On Thu, Nov 30, 2023 at 09:17:58AM +0000, jheyrendt.ext(a)orange.com wrote:
if we look to the schema, do we need an Osmocom-mgw ?
We presume Yes
OsmoBSC requires a co-located MGW. So far all of our users that we know of use
osmo-mgw for that. The MGCP protocol is standardized, so it would be
interesting to interface with a third party MGW and see what happens.
If Yes, Is it possible to just have one Osmocom-mgw
hosted on the
Osmocom-bsc ?
Yes of course
In this case, There will be RTP traffic between
Osmocom-bts and Osmocom-mgw
(hosted on Osmocom-bsc)
And there will be RTP traffic between Osmocom-mgw (hosted on Osmocom-bsc)
and mgw Ericsson.
And there will be MGCP traffic between Osmocom-mgw (hosted on Osmocom-bsc)
and Osmocom-bsc.
Yes, the reason why Osmocom is divided in so many components is that you may
interface with third party components at "any" edge.
The scenario you describe above is what some of our users do: OsmoBSC is
responsible for the BSS "sphere", including the BSC co-located MGW. OsmoBSC
talks 3GPP standardized A-interface towards an Ericsson MSC. OsmoBSC does not
interact with or even needs to know anything about the MSC's MGW setup, it only
sends the call leg's RTP to the RTP address:port that the MSC indicated in the
BSSAP Assignment Command. It does not matter what component/what brand of MGW
that RTP address:port belongs to, as far as the BSC is concerned.
Of course the hard part is configuring all the details correctly. Sometimes we
also need to resolve a customer's CN's specific peculiarities by implementing
new features, and occasionally we find and fix bugs in Osmocom that we did not
know about yet. So if you have problems with integration that you need
assistance with, one option is the dedicated commercial support that is
available for Osmocom, for example from info(a)sysmocom.de (my employer). You may
also get assistance here on this mailing list, where individual community
members invest their own free time free of charge.
~N
--
- Neels Hofmeyr <nhofmeyr(a)sysmocom.de>
http://www.sysmocom.de/
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