(English) 2019 eBook

TO SIP OR NOT TO SIP
interview with Jacob Daniluck
Jacob:
Connecting over SIP should be straightforward if you use the designated encoding
algorithms and other settings as mandated in the EBU N/ACIP Tech 3326 standard.
However, it’s not always as straightforward as it may seem.
Insider:
Can you give us an example?
Jacob:
SIP does have it’s place from an interoperability perspective, but it also has it’s downside.
Before using SIP over IP, it is useful to understand that SIP often requires both codecs
to be configured with the same settings before connecting or the connection may fail.
We’ve also found that not all professional codec manufacturers are fully compliant with all
requirements for interoperability.
Insider:
So… it’s not as straightforward as it may seem?
Jacob:
Not always, however with a bit of knowledge, and perhaps some trial and error from timeto-time,
we can get Tieline codecs connected to all the major codec manufacturers.
Insider:
Is there anything else we should know about SIP?
Jacob:
SIP does not support advanced software enhancements which deliver redundancy and
rock-solid reliability over IP, for example, failover connections, redundant streaming, IP
bonding, or error concealment strategies.
Insider:
So what does this mean for broadcasters?
Jacob:
It’s important to understand the limitations of SIP as well as the advantages. So, while
SIP is important from an interoperability perspective, it lacks the ‘secret sauce’ you
get when using two proprietary codecs from the same manufacturer. Codecs from the
same manufacturer will generally connect more easily and offer redundant streaming, IP
bonding, error concealment, and a host of other cool network configuration and monitoring
features.
14 www.tieline.com