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A party line (multiparty line, shared service line, party wire) is a local loop telephone circuit that is shared by multiple telephone service subscribers. [ 1 ] [ 2 ] [ 3 ] Party line systems were widely used to provide telephone service, starting with the first commercial switchboards in 1878. [ 4 ]
Many VoIP service providers offer home and business systems. Both solutions allow users to make and receive calls from any internet-connected device, including cell phones, computers, or VoIP phones.
For other smartphone operating systems (e.g., Sailfish OS) there are Zello-compatible apps provided by third parties. [ 20 ] Zello Work is the paid service of Zello app that allows corporates and users looking for real-time communication over groups and channels.
Party line or Party Line may refer to: Party line (politics) , the agenda of a political party Party line (telephony) , a system where multiple telephone customers are connected to the same phone line
The basic Central Control Unit (CCU) starts off as an 8 extension unit, with either analog POTS lines or ISDN line modules available. There is a serial connection that can be used for call logging and configuration. It can either use standard telephones or proprietary feature phones. A special Door Phone may be added on extension 23 and the ...
The first subscriber's phone (called the 'audio customer') would be connected as normal. The second subscriber (called the 'carrier customer') would have his phone calls modulated on to an RF carrier or Carrier wave on the same physical phone line at around 40 kHz – high enough not to be noticeable to the audio customer.