diff options
| author | Philipp Maier <pmaier@sysmocom.de> | 2023-03-21 15:09:38 +0100 |
|---|---|---|
| committer | Philipp Maier <pmaier@sysmocom.de> | 2023-03-21 15:09:38 +0100 |
| commit | 64c0e6e11ce81dcaf01c836241f64aa96192d572 (patch) | |
| tree | 900905166fa3d198c28cf0657b7536edb2365459 | |
| parent | 563652890c8419589c2abb68cba780c34d7b22d4 (diff) | |
doc: overview: replace section TRAU mapper / E1 sub-channel muxer
The manual contains a section about a TRAU mapper / E1 sub-channel
muxer. This section seems to be copied from the OsmoNITB manual. In
OsmoNITB everything was integrated in one binary, now dealing with TRAU
frames is the task of the MGW. Let's remove the section but still leave
a word about how Speech traffic is handled/relayed by OsmoBSC.
Change-Id: If33589feb80e1b29b4f841b678fe5329b8c06a76
| -rw-r--r-- | doc/manuals/chapters/overview.adoc | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/doc/manuals/chapters/overview.adoc b/doc/manuals/chapters/overview.adoc index a27b0bf22..aca0c982f 100644 --- a/doc/manuals/chapters/overview.adoc +++ b/doc/manuals/chapters/overview.adoc @@ -135,11 +135,13 @@ Station Controller, i.e. For more information, see <<net>>, <<bts>> and <<bts-examples>>. -==== TRAU mapper / E1 sub-channel muxer - -Unlike classic GSM networks, OsmoBSC does not perform any transcoding. -Rather, a compatible codec is selected for both legs of a call, and -codec frames are passed through transparently. In order to achieve this -with E1 based BTS, OsmoBSC contains a E1 sub-channel de- and -re-multiplexer as well as a TRAU mapper that can map uplink to downlink -frames and vice versa. +==== Speech traffic + +OsmoBSC, by itself, does not perform any transcoding or relaying of user plane +speech traffic. This task is handled entirely by a BSC co-located media gateway, +such as OsmoMGW, which will take care of relaying the RTP traffic from the BTS +into the core network. + +In case classic E1 based BTSs are used, OsmoBSC will instruct the MGW to +convert between TRAU frames on the E1 side and RTP frames on the IP based core +network side. |