DP83TD510E: 10 Base T1-L Port Schematic Verification

Part Number: DP83TD510E

Hi Team , 

Please review the attached schematic of industrial ethernet ( 10 Base T1-L ) . I'm planning to implement this over 1700m with 2.4Vp-p.

Along with this , could you please answer following queries - 

1. Does this interface requires isolation from main system ? Is using transformer advised for this ?

2. Regarding protection , what all kind of protection devices are required at 10-Base T1L ports ?