I have a VoIP network, of two Cisco 1750-4V, two Cisco 1751-V multiservice routers and two ATA-186 voice gateways.
The communication between any 1750-4V and ATA-186 devices is flawless in both directions. However, when we try to make a call from 1751-V (FXO or FXS port) to the ATA-186, it's impossible. The communication from any ATA-186 to any 1750-4V, the other ATA-186, and any 1751-V (FXO or FXS port) is flawless.
I don't know if a newer version of ATA-186 flash ROM (actually there is 2.07 version) will solve this problem?
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