[cisco-voip] Ports for credit card machines

[Pawlowski, Adam]

If it were SIP land I'd tell you that you either weren't allowing the ata to re-invite to the gateway or you didn't open the whole RTP range. 

The ATAs have worked great as described with faxes and TTY units, modems are sorely lacking with those. A lost cause as well on the VG248. While you may get it working (and if there's some magic configuration outside of the provided documentation that allows it to do so, by all means - post !) probably want to save yourself the headache with an adapter specified to do so. As for your reply the firewall settings, though, should be applicable to any device not just the credit card machines.