1. Praesideo Cobranet Interface
LBB4404/00

2. What is Cobranet?
Developed by Peak Audio, CobraNet™ is the industry's leading technology for distributing uncompressed real-time digital audio over a Fast Ethernet network.
Advantages:
Use of “standard” multi-vendor network (ethernet) and protocol (cobranet)
Complies to structured cabling principles using Cat5 and GOF
Long line transmission using GOF
Provides open audio interface to mix with other Cobranet products and systems

3. What is Cobranet? Cobranet technology Isochronous data transmission
No retransmissions (real-time audio)

4. Praesideo Cobranet Interface
Links 4 Praesideo audio input channels and 4 Praesideo audio output channels to Cobranet
Functionality is similar as a Praesideo Audio Expander
NCO 1
Cobranet Interface
NCO 2
Cobranet interface
4 + 4 digital channels
NCO 1
Audio Expander
NCO 2
Audio Expander
4 analog channels
4 analog channels

5. Praesideo Cobranet Interface
19”-Praesideo cabinet
2 Ethernet connections (Cobranet)
Redundant ethernet connection
2 MOST system network connections (Praesideo)
VU meter reading on display
8 control inputs
5 control outputs
1 headphone output

6. Praesideo Cobranet Interface
Cobranet specifications
48 kHz sample rate
16,20 and 24 bits resolution
5.33 latency mode

7. Praesideo Cobranet Interface
Cobranet is using a fixed peer to peer or multicast routing after configuration
Audio routing is configured via dedicated PC configuration tools and the Cobranet routing is fixed afterwards
Praesideo routing to a Cobranet Interface is still dynamic

8. Praesideo Cobranet Interface
No control functions are transferred via Cobranet
Praesideo Open Interface is needed for control functions via Ethernet (TCP/IP), using a separate Ethernet switch
Control is only to a Praesideo NCO, not by the NCO
The NCO is an Open Interface slave and a PC Call station can be the master (for multiple slaves)

9. Cobranet network A good Ethernet network is essential for Cobranet
Todays Ethernet variations
10 Mbps Ethernet (not suitable for Cobranet)
100 Mbps Fast Ethernet
1000 Mbps Gigabit Ethernet
Use (managed) switches no hubs
Hubs
half-duplex
100Mbps network-wide
data exits all ports regardless of address
Switches
full-duplex
100Mbps in each direction
intelligent forwarding
Switch gives more freedom in network design

10. Cobranet network
Spanning Tree Protocol

11. Cobranet network
Spanning Tree Protocol

12. X Cobranet network Spanning Tree Protocol
node
Spanning Tree Protocol
switch
node
switch
switch
node
node
switch
switch
node X
switch
STP disables a link to prevent the ring condition
node

13. X Cobranet network Spanning Tree Protocol If a link is broken...
node
Spanning Tree Protocol
switch
node
switch
switch
node X
If a link is broken...
node
switch
switch
node
STP disabled link
switch
node

14. X Cobranet network Spanning Tree Protocol Broken link...
node
Spanning Tree Protocol
switch
node
switch
switch
node X
Broken link...
node
switch
switch
node
switch
STP re-enables the link to route around the failure
node

15. Cobranet network
Trunking

16. Cobranet network
Distances all depends on Ethernet limitations and good network design and used equipment like switches and cabling
CAT5 cabling
Unshielded twisted pair
Fast Ethernet distance limitation is max 100 meter
Multimode glass fiber
Multiple paths through the fiber
Fast Ethernet (100Base-FX) distance limitation is max 2000 meter
62.5μm Core
125μm Cladding

17. Cobranet network
Distances all depends on good Ethernet network design and used equipment like switches and cabling
Single mode glass fiber
Single path through the fiber
No Ethernet standard for Single mode fiber
8/125μm is typical
Distance limitation depending on on used equipment like switches

18. Praesideo / Cobranet System Architecture
Ethernet
Ethernet
Ethernet
NCO
NCO
NCO
63 nodes
63 nodes
63 nodes
Ethernet
Ethernet
Ethernet
Cobranet interface
Cobranet interface
Cobranet interface
Ethernet Switch
Ethernet Switch
Ethernet Switch
Ethernet over glass fibre or CAT5

19. Praesideo / Cobranet System Architecture
NCO
Cobranet interface
63 nodes
Ethernet Switch
Ethernet over glass fibre or CAT5
Ethernet
Max. 5 PC CST per ring

20. Praesideo / Cobranet System Architecture
Design rules
Don’t exceed ethernet available bandwidth
Be conservative
No more than 16 bundles over a 100Mbps link
64 channels total over a half-duplex link
64 channels each direction over a full-duplex link
Don’t exceed distance limitations
Max 7 switch hops
No loops without Spanning Tree or Meshing capable switches
Observe hop limitations

21. Cobranet information
Bosch Extranet soon updated with Cobranet information
Peak Audio / Cirrus Logic Website
Pro Sound web, Cobranet forum

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property rights. We reserve all rights of disposal such as copying and passing
on to third parties.