I have 8 ports STM card installed in my ONS 15454, a customer want to connect central site to 3 remote sites. The connection between the customer and us is on optical STM1 connecting to port 1 on ONS. The three other sites will share this STM1 in this ratio Site1-30E1, Site2-18E1 and Site3-15E1. All I have on the ONS is this 8-ports STM1(OC3IR-STM1SH-1310-8). All the remote site are connected using optical. Will this solution be achievable without using any other cards?