The gateway reverses the operation for packets coming in from the network and going out the phone. A number of configurations can be built from this basic operation. To offer international long distance service using gateways, for example, an organization or service provider can host one gateway in each country. In early versions of the technology, speech was distorted and disrupted. Voice quality has improved greatly, and has yielded products where speech is easy to understand.
Latency affects the pace of the conversation.
Most of today's Internet telephony products exceed the delay that we can handle without having a noticeable effect. Although useable, Internet telephony today requires some getting used to. Developers are just beginning to squeeze latency out of the first generation of products. Deployment over private networks. By deploying gateways on private circuits, organizations and service providers can control the bandwidth utilization and, hence, latency.