VoxiPlus
Advanced
INSTALLATION MANUAL
© 2008 TOPEX S.A.
page
43
b) the equipment allows the translation of the calls initiated from PSTN
network, and transported over the IP network into mobile network.
A FXS phone call is initiated and converted to IP through a VoIP gateway. The IP packet is
transmitted through the Internet toward the VoxiPLUS equipment.
TOPEX equipment achieves the conversion of the IP call into mobile to mobile call through its
embedded GSM / UMTS modules.
Figure 23 – Fixed to mobile conversion
c) VoxiPlus achieves mobile to mobile calls through the IP network.
The costs savings are achieved by the transport of call through the IP network instead a direct
call between two different mobile networks, or between two mobile networks from different countries.
A GSM user initiates a call to the local TOPEX VoxiPLUS equipment. The call is directed to
GSM module belonging to the same carrier as the caller. The VOXI box sends dial tone, so the
calling party can enter the phone number of the destination.
The mobile call is converted to a VoIP call and it is transmitted on the Internet.
At the other end you have anotherVoxiPLUS box. Here the VoIP call is converted back into a
mobile call to the local carrier and sent to the destination.
Figure 24 – Mobile to mobile call through the IP network
