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1/8/2012 4:06 PM
 

I have a site where the bandwidth cost are very high and the maximum we get is 1 MB.

I sould run a 32 channel gateway here.

Can you please help in this problem?

 

--
Albert

 
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3/11/2012 11:14 PM
 
Hello

Please have a look at the following description (FAQ section from the Mizu softswitch admin guide):


1.104.  What are the typical bandwidth requirements for VoIP?

Voice payload (G.729): 20 bytes

RTP header: 12 bytes

UDP header: 8 bytes

IP header: 20 bytes

Total bandwidth = 480 bits / 20 ms

Total bandwidth = 24,000 bps

 

If 80% of the calls are using g729 and the rest g711:

 

1 channel bandwidth: 40 kbits   = 13 GB / month

10 channel bandwidth: 400 kbits   = 130 GB / month

100 channel: 4 mbits = 1300 GB / month (1.3 TB)

1000 channel: 40 mbits = 13000 GB / month (13 TB)

10000 channel: 400 mbits = 130000 GB / month (130 TB)

If both the traffic sender and the termination devices are located on remote peers, then you have to multiply these values with 2X (especially if you are billed for both “in” and “out” traffic)

 

Nothe:

1.      These callculations are valid only if you have all the time X amount of traffic. This is usually not the case and you will alos have offpeak times.

2.      These calculations are vaild only if all your traffic needs RTP routing. Under normal circumstances you should be able to offload a lot of RTP routing from your server and enable the endpoints to communicate directly between them. This can be handled automatically by the Mizu VoIP server.

 

The bandwidth needed for g729 codec is around 32 kbits (this is the total bandwidth including RTP, UDP and Ethernet headers)

We assumed that not all calls will be handled by g729. Let's say around 20% is with g711. So let's calculate with 40 kbits in average.

This means 4 mbits/sec for 100 channels which is 0.5 MB/sec.

We have 60*60*24 seconds in a day and approximately 60*60*24*30 seconds in a months which is 2592000 seconds.

So we have 0.5 * 2592000 MB/month which is 1296000  MB which is 1296 GB/month for if you have 100 simultaneous calls in average.

 
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10/5/2012 3:18 AM
 
It looks these you got nice offers here.

Always give it a smile..
 
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