Expansion Board

EX08 has 4 onboard module slots and 8 interfaces on the panel.
Supported Model: S100 and S300

EX30 has 1 onboard E1/T1/PRI port.
Supported Model: S100 and S300
| Brands | Yeastar |
| Compatibility | S100 and S300 |
| Ports | 8 xRJ11 ports |
| Slots | 4 onboard module slots |
| Properties | Supports up to 4 optional modules |

