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doc: Mention the `gb-dialect` vty option, as it is quite essential 

We should have introduced this documentation snipped years ago, when
first introducing IP-SNS support in libosmogb/osmo-pcu.

Change-Id: I83709b7231c2a3930e1b3f09b737319fb7d7e741
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Harald Welte 2024-03-09 20:00:13 +01:00
parent 874aac5953
commit 2262916e0c
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doc/manuals/chapters/overview.adoc
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@ -106,6 +106,19 @@ in turn part of the libosmocore software package. This allows the same
Gb implementation to be used from OsmoPCU, OsmoGbProxy as well as Gb implementation to be used from OsmoPCU, OsmoGbProxy as well as
OsmoSGSN. OsmoSGSN.
The Gb Implementation supports two different dialects:
* `classic` dialect, which implements a non-standard dialect from the days
where Frame Relay was the default and no IP transport had yet been
specified by 3GPP.
* `ip-sns` dialect, which implements the 3GPP standard for NS-over-IP,
including the IP-SNS protocol.
In case of doubt, and assuming you are directly interfacing to a
modern 3rd party SGSN, use the `ip-sns` dialect.
Selection of the dialect is done using the `gb-dialect` VTY option at the `pcu` node.
[[pcu_sock_iface]] [[pcu_sock_iface]]
==== `pcu_sock` Interface to OsmoBTS/OsmoBSC ==== `pcu_sock` Interface to OsmoBTS/OsmoBSC