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Four Port Voice ATA function description：
NXD-4X voice gateway is a multi-function voice/fax/data access gateway specifically designed for operators, enterprises and household users. NXD-4X supports standard SIP protocol, and supports multiple network access means (ADSL, Cable Modem, etc.). It is able to provide operators and virtual operators with highly cost-effective VoIP solutions such as IP telephone supermarket and enterprise branches.

NXD-4X voice gateway offers one RJ45 interfaces and four RJ11 interfaces, and supports various private network transparency modes (STUN, OUTBAND PROXY, UPNP). It can provide dual-server registration backup, supports SNMP protocol and VPN. NXD-4X has compact size and support cascading and flexible networking, and is able to provide operators and large enterprises, telephone bars and household users with highly cost-effective IP voice solution. While providing rich IP telephone features, the gateway also has rich built-in IP features and strong adaptability to IP networks.

Four Port Voice ATA Key Features：
① 4 analog loops starts the FXS interface (RJ-11), used to connect 4 telephones；

② Configurable (*,#) feature codes；Unattended/ attended call transfer；

③ call waiting and per call-waiting blocking；call forward (Always, busy, no answer)；

④ call return；caller number/name display；call hold；FAX (T.38)；

⑤ caller ID /block outgoing caller-ID/Reject anonymous call；DND (Do not disturb)；

⑥ voip speed dial；VoIP digital map；per area ring tone support；E.164 dial plan；

⑦ MWI(Message wait Indication) ；configurable/Adaptive jitter buffer size；

⑧ configurable Hook Flash time；Static/Dynamic WAN-IP-Addressing ；

⑨ Supporting DHCP Server, used for the dynamic address allocation plan of LAN devices；

⑩ Supporting remote configuration of Web mode and remote software downloading/upgrading；

Four Port Voice ATA Electric Spec:
① FXS port ---- 4 FXS Port for Tel；● AC/DC power adapter, 12V DC；DC input: 12V DC/1A；

② Ethernet Port --- 1 X 10/100MHz Ethernet Port; ● SIZE：150mm (L) ? 98mm (W) ? 30mm (H)