VOIP-111A je napredan uređaj baziran na SIP-u pa time ne zahtjeva računalo. Služi za pretvaranje analogne telefonske linije u VOIP uz potporu PSTN-a. Jednostavno priključite normalan telefon/fax u FXS ulaz i uređaj će ga pretvoriti u IP telefon/fax.
VOIP-111A podržava 1FXS + 1PSTN ulaz za potporu koji može obavljati 1 IP poziv preko VOIP operatera ili putem klasične PSTN mreže. Uređaj dolazi sa IP sharing funkcijom tako da možete dijeliti internet vezu između VoIP-a i drugih računala u mreži.

Network Protocol
- SIP v1 (RFC2543), v2 (RFC3261)
- IP/TCP/UDP/RTP/RTCP
- IP/ICMP/ARP/RARP/SNTP
- TFTP Client/DHCP Client/ PPPoE Client
- Telnet/HTTP Server
- NAT/DHCP Server

Codec
- G.711: 64k bit/s (PCM)
- G.726: 16k / 24k / 32k / 40k bit/s (ADPCM)
- G.729A: 8k bit/s (CS-ACELP)
- G.729B: adds VAD & CNG to G.729

Voice Quality
- VAD: Voice activity detection.
- CNG: Comfortable noise generator
- LEC: Line echo canceller
- Packet Loss Compensation
- Adaptive Jitter Buffer

Call Function
- Call Hold
- Call Waiting
- Call Forward
- Caller ID
- 3-way Conference

DTMF Function
- In-Band DTMF
- Out-of Band DTMF
- SIP info

SIP Server
- Registrar Server (three SIP account)
- Outbound Proxy

Tone:
- Ring Tone
- Ring Back Tone
- Dial Tone
- Busy Tone
- Programming Tone

Phone Function
- Volume Adjustment
- Speed dial key
- Phone book
- Flash

IP Assignment
- Static IP
- DHCP
- PPPoE

FAX
- T.38 FAX relay

Security
- HTTP 1.1 basic/digest authentication for

Web setup
- MD5 for SIP authentication (RFC2069/ RFC 2617)

QoS
- ToS field

NAT Traversal
- STUN

Configuration
- Web Browser
- Console/Telnet
- IVR/Keypad

Firmware Upgrade
- TFTP
- Console
- HTTP

Enviroment
- AC Power: 110-220V , 60Hz
- Temperature: 0℃ to 40℃
- Hmidity: 10%~90%RH