UNItivity Wideband DAS
The Hub is extremely flexible, as it can be used as either a Primary or Secondary Hub. When configured as a Primary, the Hub provides the interface to the RF source and converts RF signals to optical and connects via fiber to either additional Hubs (when configured as Secondary Hubs) or UNItivity Remotes (in the case of a single star configuration).
Acting as a Primary, the Hub features a unique internal service distribution matrix which provides flexibility in terms of how supported wireless services are routed within a system deployment. This means specific operators or frequencies can be routed to the entire system or to designated sections of the system, depending on requirements.
Acting as a Secondary, the Hub input is an optical link from a Primary Hub, and the Secondary Hub then supports fiber connections to up to 8 Remotes. As such, a UNItivity system can range from a single Primary Hub and Remote (a 1-1 configuration) to a maximum configuration consisting of a Primary Hub, 8 associated Secondary Hubs, and 64 Remotes (a 1-8-64).
The Hub is completely modular, as it can support up to 4 Service Modules for interfacing to the RF source(s) and up to 8 Optical Modules for interfacing to either Secondary Hubs or Remotes.
Service Modules (up to 4 of which can be deployed in the back of a single Primary Hub) provide the interface to the RF signal source i.e. BDA, BTS, small cell, etc. The modules are hot swappable units, allowing either system maintenance or the addition of operators or frequencies to be done without disrupting service.
The Optical Module has two functions. Firstly, if a Hub is configured as a Secondary, the Optical Module is used to support the fiber link from the Primary Hub to the Secondary Hub (in this instance, the Optical Module is deployed in one of the slots normally occupied by a Service Module). Secondly, the Optical Module is used to support fiber links from the Hub (either Primary or Secondary) to the Remotes. Up to 8 Optical Modules can be deployed in the Hub for this purpose, and they are hot swappable units to allow for system maintenance or adding additional Remotes with no impact to service.
The Remote Unit, which is connected to the Primary or Secondary hub via fiber (SMF or MMF), is typically mounted above ceiling tiles or in out-of-sight locations as close as possible to the service area. It converts the wireless signal from optical to RF (or vice versa) and amplifies it for transmission to or from a mobile device. Like the rest of the system, the remote is a wideband unit capable of supporting all frequencies from 150MHz to 2700MHz in any combination.