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Sounds reasonable. As I am moving soon, I'll set up an identical
private node with a second AMBE dongle in another location, then
just switch to that for the duration of downtime.
On 11/17/2019 8:09 PM, Steve N4IRS
I'm going to suggest a alternative configuration.
Put your public ASL node on your VPS No radio interface needed.
Setup a private node at your house. Add AB, MB etc. Setup a full
time IAX connection between the 2 nodes.
On 11/17/19 7:43 PM, Mike Zingman -
Here is what I suspect (of course I could be wrong). USRP uses
UDP as its transport.
If you are using DVSM, you set the mobile client to talk to AB
on a single port. This setting in AB (where TX and RX ports are
the same) tells AB to use an enhanced protocol to talk to the
client. This enhancement is used to keep the NAT traversal path
open to the client. The trick is that AB will send keep alive
packets back to DVSM to tell the router/firewall that the NAT
connection should be maintained. As long as the keep alive
packets are sent often enough the router will maintain the
If you are using ASL as your USRP client to AB, you are using
two ports (TX and RX). AB does not try to tell ASL to keep
the connection open (since ASL would not understand the keep
alives). So, if you are using ASL on a different machine than
AB and there is a NAT between them, you will have problems.
Any of the above make sense?