What is the difference between 10GE POS, 10GE LAN and 10GE WAN?

[caoxianglei]

hi guys here,

please give me the key point across them.

[viyuan700]

in 10GPOS card you will have a 10G port which you can connect to your switch and 1 10G SONET port which you can connect to SONET box

10GE LAN to be connect to a 10G switch

10GE WAN can be given directly to a SONET box/DWDM box

[caoxianglei]

can you give me some details across them about encapsulation.