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VoIp Usability |
Summery | next |
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UsabilityUsability consists of several different subtopics but the only mesurand
is the consumer satisfaction. The user want to have a high available, cheap
and secure system that allows to communicate with a high speech quality. Easy
useage and installation and integration into existing networks are othe
impotand points of the VoIp usability. Network configurations LAN: The use of VoIp in a closed LAN is quite easy und has the highest quality. There is no need of additional components and the installation of existing software tools is quite easy. Over the internet: Using VoIp over the internet is easy
when both PC's are directly connetced to the net. There are some security
problems because there is no easy way to implement a firewall that can
handle H.323. Using VoIp over the internet and one of the PC's is
member of a LAN and connected to the web via a gateway is a little bit mor
complex. The PC that is member of the LAN can connect to the other but
without a Gateway that supports H.323 it is not possible for the other PC to
set up an connection. Combinig Public Switched Telefone Networks and VoIp: An interesting way is combining the public switched telefone network via a gateway with a LAN. A gateway can be used to provide a highly transparent access from and to the PSTN Speech quality The used codecs in the gateway and the terminal pc, packet loss in the LAN and the quality of the loudspeakers and microphones will influence the speech quality.
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