Instruktážní video ukazující nastavení adaptéru Grandstream HT286 pro volání přes internet běžnými telefony.
Grandstream HT286 Reboot.
Grandstream HT286 Firmware Upgrade Problem.
VoIP System for Enterprise Network
Moo Wan Kim and Fumikazu Iseki
Tokyo University of Information Sciences Japan 1. Introduction
This chapter describe VoIP system for the enterprise network (e.g. company, university) based on Asterisk(http://www.asterisk.org). Asterisk is a kind of open source software to implement IP-PBX system and supports various necessary protocols to realize the VoIP system such as SIP, H.323, MGCP, SCCP. First the main ideas and development process are described based on the VoIP system that we have developed by using Asterisk in the Intranet environment. Then the new scheme to realize high security by using Open VPN is described when developing the large scale enterprise network.
2. Basic idea
The following are the main requirements to develop the VoIP system for the enterprise network (Yamamoto et al., 2008) a. Scalability In the environment of the enterprize network, it is not easy to anticipate the traffic because there are lots of uncontrollable factors. So developing various ...