|
|
|
 |
Description of VoIP Select
|
|
 |
|
 VoIP Select is a flexible telecommunications calculator
package which allows you to perform technical calculations, including those involving
Voice over IP. The software lets you to build calculators to meet your own needs,
and includes pre-defined calculators for common applications.
VoIP Select allows you to explore the answers to questions like:
I have 1500 Erlangs of busy hour traffic. How many lines does
this need at 1% and 2% blocking, and what bandwidth is required through an IP-based
network, if I use G.729A, compared with G.723.1? or
I have 100000 minutes of traffic a day. How many lines should
I provide for blocking targets of 1%, 3% and 5%?
VoIP Select operates on Windows 95, Windows 98, Windows ME, Windows NT4,
Windows 2000 or Windows XP. |
|
|
VoIP Select is based on our free
online calculators, but provides extended support for Voice over IP calculations.
Specifically, it allows you to take the following factors into account for your
bandwidth calculations:
- Voice compression (CODEC)
- Select from: G.711 (PCM), G.723.1 (ACELP / MP-MLQ), G.726 (ADPCM), G.728
(LD-CELP) and G.729 (CS-CELP).
- Silence suppression
- For compression schemes (CODECs) that support silence suppression, you can
specify the percentage of activity on a voice call and see the corresponding bandwidth
savings
- Packet interval
- Specify the interval between IP datagrams (10ms - 90 ms).
- Transport protocol
- Select the type of compression used for IP/UDP/RTP headers (e.g. cRTP to 4
bytes).
- Control protocol
- Explore the effect of using header compression on the RTCP control packets.
- Data link protocol
- See the effect on bandwidth of transmitting VoIP using Ethernet, PPP, Frame
Relay, ATM and HDLC.
The latest version of VoIP Select performs data transfer calculations, allowing you to
estimate how much data will be transfered per day into a VoIP gateway if the number of
minutes switched by the gateway is known.
You can read the fully illustrated User
Guide now to find out more about these parameters. |
|
|
| This image shows a simple example of using VoIP Select to convert between
busy hour traffic to VoIP bandwidth: 
VoIP Select calculating from Erlangs to VoIP bandwidth.
VoIP Select installs nine calculators which can be used immediately (listed on the left
of the window under My Calculators). The calculator shown above is the Erlangs
to IP bandwidth calculator. VoIP Select breaks calculations into discreet
blocks, and each of these is represented by a panel into which you can enter the
calculation parameters. An Engset Calculator was recently added to the stock
calculators included with VoIP Select.
For more information, you can read the fully
illustration User Guide online. |
|
|
Designing your own calculators
|
|
|
|
| If the nine calculators installed with VoIP Select do not quite meet your
requirements, then it is very easy to design your own by dropping Calculator blocks
onto a design workspace and connecting them to describe the flow of calculations. 
The workspace for designing your own calculators with VoIP
Select
A collection of calculator building blocks have been provided including
Voice over IP, Erlang B, Extended Erlang B, Engset and general converters. To
design a new calculator, you just drop a block onto the workspace and, optionally, connect
it to another block. All this is achieved using mouse point-and-clicks. Each
calculator is automatically stored in a local database called My Calculators so
that it can be used later.
To find out more about designing calculators, and the calculator blocks
provided, you can read the fully illustrated
User Guide online. |
|
|
| VoIP Select is provided with a fully formatted and illustrated User Guide
which is distributed electronically in the form of Web pages. This User Guide explains how
to use the pre-defined calculators and how to design your own calculators. There is also a
Windows help system installed with the software, providing immediate context-sensitive
help when designing calculators. Additionally, all calculations record notes.
These show the input, parameters and output of each calculation. They also show any
assumptions made in the calculations, and detail the steps involved in each Voice over IP
calculation. The notes for the previous seven days can be viewed, copied to the
clipboard or saved to RTF format for importing into a word processor.
You can view read the fully illustrated
User Guide online now. |
|
|
|
VoIP Select
costs 135 US Dollars for a single user licence. You can pay
using any major credit card.
Transactions are with Westbay Engineers Ltd. and are handled on our secure
server. You can have the software running on your PC five minutes from now!) |
|
|
Please choose a licence type
|
|
|
|
| Please take a moment to consider the type of licence you require. Your honesty
in this matter helps us to continue developing our products. Software piracy is
illegal. |
|
|
|
|
|
|
| Alternatively, if you would prefer to pay by cheque or
money wire, please contact us. |
|
|
| If you have any questions about VoIP Select, please do not hesitate to send us an email. |
|
|
| |
VoIP |
Erlang B |
Extended Erlang B |
Daily call minutes |
Engset |
| Operating system |
Windows 95, 98, ME, NT4, 2000, XP, Vista and
Windows 7. |
| Operational limits |
0 - 5,000Mbps
0 - 100,000 lines |
0 - 100,000 lines
Blocking 0.001 - .0500
0 - 25,000 Erlangs BHT |
0 - 100,000 lines
Blocking 0.001 - .0500
0% - 95% recall factor
Blocking 0.001 - 0.500
0 - 25,000 Erlangs BHT |
0 - 30,000,000 minutes per day |
0 - 100,000 lines
Blocking 0.001 - .0500
0 - 25,000 Erlangs BHT
1 - 1,000,000 sources |
|
|
