International direct dialing means that you dial the entire number yourself, rather than calling an operator and asking her or him to dial it for you.
The U.S. shares country code +1 with Canada, Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, CNMI (Saipan and Tinian), Bermuda, Bahamas, Anguilla, Antigua & Barbuda, Jamaica, Cayman Islands, Dominica, Dominican Republic, Trinidad & Tobago, Grenada, Barbados, St. Kitts & Nevis, St. Lucia, St. Vincent & the Grenadines, Montserrat, British Virgin Islands, Turks & Caicos Islands, and the Dutch half of Sint Maarten. Those locations are dialed "one-plus" just like domestic calls.
For other international calls, dial:
011 = international prefix from the U.S. and Canada
country code (e.g., +44 for the UK)
city code (in most cases, drop the leading '0')
local number
# (the # key on your touch-tone phone tells the phone switch that you've finished dialing, so it doesn't wait to see if there are any more digits coming)
IDD means international direct dial.
Dial Direct offers many different services. Dial Direct allows a person to make a long distance call by simply hitting, 1, before the number, or, 001, before an international long distance call.
std means standard call and idd means international direct dial
It would be an international call, so yes you would have to pay in order to dial a number in the United Kingdom from the US.
Dial the International Access Code (011 from the US; something else from most other countries). Dial the UK Country Code (44). Dial the UK Area Code (WITHOUT the initial zero) Dial the UK Local Number.
Dial 011, the international access code. Dial 353, the Irish country code. Drop the 0 from the beginning of the city code. Dial the remaining digits.
If the US mobile phone is in international roaming mode, you may be able to dial its normal US number. If the phone has swapped in a UK SIM card, you will need to dial the UK number.
The telephone country code for North America (US, Canada, and several island nations and territories in or near the Caribbean) is +1. The plus sign means "insert your international access prefix here." The international access prefix from Cameroon is 00, so to call the US, dial 00 + 1 + area code + number. (To call from the US to Cameroon, dial 011 + 237 + number.)
Direct dialing just means that you dial the number yourself, without asking an operator to dial it for you.
There should be no difference to using it in Britain and the US. Make sure that all of your phone numbers are entered in the international format (i.e. +1xxxxxxxxx for US numbers and +44xxxxxxxxxx for British) The US phones that try to reach you will have to dial 01144xxxxxxxxx to reach you. You should be able to dial direct 1xxxxxxxxxx but just to be safe use +1xxxxxxxxxx.
Dial 0061 (the international access code for Australia) - then the number in full.
Dial 0061 (the international access code for Australia) - then the number in full.