ayuhyde wrote on Oct 24
th, 2007 at 2:24pm:
I already used my phone card to made an external call, the number display in my friend's moblie is 01159100***. But when She called this number, it display "user busy"......but when she call the 0870 number it work.
Right, that's a key piece of information !!!
0115 is Nottingham and the thread for Nottingham University is
here.
The Nottingham system uses 0870 numbers in the same range and also gives the same 0115 number when calls are made from the phones. It is also interesting that you have four digit extensions but only 144 phones. 3-digits would be adequate. So perhaps this helps explain the need for 4-digit extensions.
What if you want to dial a Loughborough (01509) number? Do you have to dial the 01509 code, or can you dial the 6-digit number, prefixed with whatever you need to get an outside line?
Going by the information on the Nottingham thread, the prefix is 0115 005 followed by the last four digits of the 0870 or extension. (Are they different? - if so, let us know which it is).
I mentioned "national dialling only" numbers above. This is one as the "local" part of the number begins with 0, and therefore the code must always be dialled. Some networks don't allow these numbers to be called. If you have an Orange mobile or NTL (Virgin Media) landline, then you might be able to dial it directly. Just because you can't dial it from one particular phone doesn't mean that it's not the right number.
Do let us know what works and whether the last four digits of the geographical number are the extension or the 0870 or if these are both the same anyway.