Configurations
of GSM/VoIP networks allow the service providers to avoid the local Wired
Public Switched Network (PSTN) in communication with a GMS mobile handset. As a
result, the high rates charged by telephone companies are avoided.
Digium Wildcard TDM410 is a half-length PCI 2.2 compatible card that supports FXS and FXO interfaces for connecting analog telephones and lines through a PC, it was developed as a replacement for TDM400P. By using IP-PBX Asterisk Open Source software and a standard PC, the user of Digium Wildcard TDM410 could build a small office telephone system, which will have all of the sophisticated and useful features of modern telecommunications equipment for big business.