EX30 used to expand E1/T1 interfaces. It support 1 E1/T1 interface. Yeastar's EX30 Module has 1 on-board E1/T1 PRI port and is compatible with Yeastar's S-Series S100 and S300 models.
Yeastar EX30 PRI Card
The Yeastar EX30 expansion board adds one T1/E1/PRI port to a Yeastar S100 or S300 IP-PBX. When you need to connect your VoIP phone system to a digital phone system, the EX30 makes it simple.Yeastar EX30 has one onboard E1/T1/PRI port and supported Model: S100 and S300. 1 E1/T1 Port Expansion Board for Yeastar S100 and S300 systems Add up to 2 boards to S100 and up to 3 to S300 connect your VoIP phone system to a digital phone system, the EX30 makes it simple.