PPPoEをサポートしていますから、ほとんどのプロバイダーの回線に直接接続できます。

Enterprise, small office and residential applications
Key features:
SIP/IAX2 support.
Support two sip servers running at the same time.
Redundancy sip server capable.
NAT, Firewall.
DHCP client and server.
Support PPPoE, (used for ADSL, cable modem connecting).
Support major G7.xxx CODEC.
VAD,CNG.
G.165 compliant 16ms echo cancellation
E.164 dial plan and customized dial rules
Hotline.
Call Forward, Call Transfer, 3-way conference calls
Call ID display
DND(Do Not Disturb),Black List,Limit List

Data Features:
Static/Dynamic WAN-IP-Addressing
PPPoE

Management：
Web, telnet and keypad management.
Adjustable user password and super password
Upgrade firmware through HTTP, FTP or TFTP.
Telnet remote management.
Upload/download setting file
Auto-provision.
Safe mode provide reliability
Phone book, maximum 100 entries.

Interface：
Two RJ45 ports, one for WAN, one LAN.
Power port

仕様

ACアダプターはPSEに技術的には仕様を満たしていますが、認定マークは有効でありません。個人輸入者が自身でお使いに成る場合は問題ございませんが、転売、譲渡の際に責任が発生する場合がございます。

Supported specification and applications
Data networking:
MAC Address
TCP:Transmission Control Protocol
DHCP:Dynamic Host Configuration Protocol
PPPoE:PPP Protocol over Ethernet
POE(option)
SNTP, Simple Network Time Protocol
STUN - Simple Traversal of User Datagram ...
MD5 Message-Digest Algorithm
DNS：Domain Name Server
RTP: Real-time Transport Protocol
RTCP:Real-time Control Protocol
Telnet:Internet's remote login protocol
HTTP:Hyper Text Transfer protocol
FTP:File Transfer protocol
TFTP:Trivial File Transfer Protocol

Call control /voip Features
SIP RFC3261,RFC 2543
Tone generation and Local DTMF re-generation according with ITU-T
G.711(A-law or u-law)
G.723.1(6.3kbps,5.3 kbps)
G729
AGC(Auto Gain Control)
G.168/165 compliant 16ms echo cancellation
AEC(Auto Echo Cancellation)
VAD (Voice Activity Detection)
CNG(Comfort Noise Generation

Enviromental

Electric requirements
Voltage: 9V ~ 24V
Power adapter: output DC 12V/450 mA

Operating requirement
Operation temperature: 0 to 40° C ( 32° to 104°F)
Storage temperature: -30° to 65° C (-22° to 149°F)
Humidity: 10 to 90% no dew

SIP, IAX2 の両方のプロトコルを登録できます。

ITSPのサービスを使うと、海外への通話料金が安くなるばかりか
日本の03や050サービスを海外で受信することもできるようになります。例えば東京の03の番号を設定できるサービスとしては、アジルフォーンやSIPPHONE(Gizmo) などがございます。