AEQ
PHOENIX STRATOS
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SIP protocol operation diagram. Phase 1: Registration. Phase 2: Search for the called device in
the SIP server database. Phase 3: Establishment of the connection
This working method, supported by external SIP servers, enables the physical position of a
device to be made independent from its logic identifier and, through the use of the SIP protocol,
makes it unnecessary to know more data regarding the called device than its URI.
During the establishment of the communication phase, the encoding algorithm is negotiated
simultaneously, based on the Link Profiles / SIP Codec Profiles defined in each of the devices
at the two ends of the connection circuit.
C4.2. Possible work scenarios.
Depending on the type of network to which the PHOENIX STRATOS is connected, the codec
will have one or another type of IP address available to it.
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Static public IP addresses offer the ideal situation, since they guarantee that the IP
interface of the codec will always be assigned to a fixed address (regardless of whether
it is turned off and then powered up again) and directly accessible to the rest of the
network users. PHOENIX STRATOS operates perfectly with an associated SIP server
and equipment identifiers of the name@domain type (PROXY SIP), and even without
an associated SIP server with a URI of the name@IP-address type (DIRECT SIP) if the
device on the opposite end of the communication circuit also has an IP address of the
same type.
