Yeastar TE100 provides small and medium-sized enterprises with cost-effective additional products for traditional telephone systems to bring the real advantages of VoIP. TE100/200 is a single-port or dual-port VoIP E1/T1/J1 gateway (VoIP to E1/T1/J1, and E1/T1/J1 to VoIP), supporting up to 30 or 60 concurrent calls. It aims to bridge the gap between E1/T1/J1 and VoIP networks. Integrating the TE100/200 into an existing network will allow inexpensive communication through SIP trunks. Moreover, it can connect the VoIP system with E1/T1/J1 services from traditional operators.