A multi platform, customizable and uniform administrative interface based DHCP server for RRCATNet was needed. RRCATNet is a network of 2200 nodes with more than 42 networks interconnected together. It was foreseen that in near future network of every building will need to be allocated dynamic IP addresses. DHCP servers on various platforms have different ways of configuration and that too without any user-friendly interface. RRCATNet is spread over multiple buildings with variety of server flavors. To use various servers as DHCP servers, a common and user-friendly interface for DHCP server configuration was needed. Thus an effort was made to develop such a system.

E-mail accounts given to employees, visitors, and other temporary e-mail accounts, are dynamic in nature. Information associated with the users can not be reflected on any conventional printed directory/ information book, and the same complications are involved when deletion of email record needed. To manage the whole process related to e-mail accounts creation, deletion, recording of necessary user information and its analysis over the network, a web based interface has been developed and implemented. Tools used to implement this package are HTML, shell script and PHP for front end and POSTGRES (RDBMS) for backend.

The aim of the project is to provide a web based user interface to the users of four sub- systems of precision manufacturing system so that they can efficiently collaborate with each other and thus increase the productivity and decrease the cost of precision manufacturing process. The need for such an application was felt to counter the disadvantages of floppy based collaboration approach earlier used by the sub-system users. Salient features of this application are-

• User convenience, because it is web browser based.
• Reduced data transfer time. Collaborating users only need to wait for the other user to upload the file from his PC.
• User authentication using Apache web server htaccess feature
• Centralized storage of data files, with searching options.

The aim of this application is to provide a web interface to network administrator to efficiently handle multiple links to Internet. This application provides interface to automatically/ manually divert both the incoming and outgoing web, name and mail server traffic to and from the outside world to the link of administrator's choice. The main features of the application are–

• Allows Manual/ Automatic diversion of traffic flow.
• Relieves the administrator of knowing the details of the configuration files.
• The major internet services like HTTP, PROXY, DNS and MAIL traffic can be diverted by using a simple web browser.

A system has been developed which allows to build a customizable low cost search system, useful for maintaining an attribute based database on the web and easy to implement web based attribute related search interface. It is very useful for implementing search on large databases like that of library and telephone directory. All ready made software systems like the Netscape directory server cost about lakhs of rupees. This system has been tested and is working on 1.5 lakh records of Indore Telephone Directory of BSNL.

A prototype for a 24 hours online Help Desk System was developed, which can be used by administrators on intranet and internet for automating their manual help desk systems. The following are some of the features of this prototype:

• Can be easily installed on Linux platform with a simple modem having voice commands support.
• Developed using shell scripts with switch and case statements, thus can be easily configured for other uses.
• The status of network/ internet connectivity can easily be obtained over a telephone.
• Any instructions which are of use to all the users can be recorded in voice form and be made available 24 hours for reference.

• A level-wise set of instructions can be intelligibly designed to customize help desk system. The prototype has been tested and found to be working satisfactorily. Presently we are working on developing the system in Perl and Java which will have some advanced features and user friendly graphical interfaces.

PC based experimental setups are very common in any research organization. This involves monitoring, controlling and data logging for the experiment using a PC. PC based monitoring of the results for days together have certain risk factors when carried out in the vicinity of the setup. All these demand for a remotely controlled setup. With RRCATNet extended to every building inside the campus, the objective was following:

• To remotely monitor/ control any experiment on a PC connected to RRCATNet.
• To be able to log the experimental results on a PC connected to RRCATNet.

A working prototype for Voice call notification utility over phone line busy on dialup was developed. This utility allows a person to be notified of a voice call with the caller’s phone number displayed on the users desktop while the person is using the phone line for connecting to internet. The need for such an application was felt since internet facility at RRCAT has been extended to remote buildings using dialup connectivity. Use of internet for long durations causes phone lines to be busy, which in turn leads to inaccessibility of the phone for voice communication. The prototype has been tested and found to be working satisfactorily. Presently we are working on further enhancing the utility to support both way voice communication channel with RSVP and RTP protocol features.

Following are some of the features of this prototype:

• Uses inexpensive voice modems for telecommunications and IP network integration needs.
• Based on the Server (Linux based) /client (Windows based) model.
• Uses the existing telephone exchange "Call forward when busy" feature.
• Client side application resides on Systray and presents a flashing popup window with the caller’s phone number on arrival of the call.
• Server and client side modules are purely JAVA based and make extensive use of the serial port COMM API and JMF API.
• Customizable to any small ISP setup.