äänipuhelupalveluita
Äänipuhelupalvelut, or voice call services, refer to the telecommunications infrastructure and technologies that enable users to communicate with each other through voice transmission over a network. Historically, this was primarily achieved through circuit-switched telephone networks, such as the Public Switched Telephone Network (PSTN). These traditional systems established a dedicated, continuous connection for the duration of a call.
In modern telecommunications, voice calls are increasingly delivered using packet-switched networks, a technology known as Voice
Äänipuhelupalvelut encompass a wide range of applications, from basic person-to-person calls on mobile phones and landlines