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dtmf issues on media gateways in U.S

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Smit666

Technical User
Aug 7, 2009
5
GB
I have media gateways world wide that all work fine, I have just added a port network in the US. This site also works fine, but then I have 4 media gateways of this that all have issues dialing dtmf. the sites are 3 g450 and 1 g350 all sites are using dcp phones, but cannot dial vm unless you dial really slowly.
 
Im curious on the 450s codecs . seams they run 729 from the box and have issues talking from one station to the next on the backplane. It has been my experience to investigate the network map codec layouts, focus on the 450's and check the rest of them as well. a new subnet will use IP-codec-set 1 by default. Good luck!

Surprise! Most loopback jacks are located conveniently behind the ear and above the leg
 
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