Phone - Display and store UK telephone numbers
	      ==============================================
		       File: Phone - Update: 1.00
		 Author: J.G.Harston - Date: 23-Apr-1995


  The Phone library provides functions to display, store and retrive UK
geographical telephone numbers (01 and 02 ranges).


Requirements and Dependancies
=============================
  None.


Convert telephone number string to integer
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DEFFNPhone_FromStr(phone$)

  Converts the supplied telephone number into a four-byte integer
representation. Any non-digit characters are ignored.


Convert integer to telephone number string
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DEFFNPhone_ToStr(number%)

  Converts the four-byte integer representation of a UK telephone number
into a fixed-length 11-character telephone number string.


Convert integer to formatted telephone number string
====================================================
DEFFNPhone_ToStrF(number%)

  Converts the four-byte integer representation of a UK telephone number
into a correctly-formatted fixed-length 13-character telephone number
string.


Notes
=====
Behaviour is undefined for numbers outside the geographical 01 and 02
ranges. Only the 2,000,000,000 numbers in the range 01000000000 to
02999999999 are compressible into a four-byte integer.


Version History
===============
1.00 23-Apr-1995 First version written.