VoIP Server
SIP Express Router (User Registration, Authorisation and Call Routing)
- Installed and configured SIP Express Router to accept origination calls from Soft and Hard Phones.
- Written Perl script to calculate the Total minutes used based on ISD codes for each customer and update the same in Mysql server.
Installed and configured Asterisk Open Source PBX.
VoIP Hardware
Configured Quintum Tenor Series, VocalTec and VegaStream Gateways
Configured Various Voip Hard phones like Cisco and Grandstream.
User Authentication and Accounting
Designed , Installed & programmed a Centralised User Authentication and Accounting server.
- Components used FreeRadius, Mysql , PHP and Perl Scripts.
- All the Wireless clients, Fiber and cable customers are authenticated by this radius server.
- Data Transfer and minutes used are collected by Accounting server.
- Using PHP & Perl scripts, collected accounting data are manipulated and stored in Mysql.
Prepaid New Connection and Renewal Process
Designed and implemented the Prepaid System, where Temporary Password keys are generated and stored in the database. The temporary account created and renewal process enabled the introduction of off-the-shelf customer kits.
- Technical environment : Php & Mysql.
E-mail and Web Server
Installed and configured E-mail server which supports POP3, SMTP , IMAP and Webmail with Spam Control.
- Technical environment : Qmail, Squrrielmail, Spamassain, Mysql & Apache Webserver.
Installed and configured Web Server and DNS Server.
- Technical environment : Apache & Named DNS Server.
Caching and Transparent proxy Server
Installed and configured Squid Caching server.
- Technical environment : Squid proxy server and IPtables.
Helpdesk Management Server
Designed and Programmed Helpdesk Mangement Server.
- Technical environment : Apache, Mysql & PHP.
Wireless Networking
Designed and Implemented Various Base Stations in Chennai, covering a 10 K.M. Radius area.
- Using Custom built Atheros based Wireless radio and Wrap motherboard.
- Designed and Custom made Dish Antenna for 2.4 Ghz.
- Installed and configured Star-Os router to manage the wireless links.
- Configured the router to accept PPPoe connection over wireless and authenticated using centralised Radius server.
- Designed and implemented various Point to Point Wireless links.
Router and Access Servers
* Configured Various Cisco routers and Access servers like Livingston Portmaster & Perle.
* Designed and implemented QoS-driven bandwidth feature in Cisco router.
* Implemented and mantianed Leased line connections using RAD and Pairgain Modems.
* Implemented and maintained Analog Dial-up Access servers using Lanstream and Cisco.
* Designed and Implemented Fiber networks for Metropolitan Area Network.
