Tld sxgw2001 is a good quality voip gateway and it is very cheaper calling rate. for example it cost just 0.018usd percent minutes that make a call to usa from anywhere.

It provides the high quality of VoIP communication by easy connection to the Internet. tld sxgw2001 can be connected to the regular phone and enable the user to place an internet phone call exactly the same as if you are placing a regular call.

LD SXGW2001 is a single port gateway, it is an edge-cutting product that can dramatically reduce your phone bills to an extreme low level,faxes can also be sent through it. It is especially tailored for SOHO companies,residents, business men and women who travel a lot.

TLD SXGW2001 features：

*clear voice, QoS voice quality guaranteed, supporting various telecom Freelink（TM）connecting technologies，having the application of high reliability and multiple scattered MGC.

*Flexible Billing at the terminal;

*easy installing and easy maintain,

*applicable to various types of internet environment ,genuine NAT capability.(NAT, Network Address Translation， the internet at present, has two major obstacles, the first of which is that there is limited IP addresses, and the second of which is the constant growing and increasing of thegateway subscribers, these two obstacles made it hard for many internet subscribers to get connected to the internet., but with the technology of NAT, it is made possible that many internet subscribers within one organization can have access to the internet by using one IP address, thus the legal IP addresses on the internet can be economized; on the other hand, internet security will be enhanced since that the real IP address is hidden under the cover of NAT.), having all the basic features of the PBX phone：line diverting when busy, hotline, caller ID etc.

*when there is a black out and no internet access available, the phone will automatically diverted to PSTN line.

*It will enable the user to answer calls from PSTN phone, and that one phone set will have two phone numbers; easy and flexible line diverting and VoIP/PSTN line switching function.

TLD SXGW2001 technical parameters：

1.call managing protocol: MGCP, SIP

2.Voice feature:
supporting voice coding: G.711，G723.1，G.729A，and G.722 with high clear voice.
supporting 802.1Q/1p VLAN and human voice priority, echo eliminating G.168，to maximum 96ms
supporting mute,nice noise，loss compensating, voice volume increasing controlling

Supporting DTMF signal sending and receiving;
supporting CID

Data feature:

supporting PPP/PPPoE，auto dialing, re-dialing, and supporting DNS, DHCP protocols, supporting static and dynamic IP address, supporting auto voice volume control;

　

Supporting PNAT, virtual server, MAC addresses filtering;

Management:
Management can be done by the Web explorer;

Remote maintain via Telnet;
upload via TFTP
Billing mode:

Supporting public phone billing after calling;
supporting prepaid management system with scratch card;

Net port：two 10/100M Ethernet ports：1WAN port, 1 LAN port;
Phone ports：two RJ-11 ports：1 port to Phone, 1 port for connecting from Line

1, smart routing P2P technology has been adopted ，it always knows to take the best way to go on the internet by fast calculating.

It is known to all that losses and delayed data transfer between different ISP is enormous, so that is why the voice quality of VOIP phone is so bad, but since we have adopted the technology of the P2P smart routing, the media flow will always take a best route that has the best voice quality.

2, the D-Com has adopted a better solution, which is from TI corporation.

3, We have selected a better landing relaying gateway of AudioCodes 。It is known to all that it is AudioCodes had made the first VOIP call in the world.

Anti-blocking:

Dcom device is blocking void. All VOIP blocking technology is void to our Dcom device.

Disconnecting is very rare when making calls over internet.

So with our D-Com device, that:

1, multinational corporations can set up their telecom network, which is free of charge for phone and faxing with their own network.

2, call to PSTN phones and send faxes。It can also connected to a phone exchange, then can have up to 8 lines with 8 difference billing accounts or one billing account, at the option of the users.

3, answering phone display at the one who is being called, so that when they call back, they will know which number to call you。All VOIP phone has no number now, so when you make a out-bound call, your number is hidden, and if the other side wants to call you back, they have no idea where to call you, but with our D-Com device, settings can be made to have your mobile phone number or your PSTN phone number to be as your caller ID to be displayed the one who is being called as if they think you are calling from your mobile phone or PSTN phone.

4, call diverting: so even if you are traveling abroad, you will never miss any of your calls, as it can be diverted to be answered to your any other phone that is being carried by you.

5, portable terminal: for the convince of the businessmen and businesswomen who travel a lot, we have a device which is Travelers’ Babe, very small and easy to carry.

6, Plug and play: Maybe you have a subcompany in china, in Europe or any other countries, so just plug the portable D-Com device, within one minute, you will be able to make calls. No complicated settings will be needed. But in case of dynamic IP, the plus and play still is easy if you?have a small router with you and in case that in your country IP is static, it is real plug and play.

Absolute Maximum Ratings:

Electrical?Characteristics:

Mechanical Characteristics: