Q1: What is Internet telephone?
Q2: How is the voice quality of Internet telephony Gateway?
Q3: What kind of telephony interfaces does ITG support?
Q4: Does ITG support Fax?
Q5: What is bandwidth requirement of ITG?
Q6: Does ITG need another PC or Server to handle the call
Q7: How can I call my customer who doesn’t have ITG?

   ● Broadband Communication

Q2: How is the voice quality of Internet telephony Gateway?
It is no more a puff for Internet telephone to provide toll-quality voice service.To achieve this goal, most Internet telephony servers use the industry standard and high-quality voice coders including G723.1, G729A and advanced voice compression/decompression technology to deliver high-quality Voice over IP (VoIP) services. ITG Voice quality is determined primarily by three major factors, delay, packet loss, and jitter. That is, the lower the delay, the less the packet loss and the smaller the jitter, and the better the voice quality. The low delay, packet loss and jitter simply requires sufficient Internet bandwidth between the originating and destination gateways.

Q3: What kind of telephony interfaces does ITG support?
ITG supports:
1.Loop Start Foreign Exchange Office (FXO)- for connecting ITG to either PBX’s extension lines or central office line.
2. Loop Start Foreign Exchange Station (FXS)- for connecting ITG to PBX’s trunk lines, key telephony system, telephone sets or fax machines.
3.E&M (Type V, 4 Wire) - for connecting ITG to PBX, Supporting immediate, wink and delay start.

Q4: Does ITG support Fax?
Yes, ITG supports T.38 and T.30 Fax. Please make sure the fax codec used (T.38 to T.30) are the same at the both end of ITGs.

Q5: What is bandwidth requirement of ITG?
The bandwidth requirement is related to the coder used and overhead associated with the IP packets. Linkpro's ITG support 3 kind of voice codec, G723.1 takes about 12 Kbps per channel, G729A/AB takes around 15 Kbps per channel, G711 takes about 100 Kbps per channel. T.38 fax takes around 28 Kbps per channel.