Ping or Ping test refers to a reaction time of your device to respond to the request from another device. or for those who extensively use social networks by uploading a lot of media (photos, videos, etc.). On the other hand, upload speed might be very important for users who upload a lot of data to services such as YouTube, Google Drive, Dropbox, etc. Most activities on the internet don’t require fast upload speeds. Upload speed is usually slower than download speed, as upload speed is usually less important for the common user. Upload speed means how quickly internet users can send data from their devices (PC, mobile, tablet, etc.) to the internet network.
Download speed is usually higher than upload speed, as most common internet activities are based on downloading (loading pages, downloading files, watching videos, etc.). TCP-based IPsec tunnels spend time/bandwidth retransmitting packets that won't be useful.Download speed means how fast internet users can retrieve data from a server or internet site to their devices (PC, mobile, tablet, etc.) online. Also, changing your VPN client to UDP instead of TCP would help. So far, Cisco has not adopted this codec into their end points.įor now, your best bet will be to get iLBC working if you want to use the Cisco client. Skype submitted this to the IETF apparently. Skype on the other hand uses SILK for audio between current client versions (calls with older clients would use older CODECs instead).This is even newer than iLBC to Cisco and, while promising, is only possible with CSF or 8900/9900 series phones at present. This will degrade the worst/fastest because packets are inter-dependent.Īlso worth noting, there is another option called iSAC however, CIPC does not support this. This codec has the lowest bandwidth requirement which may be useful in a cellular data connection however, it uses a predictive algorithm called CS-ACELP that makes it very susceptible to jitter and loss. While they do consume higher bandwidth, the lack of CS-ACELP makes them degrade better than G.729 does. These are the second-best route in my experience. You'll need to adjust configuration in CUCM and run a relatively new IOS version or TNP firmware version to get a call to negotiate this CODEC. This is your best bet but is relatively new to Cisco. iLBC is 15.2kbps plus overhead by default.All of these transmit a packet every 20ms by default. IP Communicator 7.0 is capable of using G.722, G.711, G.729, or iLBC.IP Communicator and Skype use two very different sets of CODECs. This is a simple matter of CODEC selection.
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