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35 lines
950 B
Plaintext
35 lines
950 B
Plaintext
Osmo SIP Connector
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==================
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Simple utility to map MNCC to SIP and SIP to MNCC. The VTY interface
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can be used to make configurations. The code doesn't have any RTP or
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transcoding support.
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Call identities can be either the MSISDN or the IMSI of the subscriber.
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Requirements of Equipment
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^^^^^^^^^^^^^^^^^^^^^^^^^
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* DTMF need to be sent using SIP INFO messages. DTMF in RTP is not
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supported.
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* BTS+PBX and SIP connector+PBX must be in the same network (UDP must be
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able to flow directly between these elements)
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* No handover support.
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* IP based BTS (e.g. Sysmocom sysmoBTS but no Siemens BS11)
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* No emergency calls
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Limitations
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^^^^^^^^^^^
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* PT of RTP needs to match the one used by the BTS. E.g. AMR needs to use
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the same PT as the BTS. This is because rtp_payload2 is not yet supported
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by the osmo-bts software.
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* AMR SDP file doesn't include the mode-set params and allowed codec modes.
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This needs to be configured in some way.
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