Design Guide – DOC. 7977F DM NVX System • 33
Case Study 3: 4K AV Distribution over Fiber
A client requires 4K AV distribution of 563 sources that are co-located at the MDF for
10 different locations on a campus up to 0.8 km (0.5 mi) from the MDF. Each location
contains 18 separate displays and four 2 x 2 video walls across multiple rooms. The client
needs to use a fiber-optic network for all video distribution. All device logins must be tied
to the campus Active Directory, DHCP, and 802.1X services for policy reasons.
Core redundancy is required to minimize campus-wide disruptions. Users must be
able to switch between sources at any display independently.
Solution:
• The Crestron design is based on the use of DM-NVX-350 endpoints as
encoders and decoders, a fiber-optic network across a large MDF, and
the DM-NVX-DIR-ENT:
- Endpoints consist of 563 DM-NVX-350 encoders at the MDF,
180 DM-NVX-350 decoders for the rooms, and 40 DM-NVX-350 decoders for
the 2 x 2 video walls in the 10 locations (4 decoders for each location).
- Single-mode 1310 nm/1490 nm fiber is used. The network switches are
configured using SFP 1G BX downlink modules, and the DM-NVX-350
encoders and decoders use SFP-1G-BX-U uplink modules for fiber
connections.
- A DM-NVX-DIR-ENT allows fiber to be used for the DM NVX system.
The DM-NVX-DIR-ENT is used to set up, control, and monitor the
DM NVX system.
• A Crestron PRO3 control processor is used in each of the 10 locations.
• A TSW-760 touch screen is used in each of the 18 rooms across 10 locations,
totaling 180 touch screens. In addition, a TSW-760 touch screen is used for each
video wall room in the 10 locations, totaling 10 touch screens that provide user
control of the entire system. Each touch screen is powered by a Crestron
PWE-4803RU PoE injector.
• A tree architecture requires a minimum core switch bandwidth of 252 Gbps for
563 encoders and 252 (180 + 72) decoders. The existing core switch is capable of
1 Tbps and will be reused and reconfigured for 1 Tbps as required.
• Each of the 10 locations requires 22 DM-NVX-350 decoders to provide a
nonblocking switch with at least 22 free ports.
• The network switches are configured to route the campus RADIUS server for
802.1X, the campus Active Directory server for login authentication at each
endpoint, the campus DNS server for name assignment, and the campus DHCP
server for IP assignment and MAC filtering; similarly, the endpoints are
configured to utilize these services.
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