Configure multiple ISP on different VLAN

ISP -1 Default VLAN / ISP -2 Default VLAN And Need VLAN Create 2525 For ISP 2 And Port Untag Mode And All 4 Pon Port Tag To 2525 VLAN

BSNL Configuartion GPON OLT
MGNT VLAN – 110
Customar VLAN – 128-500
Voice VLAN – 1830,1831,1849

MGNT – 10.215.173.58
Subnet Mask – 255.255.255.0
Gateway – 10.215.173.1

OLT Cascading,Connect two Mini OLT