What does number unobtainable mean?
number unobtainable. Dial tone means that the attempt was successful, whilst number unobtainable means that it was unsuccessful. These are the additional tones, which you may hear.
What is number unobtainable tone?
A tone that indicates that the status of an end instrument or station is such that a normal ringing tone is not obtainable for that end instrument or terminal for any of various reasons, such as circuit disconnection, circuit outage, or circuit blocking.
When did the trim phone come out?
The Trimphone started life in 1964 as the Telephone No. 712, which was usually supplied as a 712L with an alphabetical as well as numerical dial. The Trimphone was the first in the GPO range to use a tone caller which warbled at around 2350 Hz modulated by ringing current.
Why does my phone beep before it rings?
Put in simple terms, this beep (or a vibration) indicates that the call is picked up by the dialler. When you call someone, certain procedures have to be followed. First call admission procedure ensures that you have the sufficient balance to proceed. Then, call initiation request is sent to base station.
What year did the Princess phone come out?
In 1959, the Princess telephone burst onto the scene in a delicious palette that included rose pink, aqua, and turquoise. A distinct departure from the blocky 500, the Princess was AT’s first phone that prioritized fashion over function. The Princess’s motto summed up its finest qualities: “It’s little. It’s lovely.
Who made the Trimphone?
The Trimphone traces its origins back to 1961 when the Post Office was looking for a luxury telephone to complement its standard offering of the 700 series model. It was designed by Martyn Rowlands who worked for STC and became available to the public in 1965 as model 712.
What is the beep I hear when I call someone?
Why do I hear beeping when I call someone?
Reasons for a busy signal The called number is talking with another caller on the phone. The number is calling out. Someone else has called the number or is calling the number at the same time. The other line was left off-hook.
What colors did the Princess phone come in?
Available in white, beige, pink, blue, and turquoise the Princess was designed to be a bedside phone for teenagers—specifically teenage girls. To facilitate bedside use, the phone took up only a third of the space of the standard desk phone, while containing a night light under the dial.
What is a prince phone?
The Princess telephone was introduced by the Bell System in 1959. It was a compact telephone designed for convenient use in the bedroom, and contained a light-up dial for use as a night-light. Contemporary advertising demonstrates that this telephone was marketed to women, hence its feminine model name.