Cisco 3825 Hardware Installation Guide - Page 402
Information About the EVM-IPVS-16A Network Module, Video Ports, RS-485 Serial Communication Interfaces
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Information About the EVM-IPVS-16A Network Module Chapter 39 Connecting Cisco Analog Video Gateway Network Modules Information About the EVM-IPVS-16A Network Module • You need a router that supports the EVM-IPVS-16A network module. For a list of supported platforms, see the Cisco Analog Video Gateway Network Module (EVM-IPVS-16A) Data Sheet. Warning Equipment connected to outdoor cameras must be permanently grounded in accordance with national and local codes. Statement 374 Warning Hazardous voltages may be present in the outdoor camera cables under fault conditions. Disconnect all cables from the outdoor cameras before servicing this equipment. Statement 376 Warning This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security. Statement 1017 Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030 Note The compact flash module installed in the EVM-IPVS-16A network module is not field-replaceable. Note For software-related prerequisites and restrictions, see the Configuring the Analog Video Gateway for Integrated Service Routers Cisco IOS feature module. Note For EVM-IPVS-16A network module features and benefits, supported hardware and software, and other product information, see the Cisco Analog Video Gateway Network Module (EVM-IPVS-16A) Data Sheet. Video Ports 16 video ports are provided, video ports 0 and 1 can be configured for input or output. The remaining 14 video ports can be configured for input only. RS-485 Serial Communication Interfaces The EVM-IPVS-16A network module supports a half-duplex, two-wire RS-485 communication network, which sometimes is called a ring. The EIA/TIA RS-485 communications standard supports up to 32 devices (driver/receiver pairs) on a cable of up to 4,000 feet. The EVM-IPVS-16A network module has two RS-485 ports, supporting up to 64 devices. The EVM-IPVS-16A network module typically acts as the master for each of the two RS-485 networks. 39-2 Cisco Network Modules Hardware Installation Guide OL-2485-20