Tieline ViA User Manual page 103

Important Note: Failover and SmartStream PLUS redundant streaming are not available
with SIP or sessionless IP connections.
SmartStream PLUS Redundant IP Streaming
Tieline's proprietary SmartStream PLUS IP technology ensures you're always on the air. The codec
features dual Ethernet IP ports allowing two completely independent IP connections. There are three
levels to SmartStream PLUS IP streaming.
1. The codec can stream simultaneous redundant data streams from both Ethernet ports and
deliver seamless redundancy by switching back and forth, without loss of audio, from the
nominated primary data link to the backup link if one fails and then subsequently recovers.
Use IP links from two different IP network providers for optimal redundancy over mission
critical connections.
2. Second, when multiple redundant audio streams are sent, the decoding codec automatically
reconstructs audio into a single stream on a first packet arrived basis, to minimize program
latency and ensure audio integrity.
3. Third, SmartStream PLUS features automated jitter buffer management and Forward Error
Correction (FEC) and these advanced network management tools deliver uncompromising
audio quality, while dynamically responding to variable conditions over unmanaged IP
networks like the internet.
These combined measures ensure Tieline is capable of offering a rock solid IP audio solution for
broadcasting IP audio economically and efficiently across broadcast networks. See the procedures
for configuring different programs
On-Demand Failover (IP, ISDN or POTS)
On-demand failover requires configuration of a primary connection and an on-demand 'cold' backup
connection. On-demand failover is activated when the dialing codec program detects the loss of the
primary connection, or if audio streaming ceases. The backup connection is then dialed to replace
the primary connection.
The codec can be configured to switch to a backup connection over IP, ISDN or POTS as required.
For example, you can create a program with IP as the primary connection and also create a backup
ISDN connection, or a backup POTS connection in the same program. Note: ViA has a single
module slot and can connect over POTS or ISDN if a ViA POTS or ViA ISDN module is installed.
For details on configuring backup connections using failover see
to-Peer Programs.
Forward Error Correction (FEC)
FEC transmits a secondary stream of audio data packets over a single connection. If packets are
lost or corrupted over the connection then replacement FEC data packets can be substituted to
replace them.
Note: FEC should not be confused with SmartStream PLUS. FEC packets are sent over a single
data stream connection, whereas SmartStream PLUS dual redundant streaming transmits two
completely redundant audio data streams. FEC is also a subset of features within SmartStream
PLUS, which means you can configure SmartStream PLUS dual redundant data streams and also
configure FEC on each of these data streams. For more info on FEC see
Correction.
© Tieline Pty. Ltd. 2017
using the web-GUI for more configuration details.
ViA User Manual v2.0
Configuring Mono or Stereo Peer-
Configuring Forward Error
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