Replication

Hello,

i need make with postgre something as this:

i have two servers S1 and  S2, connection is quit good, but sometimes once or twice per month there is short disconnection, longer discoonection 2x per year (1-2+ hours)
on both are running updates
i need have same data in time, but i never update same collumns on S1 an S2, S1 change another atributes than S2 =  there are no conflicts, on MS SQL i use transactional replication and i like find somethin same for postgre.

Can u please send me some info where can i found what i need, which postgre tool is right way for me..

Thnx a lot.