Woodstone's Servers Alive has built in support for PageGate and can be easily integrated with PageGate's GetAscii module.
To start, you'll want to install PageGate on the Servers Alive system. You'll also need to create a directory for the integration to reference. It can be any folder on any drive the PageGate server has access to. We recommend creating the following directory:
Open the PageGate Admin.
Go to Interfaces - GetAscii - Settings.
Set the "Polling Directory" to the integration folder you created.
Click on Apply.
When prompted, you do want to enable this for all existing groups and recipients.
For information on how to configure Servers Alive to reference PageGate, have a look at page 64 of their documentation here http://www.woodstone.nu/salive/doc/salivedocv8.pdf