When using the AT-OMNI-311 with AT-OMNI-324 devices through a peer-to-peer (P2P) HDBT system, the number of extra devices (AT-OMNI-324 hubs) that can be enumerated simultaneously is limited to three.
Note that matrix units with HDBT inputs may behave differently, and this article is mainly about the AT-OME-EX-TX(-WP) and AT-OME-EX-RX, or AT-OME-SW21-TX-WPC and AT-OME-EX-RX.
Understanding the Limitation
- The AT-OMNI-311 and AT-OMNI-324 devices support up to seven connections when used directly.
- The limitation to 3 devices comes from the peer-to-peer HDBT system's USB hub capabilities.
- When connected through the HDBT system, only the first three AT-OMNI-324 devices to complete enumeration will be functional.
- Additional AT-OMNI-324 devices beyond the first three will pair but remain non-functional
Practical Implications
- In multi-room peer-to-peer HDBT setups, customers must carefully plan which three AT-OMNI-324 devices will be active.
Connection Behavior
- Devices are enumerated in the order in which they are connected through the HDBT system.
Example of a split room using too many AT-OMNI-324 devices
Problem
When the room is combined and a single source/host is selected, potentially qty. 6 AT-OMNI-324 are present (qty. 4 cameras and qty. 2 DSPs).
Solution
Care must be taken during programming to ensure that when combined, only a single DSP and single front/rear camera pair are paired to the AT-OMNI-311 so that the selected source/host is connected to it. This would result in qty. 3 AT-OMNI-324 being paired to that source/host at a time.
Article ID: KB-HDBT-USB-001