  • Max BRI Ports: 4
  • VoIP Trunks: 20
  • Protocol: SIP (RFC3261), IAX2
  • Transport Protocol: UDP, TCP, TLS, SRTP
  • Codec: G.711 (alaw/ulaw), G.722, G.726, G.729A, GSM, Speex, ADPCM, iLBC, H.263, H.263P, H.264, MPEG4
  • DTMF: In-band, RFC4733, RFC2833, SIP INFO
  • LAN: 1 x 10/100 Mbps
  • WAN: 1 x 10/100 Mbps
  • IP Services: Static IP, DHCP, VPN, Firewall, VLAN, DDNS, PPPoE, QoS, Static NAT,STUN
  • Voicemail: 5000 min (expandable)
  • Firewall: Yes
  • T.38 Fax: Yes
  • App Center: Yes
  • External Storage: TF card
  • Power: DC 12V 1A
  • Size: 16 x 16 x 3 cm (6.3 x 6.3 x 1.18 ')
  • Weight: 0.3 kg (0.66 lbs)
  • Power Consumption: 1.8 to 10.6 W


  • Operation Temperature: 0 to 40°C (32 to 104°F)
  • Storage Temperature: -20 to 65°C (-4 to 149°F)
  • Humidity: 10 to 90% non-condensing
  • Mounting: Desktop and Wall-Mount

Product Includes

  • (1) S20 PBX
  • (2) Telephony Line
  • (1) Power Adapter
  • (1) Network Cable
  • (4) Rubber Feet
  • Warranty Card
  • (1) Quick Start Guide
Product Details

Data sheet

CodecG711 (alaw/ulaw), G722, G726, G729A, GSM, Speex, ADPCM, iLBC, H263, H263P, H264, MPEG4
DC PowerDC 12V 1A
Dimensions16 x 16 x 3
DTMFIn-band, RFC4733, RFC2833, SIP INFO
RJ45 Ports2 × 10/100 Mbps
External StorageTF Card
FXO Ports4
FXS Ports4
Max Concurrent Calls10
MountingDesktop & Wall-mount
VoIP Trunks20


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