Ports | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | 16 FXO Ports |
Telephony Interfaces | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | RJ11 and RJ21 50-pin Telco Connectors |
LAN | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | 1 10/100Mbps |
Protocol | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | SIP (RFC3261), IAX2 |
Transport | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | UDP, TCP, TLS, SRTP |
Codec | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | G.711 (alaw/ulaw), G.722, G.723, G.726, G.729A, GSM, ADPCM |
Voice Capability | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | ITU-T G.168 LEC Echo Cancellation, Dynamic Jitter Buffer, VAD, CNG, PLC |
DTMF Mode | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | RFC2833, SIP Info, In-band |
Fax | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | T.30 |
QoS | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | DiffServ, ToS, 802.1 P/Q VLAN tagging |
Network | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | DHCP, DDNS, OpenVPN, PPPoE, Static Route, VLAN |
Network Protocol | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | FTP, TFTP, HTTP, HTTPS, SSH |
Management Protocol | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | TR-069* |
Signaling | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | FXO Loop Start, FXO Kewl Start |
Caller ID | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | BELL202, ETSI (V23), NTT (V23-Japan), and DTMF-based CID |
Disconnect Methods | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | Busy Tone, Polarity Reversal |
FXO Connectivity | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | Programmable AC Impedance, Hangup Detection, Answer Detection, Caller ID Detection |
Power | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | AC 100-240V (12V 5.5A) |
Dimensions (L × W × H) (mm) | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | 440 × 250 × 44 |
Humidity | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | 10-90% non-condensing |
Storage Range | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | -20°C to 65°C, -4°F to 149°F |
Operation Range | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | 0°C to 40°C, 32°F to 104°F |
Mounting | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | Desktop, Rack-mount |
Compatibility | ![](http://www.yeastar.com/wp-content/uploads/2016/05/ellipse.png) | Interoperable with 3CX, Asterisk, Lync Server, FreePBX and certified with Elastix and BroadSoft |