Description
20 Users, Max 4 FXS / FXO ports, Max 4 BRI ports, Max 1 GSM, Auto Call Recording
Core Telephony Features
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Automated Attendant (IVR)
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Attended Transfer
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AutoCLIP
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Blind Transfer
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Blocklist / Allowlist
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Call Back
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Call Detail Records (CDR)
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Call Forwarding
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Call Monitor
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Call Parking
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Call Pickup
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Call Recording
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Call Routing
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Call Waiting (FXS)
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Caller ID
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Contacts Management
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Custom Prompts
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Dial by Name
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DISA (Direct Inward System Access)
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Distinctive Ringtone
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DNIS Support
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Do Not Disturb (DND)
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Event Center
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Email-to-SMS / SMS-to-Email
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Fax-to-Email
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Paging / Intercom
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LDAP
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Linkus UC Clients
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Linkus Cloud Service*
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Mobility Extension
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Multi-language System Prompts
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Multi-language Interface
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Multi-site Interconnect
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Music on Hold
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One-Touch Recording
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Queue
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PIN List
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Phone Provisioning
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Real-time Status Monitoring
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Remote Management
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Ring Group
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SIP Forking
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SLA
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Speed Dial
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Time Conditions
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User Portal
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User Permission Control
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Voicemail
Model Comparison: S412 / S20 / S50
System Capacity
| Feature | S412 | S20 | S50 |
|---|---|---|---|
| Users | 20 | 20 | 50 |
| Max Concurrent Calls | 8 | 10 | 25 |
| Max FXS Ports | 12 | 4 | 8 |
| Max FXO/BRI Ports | 4 | 4 | 8 |
| Max 3G/4G Ports | 2 | 1 | 4 |
| Max 4G (Data) Ports | 1 | 1 | 0 |
| VoIP Trunks | 4 | 20 | 50 |
Protocols & Codec Support
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Protocols: SIP (RFC3261), IAX2
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Transport: UDP, TCP, TLS, SRTP
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Codecs:
G.711 (A-law/U-law), G.722, G.726, G.729A, GSM, Speex, ADPCM, iLBC, H.263, H.263P, H.264, MPEG4 -
DTMF: In-band, RFC4733/RFC2833, SIP INFO
Networking
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Ethernet Interfaces:
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S412: 2 × 10/100 Mbps
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S20 & S50: 2 × 10/100/1000 Mbps
-
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IP Services: Static IP, DHCP, VPN, Firewall, VLAN, DDNS, PPPoE, QoS, Static NAT, STUN
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Voicemail Storage: 5000 minutes (expandable)
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Company Contacts:
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S50 only: Up to 2000 entries
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Security & Reliability
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Built-in Firewall
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T.38 Fax Support
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Hot Standby
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External Storage:
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S412 / S20: TF Card
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S50: SD Card
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Applications & Integrations
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Supported Apps:
Linkus, Auto Provisioning, LDAP Server, Conference Panel, VPN Server, Billing*, Hotel*, MIKO CTI*, Yeastar CTI, Zoho*, QueueMetrics*
(*Requires license; V4 hardware may not support certain apps)
Power & Physical
| Model | Power | Size (cm) | Weight |
|---|---|---|---|
| S412 | DC 12V 3.33A | 29 × 18 × 3.3 | 0.68 kg |
| S20 | DC 12V 1A | 16 × 16 × 3 | 0.3 kg |
| S50 | AC 100–240V, 50/60Hz, 0.6A max | 34 × 21 × 4.4 | 1.48 kg |
Environmental
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Operating Temp: 0°C to 40°C (32°F to 104°F)
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Storage Temp: –20°C to +65°C (–4°F to 149°F)
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Humidity: 10–90% non-condensing
Mounting
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S412: Desktop & Wall-mount
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S20: Desktop
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S50: 1U Rack-mount
