MyPBX Standard is an embedded hybrid PBX designed for small businesses with up to 100 users. It offers flexibility by integrating ISDN, PSTN lines, and VoIP/GSM/UMTS trunks, allowing businesses to reduce communication costs by taking advantage of VoIP technology while maintaining reliability through traditional phone lines. It provides enterprise-class communication features through an easy to use web interface and supports a wide range of IP phone models.