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