Kenwood TS-590S - Manual (Page 28)

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(Supplement): FAQ: Explaining the Internet "Cannot operate transceiver"
Fig. 1
As shown in Fig. 1, even though only one broadband router (BBR) is visible on the network,
in reality there are two. (Duplex router phenomenon.)
There are multiple modem modes with built-in BBR functions, so when connecting such a
modem as described above, there must not be two BBR paths connecting the PC to the
internet.
Consequently, even if the open port has been set for one BBR only, the required KNS
packets will not flow. For this reason, either set the required KNS port to open for two BBRs,
or stop one BBR function, and set the network so that there is only one BBR on the network.
Fig. 2
As shown in Fig. 2, in cases where the telephone is connected directly under the model,
nearly all modem models have a built-in BBR. In such cases, stopping the BBR built into the
modem stops the VoIP telephone functions connected to the modem, so VoIP telephony use
is disabled.
To prevent the VoIP telephone functions from stopping, stop the functions of the BBR
connected to the front of the PC, and set the port required by KNS to open in the BBR built
into the modem.
Caution:
Change any settings such as open BBR ports at your own risk.
If you do not have confidence in the settings, we recommend you stop using the system.
Modem BBR
Internet
Modem BBR
Internet