As pointed above that the postal code systems can be unified by the Natural Area Coding System, all other address code systems can also be unified by the Natural Area Coding System. Now we are going to use the Natural Area Coding System to create all codes, numbers and addresses related to a location for telecommunication.

A NAC telecommunication address code can be constructed in the same way as the NAC global postal code and in most situations the NAC telecommunication code is exactly the same as its NAC global postal code if there is only one telecommunication unit in the address or the telecommunication unit has been integrated by a computer which can automatically connect different signals to their corresponding equipment such as a telephone, fax, television set or the computer file receiver.

If in one house or one office there are more than one separated telecommunication units, people can assign a unique locally defined third string to every unit to generate its telecommunication address code.

Generally, a NAC telecommunication code is an eight-character NAC plus a locally defined third string. But for a cellular phone or other tele-communication services valid in a large range, the address code may comprises only one unique user defined string, or a two-, four- or six-character NAC plus a unique user defined third string within the corresponding area.

The rules for defining a third character string for telecommunication address code are the same as those for defining the third string in a NAC global postal code.

A cellular phone address code comprising only a user defined string is a globally valid address code which can be recognized and used in the whole world. A cellular phone address code comprising a NAC plus a user defined string will be valid within the area defined by the NAC. A shorter NAC plus a user defined third string will be valid in a larger area. Large international companies may use globally valid cellular phone codes, while small local companies may take cellular phone codes valid within small areas.

The new telecommunication address code system can be used efficiently on a new telephone set on which it has keys of all digits and English letters together with several function keys: a space key, a hyphen - key, an Enter key and some other function keys.

If you want to call a person, you need input the three character strings of the NAC phone code separated by space keys and then press Enter.

If there is no third string in a NAC telephone code, you simply input the two strings separated by a space key and then press Enter.

The NAC telephone set has a display window to show the codes and an erasing key for correcting wrong characters during the input. It has another function key for the user to display the distance between the caller and the receiver and to show the price of the call before the user presses Enter. Therefore, the caller can make a decision whether to make the call or not before pressing Enter.

The keys and their bit codes of a NAC telephone set should be the same as those of a computer keyboard, which may help produce an integrated computer system for phones, faxes, and internet services in the near future.

Using a current touch tone telephone set to call a NAC telephone code, a person has to use two keys * and # as the prefix of each NAC character string and two digits to represent a NAC integer corresponding to a NAC character and press * and * to enter the code. NAC integer 0-9 should be replaced by 00-09 respectively. The English capital vowels are defined as: A = 30, E = 31, I = 32, O = 33, U = 34, Y = 35, and the symbol - = 36. For example, if you want to call me at NAC: 8CHD Q87M SHEN, you can press these keys: *, #, 0, 8, 1, 1, 1, 5, 1, 2, *, #, 2, 2, 0, 8, 0, 7, 1, 9, *, #, 2, 4, 1, 5, 3, 1, 2, 0, *, and *.

If a telephone code has only a user defined string, then you just press *, #, the corresponding digits and then *, * on a current touch phone.

Using a NAC telephone set to call an old telephone number, you have to press O, then input the number and press Enter.

The NAC telecommunication address codes and current telephone numbers can work compatibly and the old system is allowed to get out of its service gradually.

Using the NAC address codes, telephone cables, TV cables and Internet cables can be easily integrated into one telecommunication network, and their capacity and efficiency can be maximized.

Therefore, a NAC plus a user-defined string can be used for both local and international postal services, emergency services, delivery services, telephone and fax, cable TV and internet services. The public can be released from managing continually increased addresses and codes.

The advantages of the NAC universal telecommunication address code system are:

1. One code is for all address-related services, which can greatly ease the public in using all address-related services;
2. Due to the unified format and meaningful characters of the code, NAC telecommunication code will be very easily accepted and translated;
3. The code can help all telecommunication networks integrated into one unified telecommunication network;
4. Since the code represents universal coordinates, telecommunication software can easily connect the communication line based on the distance;
5. The code can be determined by the user, which can help to eliminate the address management services and reduce all time and inconvenience in waiting and assigning address code.