iphone tcp ip
Internet Phone – The Smart Phone
An IP Phone is a new technology of this century. An IP phone means a phone that sends traffic over a TCP/IP network. An IP phone uses Voice over IP technologies allowing telephone calls to be made over an IP network such as the internet instead of the ordinary PSTN system. Calls can traverse the Internet, or a private IP Network such as that of a company. The phones use control protocols such as Session Initiation Protocol, Skinny Client Control Protocol or one of various proprietary protocols such as that used by Skype. IP phones can be simple software-based Softphones or purpose-built hardware devices that appear much like an ordinary telephone or a cordless phone. There also exist the possibility to reuse ordinary PSTN phones as IP phones, with analog telephony adapters (ATA).
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IP phones are typically used for VoIP applications. An IP phone have many features an analog phone doesn’t support, such as e-mail-like IDs for contacts that may be easier to remember than names or phone numbers.
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Common features of IP phones
* Caller ID
* Dialing using name/ID: This is different from dialing from your mobile call register as the user does not need to save a number to a sip phone.
* Locally stored and network-based directories
* Conference and multiparty call
* Call park
* Call transfer and call hold
* Preserving user name/ number when choosing a different service provider (not widely supported).
* Applications like weather report, Attendance in school and offices, Live news etc.
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