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  1. DTMF not working ver 10

    Hi leejor, I have such issue too. The DTMF tone was not being sent to the other side. I am using Grandstream gateway GXW-4104 with Grandstream phone GXP-2100 & GXP-2110. I had checked the firmware, it is the latest version (1.3.4.13) Will you be able to help ? Thanks
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