We are having some issues with 2 Linksys SPA942's and one Linksys PAP2T which initially register fine on PBXES.
However on re-registration ('Register Expires' currently set to 2400sec) all the Linksys equipment fails to register with the error "Can't connect to login server".
At the next re-registration cycle it seems to work again. This issue does not occur on SIPDROID or on a softphone client.
I have searched through the forum and can not find any answer that is applicable to this.