Presence Issus

[bhsu]

Hello Everyone~

I have equinox client mobile,when intranet,It's work OK.
(Presence,Video,Voice,all function OK )

When Internet(through SBCE),only presence no work,other function OK.
(Only Presence no work;Video,Voice function OK )

It's SBCE config issus?How can fix it.
When I traceSM,I can see Presence PUBLISH (intranet).
Internet(through SBCE), can not see Presence PUBLISH.

SMGR7.0,SBCE7.2.2,CM 7.0.1.3
Breeze3.2 snap in Presence7.0

Thanks~