Wireless Access

i was checking about outdoor point tp point connection to connect 2 buildings using wireless  , distance is 1 Km

i Thought that MST200 will give a certain throupghput , while MSR1200 fro example will give higher ?  however a colleague told me that MST & MSR X  all will give same throughput becaue maximum gain restricetd at our country is 14 dbi ? is this right ? 

Same throughput.  MST-200 is the better option for a single point to point, because the antenna is built in.

Thanks alot , but if all are the same throughput when to choose other modles rather then MST200 ? we will always choose it as it is Lower price ?  what is benefit of MSRs ?

The MSR is when you need more than one radio, like if you are doing a point to multi point, or you are serving clients and backhauling on the sam access point.

The MST provides a small form factor with a built in antenna at a reasonable cost.

and the fact that MSR is Omni directional while MST in unidirectional doesnot make any difference ? even if both has same gain ?

The MSR does not come with any antennas.  You purchase those later.  The MST 200 is designed for point to point connection and comes with an included directional antenna.

Thx ...