Problems
Caller identification between countries is often not transmitted, instead with the display indicating "UNAVAILABLE" or "INTERNATIONAL", but it is becoming more widely available including the country calling code. This is usually the case with mobile phones and international roaming. However, the overseas number may be compressed into a "domestic" format and thus possibly not be recognizable: e.g. a US number 1 646 555 1212 may be displayed in the UK as 0646 555 1212, instead of 001 646 555 1212 (or as +1 646 555 1212, where the "+" represents the access code to dial international numbers).
Some callers have situations in which revealing the number being called from would invade their privacy or cause other severe problems. Calls from women's shelters often have outgoing caller ID blocked.
Caller ID may not give the caller's information if the caller is using a discount or travel calling program or a voice over IP phone, because those systems use intermediate telephone numbers in the country being called.
Some long distance telephone cards, especially those using VOIP to carry calls, mask caller ID information. These calls are commonly displayed as "Out of Area".
Read more about this topic: Caller ID
Famous quotes containing the word problems:
“I had many problems in my conduct of the office being contrasted with President Kennedy’s conduct in the office, with my manner of dealing with things and his manner, with my accent and his accent, with my background and his background. He was a great public hero, and anything I did that someone didn’t approve of, they would always feel that President Kennedy wouldn’t have done that.”
—Lyndon Baines Johnson (1908–1973)
“The proper method of philosophy consists in clearly conceiving the insoluble problems in all their insolubility and then in simply contemplating them, fixedly and tirelessly, year after year, without any hope, patiently waiting.”
—Simone Weil (1909–1943)
“If family communication is good, parents can pick up the signs of stress in children and talk about it before it results in some crisis. If family communication is bad, not only will parents be insensitive to potential crises, but the poor communication will contribute to problems in the family.”
—Donald C. Medeiros (20th century)