NewTek TriCaster 300 - Manual (Page 230)

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15.6.2 STREAMING PROTOCOLS
Additionally, there are two primary streaming methods, known as Pull and Push. Choosing the
best method for your needs is important. Let’s review each, and consider what is best for your
needs.
PULL BY END USERS
Simply put, the Windows Media Encoder in TriCaster™ allows your (networked) audience to
connect directly to it, and it distributes the stream to them.
Connecting in this manner requires you to have a connection with sufficient bandwidth to deliver
a stream to each individual user. For this reason, the simple Pull streaming method rarely works
well for more than 1 or 2 viewers.
 Advantages:
o When TriCaster™ is not behind a firewall or does not have a public IP address,
this is a very simple way to let a few viewers watch your program stream.
 Disadvantages:
o Requires either a public IP address or requires users to be on the same
network. Facilities such as hotels or convention centers will usually not provide
a public IP address. Even if they do, getting them to open holes in their firewall
is next to impossible.
o If TriCaster™ is behind a router, your router must be configured to ‘port
forward’.
o Requires significant bandwidth -- for example, with TriCaster™ connected to
the Internet by a DSL or Cable Modem line, upload bandwidth is often less than
400kbits/second. Allowing for network overhead, at best a 320kbit steam can
be accommodated. This bandwidth would be fully consumed by two viewers
watching 160kbit streams, or a single viewer pulling a 170-320kbit stream.
(Even a T1 digital line can only handle four simultaneous 300kbit streams)
.