WEEK 2 (12-16 APRIL)

This week was kinda exciting. Beginning of the week, I did some research on Session Initiation Protocol (SIP). SIP is a signaling protocol used for establishing sessions in an IP network. The protocol can be used for creating, modifying and terminating two-party (unicast) or multi-party (multicast) sessions consisting of one or several media streams. SIP responses are the codecs used by SIP for communication. The codecs that I focused was g729, g726 and g711.

SIP configuration

After doing some research on SIP, the next day task was involving application on SIP. Firstly, I logged in into AsteriskNow server of this company and created an user extension. My extension number is 1115. Next, I downloaded free softphone XLite from the internet and configured the settings of the softphone. Finally, I tested the softphone by making calls to networked users. To hear the mail box messages, extension number 8888 can be dialed.

Softphone XLite

Besides that, I also learned about Host Media Processing (HMP). Dialogic HMP software performs media processing tasks on general-purpose servers without requiring the use of specialized hardware.


The next day, I was exposed to Welltech 6500 and Wellrec 5600. Welltech is the IP PBX system to operate on a variety of VoIP applications. The Welltech WellCIP 6500 series SIP Telephony server is the best choice to convergence VoIP network which convert the requirements from enterprise to service provider. Wellrec 5600 is a VoIP recoder for Welltech SIP network architecture.

Welltech 6500 and Wellrec 5600

My last task for the week was building a custom Interactive Voice Response (IVR). IVR is a technology that automates interactions with telephone calls. I downloaded Zoiper softphone from internet and configured the settings with my user extension. Then, I connected the IP phone and made phone calls from the IP phone to the softphone and vice versa.

IP phone



Testing the softphone and IP phone