Create an E1/T1 Trunk

To create a PRI E1/T1 trunk, you need to install EX30 expansion board on S100/S300 and connect the E1/T1 port to the PRI provider with an PRI cable.

  1. Install EX30 expansion board.
    1. Power off the PBX.
    2. Open the upper case of the PBX.
    3. Push out the empty board from the inside of the device, push in the Expansion Board EX08.
  2. Connect one end of ISDN PRI cable to the E1/T1 port on the PBX, and connect the other end of the cable to the ISDN provider equipment.
  3. Log in the PBX web interface, go to PBX Monitor > Trunks to check the trunk status.
    If the trunk status shows , the physical layer of this trunk is correct.
    If the trunk status shows , the physical layer of this trunk is incorrect, check the PRI cable or contact Yeastar support to solve it.
    For more information on trunk status, see E1/T1 Trunk Status.
  4. Go to Settings > PBX > Trunks, configure your E1 trunk according to the parameters that are provided from the ISDN carrier.
    • Name: Give this trunk a name to help you identify it.
    • Interface Type: Specify the interface type according to the trunk specification.
    • Signaling: Specify the signaling according to the trunk specification.
  5. Configure other E1/T1 trunk settings as your need.
  6. Click Save and reboot the PBX to take effect.
  7. Go to PBX Monitor > Trunks to check the trunk status.
    If the trunk status shows , the trunk is ready for use.