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| OTHER SUPPLIERS |
| | Signal Beach Software Inc. | | Specializes in Software Solutions | | |
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| | Sigtronics Corporation | | Specializes in Emergency Apparatus and Aviation Communications | | |
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| | Silent Knight | | Specializes in Fire Protection Solutions | | |
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| | Simulcast Solutions ®,LLC | | Specializes In All Aspects of a Specific Land Mobile Radio Application | | |
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| | Sioux Merchant Patrol | | Providers of Security Services | | |
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| | Skypilot Networks, Inc. | | Leading Provider of Carrier-Class Wireless Mesh Solutions | | |
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| | Skytel Corp. | | Specializes In Wireless Data and Messaging Services, Wireless Email, Interactive Two-Way Messaging, and Wireless Telemetry Services | | |
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| | Smartronix, Inc. | | Specializes in Application Integration, Development, and Business Management Services | | |
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| | Southern Equipment Add On Inc. | | Specializes in Computer Peripherals and Data Communications | | |
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| | Special Response Corporation | | Leader in Providing Highly Specialized Security Services in Times of Crisis or Heightened Vulnerability | | |
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| | Spectrum Integrated Technologies | | Specializes in Advanced Solutions in Security, Network Cabling, Telephony, And Other Low Voltage Systems | | |
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| | Spotwave Wireless Inc. | | Specializes in Carrier-Approved, Indoor Wireless Coverage Solutions | | |
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| | Sprint Nextel | | Specializes In a Range of Communications Services | | |
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| | Square Peg Communications Inc. | | Specializes In the Development and Manufacture of State Of The Art Dsp-Based Mobile and Airborne Satellite Communications Products | | |
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| | SRA International, Inc. | | Leading Provider of Technology and Strategic Consulting Services and Solutions | | |
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| | SS Systems Limited | | Specialists in Wireless Alarm System Specialists | | |
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| | Stancil Corporation | | Specializes In the Design and Manufacture of Voice Logging Recorders | | |
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| | Starside Security & Investigation | | Providers of Professional Security, Investigative and Employment Services | | |
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| | Storacall Voice Systems Ltd. | | Specialists in Call Handling and Related Services | | |
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| | Streem Communications Inc. | | Specializes In Streem Alert® Notification System | | |
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