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zecke2, 02/19/2016 10:48 PM

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== The cellmgr_ng project ==
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The cellmgr_ng was initially written to allow to hook a BTS/BSC behind a traditional E1 link
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with MTPL1, MTPL2, MTPL3 to a soft switch supporting the the ipaccess protocol. The MTPL1
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and MTPL2 is handled by a vendor solution right now, everything starting from MTPL3 is
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available in source. The code supports interfacing with the hardware encoders and can send
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and receive RTP with AMR and is controlled with the MGCP protocol.
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=== Applications ===
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==== cellmgr_ng ====
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This application implements forwarding of SCCP from the MTPL3 linkset to the IPA protocol,
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it supports connection tracking to work around implementation problems of various BSCs
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and to handle the event of network disconnection without taking the MTP Linkset down.
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==== udt_relay ====
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A simple version of the cellmgr_ng that just relays between the MTPL3 linkset and the
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connection to a MSC or similiar system.
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==== osmo_stp ====
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This a Signalling Transfer Point or a Media Gateway. It can handle a MTP L3 linkset and
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a M2UA connection. Right now it does not support fail over in M2UA but this can be added
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easily. It has basic support for ISUP blocking/unblocking/reset.
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==== mgcp_mgw ====
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Use the OpenBSC MGCP Protocol and Network implementation and interface with the
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hardware to provide the gateway from E1/T1 to IP/RTP.
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