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New Member

VG204 Connectivity


I have an issue where a credit card terminal via a VG204 SCCP won't connect. I keep getting a communication error message. I am able to hook up an analog telephone and dial to where ever I want and i'm able to receive a call as well. I have this working at other sites using the same configuration, is there anything that I can tweak on this particular VG204? What is equally confusing is that the credit card machine will work at this site with an ATA186. The IOS is version 15.1 but I don't think that has any bearing. HELP ANYONE???




Check the fax/modem relay

Check the fax/modem relay settings in CUCM, and make sure they are off/pass-through.


Credit card machines (and also franking machines) tend to be very picky about their phone lines. They don't like down-speeding when they can't do something like V.34/V.90 speeds (Which is impossible on a VoIP line), so try forcing the machine to run at a slower speed e.g. V.32. (Unfortunately you can't always do this, so you then get stuck and have to install an analogue exchagne line:-(  )



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New Member

Thanks Gordon, everything

Thanks Gordon, everything looks good on the CUCM and other VG devices are working fine at other sites. I guess this particular cc machine is extra touchy.

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