Cisco 2000 User Manual page 113

Broadcast Method: There are several different broadcast types for streaming Real format video to a
Helix Server. They are as follows:
• Push, Account-Based Login (Helix Server)
o Account-based, push broadcasting allows you to send a stream to Helix Server
version 9 or later. In this method, Cisco Digital Media Encoder 2000 maintains a
monitoring connection to Helix Server. This connection allows it to pass a user name
and password to authenticate access to the server. Helix Server uses this connection to
send statistics about the broadcast stream back to Cisco Digital Media Encoder 2000.
• Push, Password-Only (Helix Server)
o Unlike account-based broadcasting, password-only broadcasting does not establish a
monitoring connection. It therefore incurs less network overhead, but it receives no
feedback from Helix Server. This broadcast method allows you to send a live stream
to Helix Server version 9 or later. However, you must set up the server as a receiver
in a splitting arrangement. Please refer to the Helix Server documentation included
with the Helix Server for details.
• Push, Multicast (Helix Server)
o In a multicast, Cisco Digital Media Encoder 2000 can deliver the same broadcast
stream to any number of Helix Servers without increasing its outgoing bandwidth.
The Helix Servers will need to be pre-configured for a multicast from Cisco Digital
Media Encoder 2000. Refer to your Helix Server documentation for details.
• Pull (Helix Server)
o In pull broadcasting, Cisco Digital Media Encoder 2000 begins to generate broadcast
packets as soon as you start the encoding. However, it does not deliver the broadcast
stream until Helix Server requests the stream, which occurs when the first RealPlayer
user requests the broadcast. Pull broadcasting saves bandwidth between Cisco Digital
Media Encoder 2000 and Helix Server when no one is viewing the broadcast. This
broadcast method allows you to send a stream to Helix Server version 9 or later.
• Legacy Push (8.x, 7.x, G2)
o The legacy push method is similar to the account-based push method. It does not use
a monitoring connection to provide server feedback and statistics. However, it is not
as robust a broadcast method as account-based push. Use this broadcast method only
when sending a broadcast stream to a server predating Helix Server version 9, such as
RealSystem Server G2, 7, or 8.
Transport Protocol: When you use a push broadcast method, you specify whether to use UDP or
TCP when delivering the broadcast stream to Helix Server. UDP is the preferred protocol because of
the lower network overhead. But you may want to use TCP when delivering the broadcast over a
lossy environment.
For the Server Address field, enter the IP address or DNS name of the Helix Server used for the
broadcast, such as 207.188.7.176 or helixserver.example.com.
Cisco Digital Media Encoder 2000 User Guide
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