| 1) | What is VoIP? |
VoIP stands for Voice over Internet Protocol. VoIP technology enables the real-time transmission of voice signals as packetized data over IP networks that employ the Transmission Control Protocol (TCP), Real-Time Transport Protocol (RTP), User Datagram Protocol (UDP), and Internet Protocol (IP) suite. |
|
| 2) | What are the benefits of using
VoIP? |
VoIP lets you make free long distance
voice and fax calls over existing IP data networks. Today businesses that
implement their own VoIP solution can dramatically cut long distance costs
between two or more locations. |
|
| 3) | What are the functions of VoIP
Gateway? |
VoIP Gateway functions as a bridge between
your office's LAN, WAN, and the Internet connection. Generally, different
kinds of transport media have different protocols. VoIP Gateway can let
your voice encodes transmit over IP and the remote VoIP Gateway decodes
back the voice to the phone, so that you can hear like normal IDD or phone
conversation. |
|
| 4) | What kind of equipments
can be connected to VoIP Gateway? |
Any kind of traditional analog phone sets can be connected to it. Also you can connect VoIP Gateway to your office's PABX's external line port as its input. In this case, the incoming phone calls are from the Internet, they will be routed to your office's stations. |
|
| 5) | What Internet access
speed should I have for using VoIP Gateway? |
Generally, when we talk about the speed of a network connection, we mean its bandwidth. Our VoIP Gateway products provide low bandwidth consumption capabilities. It will consume minimum average 10Kbps of bandwidth each channel. |
|
| 6) | How many audio codecs do VoIP
Gateway products support? |
Now we provide G.711, G.723.1 and G.729.a,
G.729.b audio codecs in our VoIP Gateway Product line. |
|
| 7) | What kind of protocols do your
Gateway products support? |
Our VoIP Gateway products now support
ITU-T's H.323 and SIP protocol. |
|
| 8) |
Can I connect a
fax machine to VoIP Gateway and fax through the Internet? |
Yes. You must connect your
fax machine to an FXS Port (RJ11) or in extension. |
|
9) |
Can I connect the
VoIP Gateway to an ADSL modem? |
Yes, VoIP Gateway itself
is ADSL (PPPoE) dialer, it can provide NAT (Network Address Translation)
for the broadband network sharing if is a model with NAT support, our
VoIP Gateway also support Fixed IP address. |
|
| 10) | I am in Hong Kong.
When I make a call to my company in Tokyo through VoIP Gateway, the voice
quality is good, but while I call to China, the voice quality is sometimes
good, sometimes bad. Why? |
There are some factors may
make the voice intermissive. One that happens most of the time is the
bandwidth of your network connections. Although you could connect to anywhere
all over the world if there is an Internet connection, but the quality
of voice mostly depends on the bandwidth the local Gateway could utilize. |
|
| 11) | WhatSs the advantage
of the QoS? |
The QoS is a mechanism to let certain packets with
higher priority passing through networks before the other packets with
lower priority. In general VoIP applications, we often set voice packets
with higher priority to ensure satisfying quality. |