Sienna Cloud for NDI	NDIPE SRT-MPEGTS	SiennaLink Servertor	NDIPE SiennaLink	NDIPE NDI over SRT
Feature
# Channels		unlimited	unlimited	ONE	unlimited	unlimited
Auto Discovery		YES	NO	NO	NO	NO
Centralised Single Point of Config		YES	NO	NO	NO	NO
On Demand Source Selection		YES	NO	NO	NO	NO
Multicam Sync		YES	NO	NO	NO	NO
Remote PTZ Camera Control		YES	NO	NO	NO	YES
Remote Tally		YES	NO	NO	NO	YES
Retain Alpha Channel		YES	NO	NO	NO	YES
GOP Structure Protection		YES*	NO	YES*	YES*	YES
QOS Monitoring		Real Time Stats in Web GUI	SRT Stats	NO	SRT Stats	SRT Stats
Bandwidth Control		YES	YES	YES	YES	NO
Encoding Parameter Control		PRESETS	FULL	PRESETS	PRESETS	N/A
Simple Relay (no transcode)		NO	YES	NO	NO	YES
Port Forwarding		Either Side	Receiver Side	Server Side	Server Side	Either Side
Transport		StreamCertain (Discrete Essence)	SRT (MPEG Transport Stream)	SRT (Discrete Essence)	SRT (Discrete Essence)	SRT (Native NDI Essence)
Codec		H.264	Typically H.264	H.264	H.264	NDI / NDI HX2
Audio		PCM	Typically AAC	PCM	PCM	NDI Native
License		All Nodes	All Nodes	Server Side Only	Server Side Only	All Nodes
Latency		very low	low (very low for simple relay)	very low	very low	very,very low
WAN Protocol Compatibility		Another NDI.Cloud Node	Most SRT Devices (MPEG TS)	SiennaLink Client/RX	SiennaLink Client/RX	Another ND Processing Engine
End Point Compatibility		NDI	Various NDI, MPEG TS, etc	NDI	NDI	NDI
Server Platform		Mac, Linux	MLinux	Mac, Windows, Linux	Linux	Linux
Target		Facilities or OB Van Interconnect	Ad-hoc Wan connection	Remote Edit Monitoring	Remote Monitoring / Video Links	Full Bandwidth Low Latency Links
* GOP Structure Protection : Even when bandwidth is consistently insufficient, the GOP structure will never breakup - it will just drop frames at the source before encoding
Systems from other vendors will break the GOP structure where bandwidth is consistently insufficient, even with reliable protocols like SRT