Call forwarding from sip ata to pstn landline?

I have a sip ata and a ph hanging off it. All my sip calls come into the ata and are then answered on the ph. When I'm not in, I want to forward the sip calls to a pstn network and call my mobile eg sip to ata to ? to landline to mobile. Something like a gateway switch in the middle that can detect the inbound call (ata to ph), hold the call, launch a call on a pstn line and connect the two when the pstn line is answered. Can anyone help with a device that does this? thanks

Welcome to voipuser


What model of ATA have got? Does it have an ATA port?

Currently using a Dlink 2001S (1 ethernet port and 1 ph connection) but also have a Linksys PAP2 (2 ethernet ports a 1 ph connection)

The D-Link or PAP2 may be able to forward a call to a different voip provider and thus to PSTN. Check out the manual and see if that is the case.
If you have a normal PSTN line that you wish to forward then you will need something with an FXO port (I have a Linksys SPA 3102 but there are other similar devices).