I have a VOIP PBX
I need to add PSTN gateway to be able to call land-lines
to save the price of the PSTN gateway, I need a software that work as PSTN gateway using the standard modem
Tags: Voip To Pstn Is There Any Software That Can Use the Standard Modem as PSTN Gateway for VOIP PBXs?
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The Linksys SPA3102 is also a good option with one FXS and one FXO port for interracing with PSTN network
http://www.linksys.com/servlet/Satellite?c=L_Product_C2&childpagename=US%2FLayout&cid=1146582257191&pagename=Linksys%2FCommon%2FVisitorWrapper
You do need an hardware ATA (analog telephone adapter) with FXO port to interface between IP-PBX and PSTN network.