13 Oct
2020
13 Oct
'20
2:21 a.m.
On 10/11/20 4:58 PM, Rob Janssen wrote:
I don't know how wide its coverage is, but here in
Europe we have a network
of Asterisk PABXes on AMPRnet that have interconnecting trunks between them
that allow you to call anyone on the network on their roaming number.
Phone numbers are allocated based on the callsign (using a scheme based on
the letters printed on DTMF keypads. based on my callsign, my phone number
is 713210234253 for "1st letter on key 7, 2nd letter on key 3, digit 1, 3rd
letter on key 2, 2nd letter on key 4, 3rd letter on key 5" giving PE1CHL ).
The DUNDi trunk protocol distributes the information about the home server
for each number across the network, so all Asterisk servers know how to
route the calls.
It is easy to host a conference on one or more of the Asterisk servers and
have everyone dial in to that. There is such a conference running on my
local
server where I have my IP phone connected all the time.
I think such systems can do low-bandwidth video as well, but I have never
tried that. For audio it works perfectly.
We also have a network of PBX's tied
together here in the US but using
AREDN Mesh connectivity. Phone numbers are a flat 4-digits for local
calling. For wide area calls, the person's (or service) 3-digit area
code is prepended to the 4-digit local number. There are around 40 pbx's
scattered around the world on this network. There is a White Pages
directory to determine a person's (or service) phone number.
It would be interesting to try to connect the two systems together.
73, Mark, N2MH
MeshPhone: 973-2111
MeshMail: n2mh(a)n2mh-mailhub.local.mesh
MeshDMR: Talk Group 6374