 Interoperability Made Simple
TESSCO offers cost-effective interoperability solutions to public safety communications with the speed and simplicity of deployment that is essential in any emergency.  Product Categories
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Product BrandsGAI-Tronics | Raytheon | STI-CO
Interoperability FeaturesEliminate Leased Lines Using RoIPVoice-grade leased lines are regularly used in public safety land mobile radios systems as dedicated baseband communication links between two remote points. Leased lines are also known as tie lines, wireline, dedicated line, private line, Bell 3002, among many others. This symmetric telecommunications link, consisting of a two-wire or four-wire path, can tie a dispatch console to a base station, for example, or provide connectivity between radios or drop repeaters separated by many miles. Unlike dial-up, voice-grade, switched-circuit PSTN telephone lines, these leased lines provide 24-hour, full-period connectivity, and reliability by detouring traditional switch circuits at the telephone central office (CO). However, there is a price to pay for these features and reliability. In most cases, voice-grade leased lines can be very costly, especially if they are crossing state boundary lines and they are installed and managed by telephone companies, up to the demarcation point of the end users’ premises. As the end user, you select the quality or grade of the dedicated line, and the method at which each terminal end point interfaces to the radio system. Advantages of Lease Lines - 1:1 bandwidth ratio guarantee.
- 100% unshared access to stated capacity.
- Unambiguous link is relatively secure.
Disadvantages of Lease Lines - Recurring monthly costs are based upon distance between each terminus. Cost is nearly proportional to distance. Cost figures can range from $400 to $1,500 per month per line.
- User must purchase and manage termination equipment between the telephone company’s demarcation and the private user’s radio system.
- User must pay for service even during low-capacity demands.
- Some telephone service providers are reducing the availability of voice-grade lines, and concentrating on the deployment of digital-grade leased-lines (T-Class, ISDN, among others).
- Inflexible link, cannot easily link to different or redundant end point.
Take your remote connection from a Leased-Line Link 
To a TCP/IP Network Link 
These diagrams represent a typical leased line dedicated link between a dispatch console and a remote base station, except (2) NXU-2A Network Extension Units linked together using an existing TCP/IP network are used at each endpoint to support the dispatch console and the base station, thus eliminating the leased line.
Raytheon JPS Network Extention Unit with RoIP Technology Voice-grade leased lines can be circumvented by transporting digitized baseband audio from land-mobile radio systems over existing TCP/IP networks supported by Raytheon JPS NXU-2A network extension units.
The JPS Communications NXU-2A network extension unit is a standalone device that interfaces full-duplex baseband audio, one RS-232 port, and four status bits onto a TCP/IP Ethernet network. The NXU-2A uses Radio over Internet Protocol (RoIP) to convert land mobile radio baseband audio to datagram, which can then be routed over an existing digital network. The NXU-2A can also address the essential control signals used by land mobile radio systems. These control signals consist of the COR signal generated by a device when it is receiving a radio transmission, and the PTT signal which requests a device to begin a radio transmission. VoIP alone cannot handle these control signals, and that is why RoIP, used by JPS Communications, is essential to providing compatibility to land mobile radio systems. Two NXU-2As can be associated across a TCP/IP network by assigning one NXU-2A as a server, and the other NXU-2A as a client.
Affordable & Quickly Deployable InteroperabilityInteroperability for Emergencies—or Every Day Emergency interoperability is all about incident preparedness, situation management, and system reliability. But when you're in the field, in a crisis, what you care most about is speed and simplicity. The answer is the Raytheon ACU-M. The versatile ACU-M is feature rich, simple to use and can be networked and managed remotely. Its intuitive interface enables sure operation and provides field diagnostics and programming capabilities. The ACU-M can connect up to audio devices, 2 VoIP channels (with Network Option), and the local operator.
 Interoperability Accessories:
Cables for Your ACU Products
TESSCO offers the full line of interface cables for the Raytheon JPS ACU-M, ACU-T, ACU-1000, and ACU-2000.  View All Interoperability & RoIP Cables
Mobile Command Vehicle When an incident occurs, many agencies roll out their Mobile Command Vehicles. TESSCO can help you outfit and maintain your MCV. With a wide array of mobile antennas, dispatch consoles, interoperability units, mobile power products, installation supplies, batteries and battery chargers, TESSCO is your source.
Interoperability Antennas The need to maintain urgent communications between emergency responders at local, state and federal levels has been proven time and again. The STI-CO Interoperable Antennas complement gateway transmission systems during critical incidences, enabling first responders to communicate seamlessly using VHF, UHF, and 700/800 MHz transmission devices. With only one antenna to mount on a rooftop, tower, or command vehicle, command posts are set up and operating quickly.
Emergency Rooms Linked Statewide The Illinois Terrorism Task Force (ITTF) Communications Committee is orchestrating a project to provide a common RF communications link between hospital emergency department in the state.
The Illinois Hospital Radio System allows the flexibility of local/regional communications as well as the ability to commonly  link the state during times of extreme emergency. A GAI-Tronics Model ICP9004A, four-channel, desktop console for each hospital location was selected and purchased through TESSCO's GSA schedule. Each hospital was also provided with a conventional radio base station. The terrorism task force will give hospitals two frequencies for common operation during emergencies outside the parameters of normal daily operations. One frequency will be used for communications between hospitals in a common region. The other frequency will provide communications with ambulances that might arrive from any region in the state. Each hospital will add local or daily operation frequencies and will secure the services of local radio dealers for equipment installation.
Radio over IP  The Raytheon NXU-2A connects communications equipment to a digital network using RoIP (Radio over Internet Protocol) technology. It is intended for use with radio communications consoles, communications radios, and products such as the ACU-1000 and the SNV-12 Voter. The NXU-2A is a general-purpose standalone device that interfaces full duplex audio, one RS-232 port, and four status bits onto an Ethernet network. A pair of NXU-2As can form a simple system that creates a transparent communications link between the two.
Interoperability White Papers from RaytheonGet all the details you need! Raytheon has supplied a series of white papers to help you as you build your system. Topics include ACU-M Mission Critical Interoperability, NXU-2 RoIP Link to Eliminate Voice-Grade Leased Line, NXU to Help Migrate to New Radio System, and RoIP Versus VoIP Solutions. NXU-2 RoIP Link to Eliminate Voice-Grade Leased Line (137 KB) NXU to Help Migrate to New Radio System (73 KB) RoIP Versus VoIP Solutions (219 KB)
 For more information contact TESSCO
at 888-256-9220.
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