How much traffic in CCS can I offer to an IP based network path whose bandwidth is 512 kbps. I am using the G.729A codec. I am using cRTP header compression to reduce the packet header to 2 octets and one packet is being transmitted in each direction every 30 milliseconds. I accept that 1% of calls will be blocked.
To find out the answer to this question, follow these steps:
|•||Select G.729A using the Coding algorithm drop down box.|
|•||Select 30ms using the Packet duration drop down box.|
|•||Select cRTP header compression (2 bytes) using the RTP header compression drop down box.|
|•||Choose kbps as the bandwidth unit by clicking on the kbps radio button on the right side of the window.|
|•||Choose CCS as the traffic unit by clicking on the C.C.S. radio button on the right side of the window.|
|•||Click the Unknown radio button in the B.H.T. area to indicate that you wish to calculate the busy hour traffic.|
|•||Enter 512 in the edit box in the Bandwidth (kbps) area.|
|•||Enter 0.010 in the edit box in the Blocking area.|
|•||Press the Calculate button.|
After a short time, 1657.296 will be displayed in the grey edit box. This is the result of the calculation, and shows that 1657.296 CCS of voice traffic can be offered to a system using the selected VoIP characteristics and whose IP bandwidth is 512 kbps. This result does not take any layer two overhead into account.