The Communications Center for the Brunswick County Sheriff’s Office based in Bolivia, North Carolina, serves as the link between the public and emergency services. Operators answer the incoming 911 calls and determine the nature of the situation, entering the information into a computer-aided dispatch system. Then, they check the available resources and assign the closest medical, fire, or law enforcement unit. The operator stays on the line with the caller until help arrives.
AV system failure is not an option for this busy 24/7/365 operations center supporting Brunswick County 911. While the existing AV system was functional, it had a serious drawback. The installation was not designed to provide video throughput redundancy to the operator/dispatcher workstations. Any component failure crashed the system. The solution proved to be a combination of traditional and AVoIP network technology.
The upgraded AV system had to tie together a variety of resources and provide optimal signal integrity, complete reliability, and true redundancy. Additional system requirements included a fail-proof solution to support the multiple monitors and computers at each of the ten 911 workstations, the centralized dispatch system, and the specialized operations equipment, such as the CCOM system, the conduit for phone calls and radio communications.
The many call center sources had to be available for viewing on the Planar Clarity G2 videowall, the operator and supervisor workstations, and within the adjacent conference room. The conference room also required its own presentation system and access to the PTZ cameras throughout the facility. Each room’s system control had to be intuitive and respond instantaneously to selections made simultaneously from multiple endpoints. Another hurdle was timing the transition of each 911 workstation while maintaining the seamless operation of the existing system.
The county officials contacted North Carolina Sound (NCS) to mastermind the upgrade and integrate the new AV system. The installation within the Brunswick County Sheriff’s 911 Communications Center combines an Extron NAV Pro AV over IP system linking the XTP and control systems for a high-performance solution for this life-saving 24/7/365 environment.
The original AV system was based solely on a central processing network system that experienced catastrophic system-wide failure whenever any device or component failed. Although the system could be recovered fairly quickly, down time was unavoidable and unacceptable.
NCS designed and integrated a system configuration based on a combined central switching and point-to-point topology. Unlike the center’s previous AV system, the new design and product selection negated the possibility of the failure of any one device taking down the entire system. This included the rack-mounted components in the server room and the various devices at the nine 911 workstations, the supervisor workstation, the conference room, and the videowall and wall-mounted displays used to augment visibility and monitor evolving situations. The workstations for the rotating skeleton crew were maintained during each functional switch-over.
Extron’s XTP system serves as the AV switching and distribution system for the room’s displays, with DTP transmitters and receivers facilitating signal extension within the call center. In the conference room, XTP transmitters and scaling receivers provide signal extension from connected devices to the room’s displays. An Extron NAV system also links 911 call center resources with the conference room and backup emergency operations center (EOC).
The server room with the rack-mounted AV equipment doubles as the control room. An Extron 17” Tabletop TouchLink Pro Touchpanel provides full system control from this central location. TouchLink Pro touchpanels facilitate local system control at the workstations and the conference room table. In the server room is an Extron XTP II CrossPoint 32×32 modular matrix switcher populated with XTP I/O boards, supporting high-performance switching and local distribution of 4K/60 HDMI and stereo audio signals. The rack-mounted computers, CCOM system, and Apple TVs are connected directly to the matrix switcher over HDMI. The XTP II CrossPoint routes source signals and camera feeds to the videowall and among the workstation consoles. Signals are also available in the conference room and at certain displays within the facility.
Each 911 workstation includes four consoles, one each for the radio system, the phone system, a CAD PC, and a browser PC. The individual consoles have DisplayPort outputs, with the CAD console having four outputs to support a variety of specialized 911 functions. These signals are converted to HDMI for ingestion into the AV system and delivery to the HDMI display devices.
Extron DTP Series transmitters send DisplayPort and HDMI source signals from each 911 workstation to DTP receivers mounted with that workstation’s touch screens and monitors. USB transmitters and receivers facilitate data extension.
This design is duplicated at each of the nine 911 workstations. The supervisor workstation has these same capabilities and includes Extron audio amplifiers and a 4K TouchLink interface used to augment operation of the 23.8” touch screens.
The conference room within the communications center is used for a variety of staff and management meetings and serves as a backup EOC. The displays in the room include a professional-grade projection system and three 55” 4K LCD panels mounted on the walls. Content can be sourced from devices connected at the conference table or around the room, accessed through the facility’s auto-tracking PTZ videoconferencing cameras, and pulled from the same resources available at the 911 supervisor workstation.
Eight XTP three-input switchers and pairs of USB extenders enable delivery of video signals and USB data to the rack-mounted matrix switcher. Each switching transmitter is configured to automatically switch among the three inputs based on the active signal. For personal source devices, Extron Cable Cubby enclosures offer AV connectivity through the table. AV transmission distances are well within the 330foot (100meter) range of the switcher’s builtin XTP transmitter.
An Extron XTP scaling receiver is mounted with the projector and behind each of the displays. This receiver accepts video with or without embedded audio, bidirectional RS232, and Ethernet over XTP and scales the video to the display’s native resolution. Monitors such as the display on the mobile cart receive signals from an Extron six-output 4K/60 HDMI distribution amplifier to ensure additional visibility during a high-profile emergency operation or a county-wide crisis.
An Extron 17” tabletop TouchLink Pro touchpanel is installed at one end of the conference table for content selection and AV system control. It is connected to the server room’s IP Link Pro xi control processor over the NAV Pro AVoIP system.
An Extron NAV professional AV over IP system links the control room, the various workstation resources, and the conference room over the facility’s network. NAV 1G encoders also link the conference room PC, Cisco Catalyst switch, and BrightSign system to the XTP II CrossPoint matrix switcher.
A NAV 1G scaling decoder supports the sixth Lenovo 27” display at each 911 workstation, enabling display of HDMI content from other sources connected to the NAV AVoIP switching system. The same NAV scaling decoder model is used in the conference room and mounted with the Sony 65” 4K HDR LED LCD display on each mobile cart. The NAV system also ties in the CCOM phone and radio system for presentation control on any combination of display devices throughout the facility.
A NAVigator Pro AV over IP System Manager allows for monitoring, management, backup, and recovery of all NAV Pro AVoIP endpoints.
