S412

Manufacturer reference

Manufacturer details describe the cited version. Confirm the exact unit and intended system.

Capacity and selection

Device class

VoIP PBX

Fixed FXS ports

8 fixed FXS ports; these are not the four fixed ports of S412 Lite.

Module slots

4 module slots with dedicated internal-extension and external-line roles.

Internal-extension slots

2 slots for internal extensions, S2 Module only.

External-line slots

2 slots for external lines, O2 / BRI / 3G/4G Module only.

Maximum concurrent calls

8 concurrent calls; not the same metric as user capacity.

Maximum FXS ports

12 FXS ports with appropriate configuration; not twelve included extension modules.

Maximum FXO / BRI ports

4 FXO/BRI ports, depending on the selected module mix; not four of each simultaneously.

Cellular interface ceiling

Up to 2 3G/4G interfaces depending on module, operator, network and configuration.

4G data-port ceiling

Up to 1 4G data port in the S412 document column; module/carrier support still needs checking.

VoIP trunks

4 VoIP trunks in the S412 reference column; not four included paid carrier services.

Signalling protocols

SIP (RFC3261) and IAX2; confirm the required trunk configuration.

Transport references

UDP, TCP, TLS and SRTP are listed; this is not a current security or interoperability guarantee.

Codec references

G.711 A/μ-law, G.722, G.726, G.729A, GSM, Speex, ADPCM, iLBC, H.263, H.263P, H.264 and MPEG4; exact endpoint/firmware negotiation still applies.

Interfaces and operating requirements

DTMF references

In-band, RFC4733, RFC2833 and SIP INFO

Ethernet interfaces

2 × 10/100 Mbps Ethernet interfaces; separate from S50 Gigabit interfaces.

IP service references

Static IP, DHCP, VPN, firewall, VLAN, DDNS, PPPoE, QoS, static NAT and STUN; deployment needs its own configuration and security review.

Voicemail reference

5,000 minutes, expandable in the document; storage, media and configuration are not confirmed.

External recording storage

TF card reference; card and usable capacity require separate confirmation.

Power input reference

12 V DC, 3.33 A supply reference for S412; not a mains AC input or measured consumption.

Dimensions reference

29 × 18 × 3.3 cm (L × W × H) in the S412 table; allow separate installed cable clearance.

Weight reference

0.68 kg in the S412 table; package and fitted accessories not confirmed.

Operating temperature

0–40 °C

Storage temperature

−20–65 °C; not the operating-temperature range.

Humidity reference

10–90%, non-condensing

Mounting reference

Desktop or wall-mount reference; bracket, fasteners and local installation are not included.

Ethernet modes

Single (LAN uplink, WAN disabled), Bridge (WAN bridges a PC), or Dual (both ports for uplink).

Application and licence selection

The datasheet marks Linkus Cloud Service, Billing and Hotel features as extra-licence items; confirm current model/firmware/service eligibility before ordering.

Selection notes

• Confirm the complete supplied model, hardware version and firmware; optional boards, modules, licences, carrier service and local stock are not included or confirmed.
• Manufacturer references do not confirm ISD stock, price, delivery, package contents, local warranty or publication approval.
• S412 exact column/configuration only; port maxima require the appropriate optional modules, not a fully populated kit, and must not be substituted with S412 Lite or S20/S50 data.

Official documents

• Yeastar exact S412 product and module-slot reference
• Yeastar S-Series manufacturer datasheet / exact S412 column
• Yeastar S-Series installation guide / exact S100,S300,S412,D30 sections

Manufacturer source checked 2026-10-20. The supplied unit and local terms require confirmation.