The “Encapsulation” is selected according to the stipulation of how the input data stream has
been encapsulated by the transmission equipment. In RTP mode, every data packet must be
provided with an RTP header. This header contains numbering for the individual transmitted Eth-
ernet frames in order to detect and possibly re-sought Ethernet frames which have been lost or
have arrived in the wrong order on the receiver. Error correction is not included in the RTP header
(RTP: can only receive RTP frames / UDP can receive both but cannot use the RTP header).
A data stream can arrive with a CBR (Constant Bit Ratio) in the U 262 Gateway, or with a VBR
(Variable Bit Ratio). In any case, CBR is used for MPTSs (Multiple Program Transport Stream)
but also for SPTSs (Single Program Transport Stream). However, SPTSs can also be sent with
a VBR.
Under “Packet Mode”, it is possible to select between “continuous” or “burst” for configuring the
respective ASI output connected downstream of the IP RX.
The TSIDs and ONIDs are displayed for information purposes in line with the selected transport
stream and, to provide a better overview of the transport streams, it is possible for an alias to be
input. If no alias is input, the name of the first service of the transport stream is entered automati-
cally.
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User Guide U 262