ProntoNetLC User Manual
124
VI.7 SIP
The European Broadcast Union (EBU) is promoting the interoperability of audio
codecs for any manufacturer. For this purpose the use and the application of a
subset of the Internet Protocols has been proposed. This effort will allow to
setup in a friendly way audio streaming communications between several
vendors of equipment.
The deployment of SIP Protocol Servers among the network will support calling
remote parties just by invoking their network name regardless of the actual
public o private IP addresses. Neither is required to manage the office routers
and the firewall’s TCP/IP ports for any new communication path.
The physical location, often related to fixed IP addresses or subnets, is not
further meaningful. In this sense, specially portable audio codecs will profit with
an easy call procedure. Neither is required to agree ahead on the audio
compression type and data stream rate, because the SIP Protocol manages by
itself to negotiate the convenient communication details with the remote party.
For Prodys’ former customers performing a call using SIP is much the same as
using Prodys’ proprietary protocols given that the SIP configuration is set.
SIP supports up to date only unicast streaming. Any PortaNet’s audio
compression mode is supported also if SIP protocol is in use.
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For further details
please refer to the “Technical Description” at this document.
SIP Port: TCP/IP port dedicated to SIP signalling for establishing, updating
or finishing a call. Port 5060 is mandatory by the standard if direct calls without
gateways are expected.
Audio Port: TCP/IP port dedicated to the RTP communication, this is the
actual port for the audio streaming payload. By default the number 5004 is
reserved.
If SIP server support is granted by your network:
Server IP: IP address of the SIP Server. At this point is registered
periodically the proper user information for full protocol support.
Timeout: Time in seconds before the user information registered at the
previous server is flushed. Therefore the information about the SIP user are
updated from time to time.
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The apt-X compression is still undefined by the EBU draft. For compability reason this mode is
not supported if SIP protocol is selected.
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