Error id 678 - D-Link DWM-156 3.75G HSUPA USB Adaptor

This error is due to modem not responding problem, or signal strength is low.To cure this error, Follow the below steps :-
Goto start program - control panel - click on phone and modems options - A Window named as Location information opens

Select the country/region are you in now - then specify the area code (or city code) are you in now - then select tone dialing - click on ok button Phone and modem options window will open with the details you have entered in previous window...

Thanks & Regards
Anas K A

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Error 678 and Error 679 Connection Errors
Error 678 The remote computer did not respond (No dial tone)
Error 679 The Specified destination is not reachable
Both errors are very closely related as they both suffer from the same causes

Causes
ISP (internet service provider) problem.
You have a phone line problem.
Router / Modem is disabled, this can be due to.
The LAN or Phone cable is disconnected.
Your firewall is blocking the connection.
The Winsock file needs to be repaired.
A phone line does not have a line filter installed.
The modem drivers are corrupt.
Spyware.
Your modem is faulty.
Your username, password is wrong.
Incorrect ISP or Router / Modem Configuration

Hope it helps.

Book Shop Management System
Introduction
BookMart is a book shop selling all varieties of books. It needs a console based application to manage its customer and business data.
Registration
Customers need to register before making any purchase. The registration system has the facility for the users to create their own user name and password. They can use the same for further communication with the system.

The user id and password should be stored in a file named “login.txt”.

The application should display the main menu as shown below

1. Login
2. New User Registration
0. Exit

Option 1: Login

If the user enters the option as 1, the user should be prompted to enter user id and password.

If the user has entered a valid user id and password, the message “Login Successful” should be displayed and the below menu options should be displayed.

1. View Books
2. Purchase
3. Back to Main Menu

If the user id and password does not match, then the message “Login Failed” should be displayed and the main menu should be displayed again.

Option 2: New User Registration

If the user enters the option as 2, the user should be prompted to enter a new user id and password. If that user id is not present in the “login.txt” file, the new details should be written to the file and the message “User Successfully Registered” should be printed else the message “Duplicate User ID” should be printed.

Option 0: Exit

If the user enters 0, the application should exit.
View Books
The book details should be maintained in a file named “book_master.txt”. The data should be stored as shown below.

Book ID ISBN Name Price Publisher

Sample Data

678 81-3434-343-3 Oliver Twist 500 PlaymorePublishers

When the user enters the option as 1, all the book details should be displayed on the screen with proper headings. For example, the output should be shown as below.

Book ID ISBN Name Price Publisher
678 81-3434-343-3 Oliver Twist 500 PlaymorePublishers
890 81-2456-343-4 The Tempest 800 Williams'sPublishers
Purchase
Users can purchase after valid registration with the system by providing the book id.

The number of available books is maintained in a file called “stock.txt”. This file will have the book id and quantity on stock. As purchases are made, the total count should be reduced in stock.txt. Stock.txt will have data as shown below.

678 50
890 70

Purchase details should be written to another file named “purchase.txt”. This file will have the details as follows.

Book ID Name User ID User Name Price

For example,

678 Oliver Twist 11 Shubha 500
Back to Main Menu
If the user enters 3, then the main menu should be displayed.

i want to use my se w395 as a modem. I have downlaoded teg software from tthe sony ericsso site ean installed it on my computer. As a test i wanted to call my house phone, but then i get "Error 678 remote computer did not answer" Please help me

error code is 678 means Ur com port not correct configure so before u connect anything u must to configure correct.

http://support.microsoft.com/kb/892889

Error 678 is with if you had given wrong username & Password., pl verify correct UN & pswd it must be very case sensitive is there any special character included in the UN & pswd., verify then try again., it will works....

Make sure u have the usb drivers installed for this new modem on the computer..