Wen Yih's Industrial Training Life: Week 2

12 April 2010:

Today I did research on Session Initiation Protocol (SIP). It is a signaling protocol, widely used for controlling multimedia communication sessions such as voice and video calls over Internet Protocol (IP). The protocol can be used for creating, modifying and terminating two-party or multiparty (multicast) sessions consisting of one or several media streams. The modification can involve changing addresses or ports, inviting more participants, adding or deleting media streams. I am suppose to focus on codes g.729, g.726 and g.711

SIP Proxy Server

13 April 2010:

Today I was asking to create a SIP account on asterisk and setting up X-Lite. First I need to log in my company asterisk server to create a user account. Then I need to download soft phone X-Lite from internet. My extension number is 1234. At last, I can call other user. For mail box message, can dialed 8888. Other than that, I also did some research on Host Media Processing (HMP). It is a software-based technology which replaces hardware telephony boards. These boards did all the media processing work and had special interfaces for connection with PSTN. Gridborg HMP, since it is software-based, requires no special hardware and runs on PC. Connection with PSTN is established using VoIP technology.

Soft phone X-Lite

HMP was introduced, telephony boards can be replaced with a software running on PC and using VoIP for PSTN connectivity.

14 April 2010:

Today I learnt about WellRec 5600 VoIP Recorder and WellSIP 6500 Telephony SIP Proxy Server. WellRec 5600 is a dedicated VoIP recorder for Welltech SIP network architecture. WellRec 5600 will do the recording on demand no matter incoming call or outgoing call. Through the web interface, administrators can easily search and play the recorded VOIP call anywhere. It provides a very cost/effective solution to meet your VOIP logging service. WellRec 5600 can also be a lawful interception or voice monitor system. Administrator can monitor the conversation real time either by recording channel or selected subscriber without any delay.

The Welltech WellSIP 6500 series SIP Telephony Server is the best choice to your convergence VOIP network which covert the requirements from enterprise to service provider. With built-in rich telephony services, WellSIP 6500 enables traditional PABX features to your VOIP convergence platform. Also you can easily upgrade the license or provide the high available service according to the growth of your business without any hardware changes.