ASTPP is an Open Source VoIP billing solution for Freeswitch. It supports pre-paid and post-paid billing with call rating, credit control and call reporting. It also provides many other features such as calling cards, least cost routing... more
ASTPP is an Open Source VoIP billing solution for Freeswitch. It supports pre-paid and post-paid billing with call rating, credit control and call reporting. It also provides many other features such as calling cards, least cost routing (LCR), did management, reseller management etc.
Deploying wireless campus network becomes popular in many world universities for the services that are provided. However, it suffers from different issues such as low VoIP network capacity, network congestion effect on VoIP QoS and WLAN... more
Deploying wireless campus network becomes popular in many world universities for the services that are provided. However, it suffers from different issues such as low VoIP network capacity, network congestion effect on VoIP QoS and WLAN multi rate issue due to link adaptation technique. In this paper a cross layer call admission control (CCAC) scheme is proposed to reduce the effects of these problems on VoWLAN based on monitoring RTCPRR (Real Time Control Protocol Receiver Report) that provides the QoS level for VoIP and monitoring the MAC layer for any change in the data rate. If the QoS level degrades due to one of the aforementioned reasons, a considerable change in the packet size or the codec type will be the solution. A wireless campus network is simulated using OPNET 14.5 modeler and many scenarios are modeled to improve this proposed scheme.
