Internet telephony versus fixed telephony comparison

Internet telephony has a lot to gain from the differences between traditional voice solutions and those based on Internet access technology and Internet voice transmission. Most of the disadvantages of traditional solutions turn into advantages in current telephone solutions available over the Internet.
This is presented in the table below showing the pros and cons for fixed and Internet telephony services.
Traditional telephone lines Internet telephony Comparison of fixed telephony and VoIP telephony ZA: PRZECIW: – high quality of telephone calls – temporary reduction of the quality of telephone calls, comparable to mobile telephony – high resistance to external interference – reduced resistance to external interference, dependence on transmission media (Internet) PRIORITY: ZA: – no possibility of transferring a telephone line* to another numbering zone – user’s independence* from the place of service provision (numbering zone) – often difficult to transfer a line with a number to another location in the same numbering zone – mobility/transferability of numbering together with a user using it – telephone number assigned to a telephone line – independence of numbering from a telephone line – expensive subscription for maintaining a telephone line (over a dozen, tens of USD) – low or zero cost of subscription for user’s maintenance and numbering (several USD) – relatively high costs of telephone calls – low rates for telephone calls – often forward contracts – lack of forward contracts (e.g. pre-paid option) – difficult and time-consuming procedure related to the termination of a telephone line – easy to cancel the service – – low prices for telephone calls (e.g. for a pre-paid option) number of telephone lines and numbers dependent on cable network resources in a given location – number of users and numbers without limitations (no dependence on cable/network resources) – difficult or impossible management of added services – management of added services on-line (via administration panel) – management of telephone calls costs often after the fact, on the basis of received invoice to be paid – management of costs of on-line telephone calls on the basis of system statistics – difficult access to billing of telephone calls made, often in paper form, and payment for making billing data – access to billing of telephone calls made in real time for each user, on-line billing, without additional fees – lack of information on incoming calls, billing of incoming calls, statistics for incoming calls – information on incoming calls available on-line, through the administration panel – easy access of unauthorized persons to telephone lines, the possibility of eavesdropping or abuses related to connecting to telephone lines – lack of access to telephone lines, the possibility of eavesdropping and unauthorized connection significantly hindered
* user = telephone connection
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