Compact Outdoor Node Model 90275
The Compact Model 90275 node has been specially designed for outdoor use and surge
protection is provided for all input and output ports. The flexible Model 90275 “two-in-one” node can serve as a trunk or distribution node to feed architectures of various densities and addresses divergent system needs. Available with two high level RF output ports, it is ideal for delivering video as well as high-speed data services over advanced hybrid fiber coax (HFC) networks. Its modular design allows for segmentation in the reverse path and independent redundancy for both the forward and reverse path in a reliable, cost-effective package.
Forward redundancy can be implemented via use of a second optical receiver module. The node’s reverse path is equally flexible and FP, DFB and CWDM opticaltransmitters are available. The node provides for reverse segmentation through the addition of a second transmitter and each transmitter is dedicated to the reverse traffic from the two individual node outputs. Alternatively the second transmitter can be used in a redundant configuration to help ensure continued service in the event of transmitter failure.
The unit’s high output level range makes it ideally suited for system upgrades to help operators push fiber deeper into the network to increase bandwidth in support of interactive applications. The node can serve at different output levels and multiple node sizes in an HFC-network and can be connected directly to the subscriber’s tap network. The dual outputs with enhanced intermodulation performance and flatness enables operators to cascade more amplifiers at the end of the system. The node features a microprocessor controlled output level control. This ensures an output level that isindependent of changing optical input levels e.g., by redundant switching, additional fiber splices, and other fiber handling that affects the optical attenuation.
Unlike conventional designs, this automatic gain control (AGC) operates without pilot tones. The node shares common plug-in accessories with othernodes and amplifiers in the Compact family, and utilizes PG11 RF ports or 5/8″ using provided adapters. A directional coupler RF test point is provided at the forward output and reverse transmitter, allowing for accurate signal level measurement. Surge protection is provided for the RF ports, and the node is equipped with a double gasket that includes an RF and a water-dust gasket. All Compact nodes can be configured with a Scientific Atlanta status monitoring transponder to enable remote monitoring of critical node parameters and remote control of the built-in 3-state reverse switch. By switching to detection mode (-6 dB) it can be observed from which part of the network the ingress derives. Once a failure has been located, the defective network segment may be isolated until the failure has been eliminated and the remaining part of the reverse path is ensured normal traffic.
- 862 MHz node optimized for trunk or distribution applications to feed architectures of various densities
- Extended output level range
- GaAs-FET technology for superior performance
- Full two-way communication
- Remarkable CTB/CSO values
- Redundancy for the forward and/or reverse path
- Segmentation of upstream signals with two (2) transmitters
- Optional status monitoring and control
©2006 Cisco Systems, All rights reserved