Hello, friend!
Only the MA5620 with two SFP upstream ports supports GE upstream transmission (optical modules are required).
The MA5620 of other versions supports only PON upstream transmission. All FE ports (LAN ports) cannot be used for upstream transmission.
If the SIP voice service needs to be directly transmitted through the LAN port, configure local switching (the upper-layer Softswitch needs to receive signaling).
Thanks!