Data Radios

Freewave radios are designed for seamless integration into networks that require reliable link performance and support low power, long range machine-to-machine communications. Freewave radios transfer data in noisy, challenging environments covering over 60+ mile distances. By utilizing Frequency Hopping Spread Spectrum (FHSS) technology, Freewave provides an alternative to expensive Wi-Fi bandwidth, cellular or fiber.

GE’s MDS is an end-to-end industrial wireless communication provider which carries serial and IP/Ethernet traffic, as well as analog and digital I/O signals connected to field sensors and devices, accommodating an extensive variety of industrial protocols. GE’s MDS wireless radios have been rated and tested to harsh specifications and operate over licensed and unlicensed narrowband communication in a variety of frequencies.

Phoenix Contact radios are available as licensed, unlicensed, cellular and I/O radios that work with either 12 VDC or 24 VDC power sources. They have options for point-to-point and point-to-multipoint setups. Phoenix industrial wireless solutions include models with 400 MHz, 900 MHz, or 2.4 GHz frequencies. The Phoenix 2.4 GHz ethernet radios have a range of 10 miles (16 km) and the Phoenix I/O radios have a range of 5 miles (8 km) and offer a 500 Kbps data rate. 

Phoenix Contact Radioline wireless radios are ideal for large systems. The Radioline system transmits data and signals over several kilometers with devices available with a wide range of frequencies. Radioline transmits IO signals as well as serial data and is therefore very versatile. Data transmission is reliable and secure utilizing frequency hopping spread spectrum (FHSS) and encryption according to advanced encryption standard (AES).

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$836.40
Freewave ZIQ-P-WL ZumIQ Edge Computer, Board-Level, 1GHz processor, 512MB RAM, 1Eth port, 2 Serial ports, White Label (FreeWave branding removed)
$1005.60
Freewave ZIQ-PE2 ZumIQ Edge Computer, Enclosed, 1GHz processor, 1GB RAM, 2Eth port, 2 Serial ports
$772.80
Freewave ZIQ-PE ZumIQ Edge Computer, Enclosed, 1GHz processor, 512MB RAM, 1Eth port, 2 Serial ports
$1083.60
Freewave ZIQ-P2-WL ZumIQ Edge Computer, Board-Level, 1GHz processor, 1GB RAM, 2Eth port, 2 Serial ports, White Label (FreeWave branding removed)
$940.80
Freewave ZIQ-P2 ZumIQ Edge Computer, Board-Level, 1GHz processor, 1GB RAM, 2Eth port, 2 Serial ports
$706.80
Freewave ZIQ-P ZumIQ Edge Computer, Board-Level, 1GHz processor, 512MB RAM, 1Eth port, 2 Serial ports
$1551.60
Freewave Z9-IO-PE-ZE ZumLink 900 IO Enclosed Ethernet Snap-to-Stack Capable ZumEdge
$1200.00
Freewave LRS455A-T 435-470 MHz 19.2 Kbps Over the Air Data Rate Licensed Band Radio Board level 6-27 volts TTL Straight SMA Female RF connector Class I Div 2.
$1492.80
Freewave LRS455A-CE 435-470 MHz 19.2 Kbps Over the Air Data Rate Licensed Band Radio in ruggedized enclosure 6-30 volts RS232 / RS485 TNC connector.
$1200.00
Freewave LRS455A-C 435-470 MHz 19.2 Kbps Over the Air Data Rate Licensed Band Radio board level 6-30 volts RS232 / RS485 Straight SMA Female RF connector.
$1507.20
Freewave I2-IOS-C-U-SR010 Board Level 2.4 - 2.483 GHz 115.2 Kbps Over-the-Air 20 Miles FHSS / Frequency Hopping Spread Spectrum 10-Pin Header 6-30V Right Angle SMA RS232 / RS485 Optional AES IO Slave, UL, C1D2
$1071.60
Freewave GX-T 2.4 GHz, 153.6K Over the Air Data Rate, Spread Spectrum wireless data transceiver, 6-30 volts, TTL, SMA.
$1128.00
Freewave GX-C-SR002 2.4 GHz, 153.6K Over the Air Data Rate, Spread Spectrum wireless data transceiver, 6-30 volts, RS232/RS485 switchable interface, SMA. w/ Non-Shrouded Data Conn
$1492.80
Freewave GX-CE 2.4 GHz, 153.6K Over the Air Data Rate, Spread Spectrum wireless data transceiver in a ruggedized enclosure, 6-30 volts, RS232/RS485 switchable interface, TNC connector
$1128.00
Freewave GX-C 2.4 GHz, 153.6K Over the Air Data Rate, Spread Spectrum wireless data transceiver, 6-30 volts, RS232/RS485 switchable interface, SMA.
$1575.60
Freewave FUSION-BR-WZ FreeWave Fusion Bridge with Wifi and Z9 radios
$771.60
Freewave FGRSR-CSU 902-928 MHz, 115.2K Over the Air Data Rate, Short Range Spread Spectrum board level transceiver, 100mW Output, RS232/RS485, 6-20 volts, with Straight SMA Female RF Connector, Class I Div 2 classification.
$1128.00
Freewave FGR2-C-U 902-928 MHz, 115.2K Over the Air Data Rate, Spread Spectrum transceiver, RS232 / RS485, Board Level, Straight SMA Female RF Connector, with Straight Top 10-Pin Locking connector, 6-30 Volts, Class I, Div II.
$1492.80
Freewave FGR2-CE-U 902-928 MHz, 115K Over the Air Data Rate, Spread Spectrum wireless data transceiver in ruggedized enclosure, 6-30 volts with RS232 / RS485 switchable interface, TNC Connector, Class I, Div II.
$1860.00
ZumLink Z9-PE (4 port), 900 MHz, Enclosed Product (Grey enclosure), TNC. Hardware Only, White-Label (FreeWave branding removed except on top enclosure)
$1860.00
ZumLink Z9-PE (4 port), 900 MHz, Enclosed Product, TNC. Hardware Only, White-Label (FreeWave branding removed except on top enclosure)
$1557.60
ZumLink Z9-PE, 900 MHz, Enclosed Product, TNC. Hardware Only, White-Label (FreeWave branding removed except on top enclosure)
$1369.20
ZumLink Z9-P (4 port), 900 MHz, Board Level Product, SMA. Harware Only, White-Label (FreeWave branding removed)
$1269.60
ZumLink Z9-P, 900 MHz, Board Level Product, SMA. Harware Only, White-Label (FreeWave branding removed)
$1810.80
ZumLink Z9-PE (4 port), 900 MHz, Enclosed Product (Grey enclosure), TNC. Hardware Only
$1810.80
ZumLink Z9-PE (4 port), 900 MHz, Enclosed Product, TNC. Hardware Only
$1492.80
ZumLink Z9-PE, 900 MHz, Enclosed Product, TNC. Hardware Only
$1226.40
ZumLink Z9-P (4 port), 900 MHz, Board Level Product, SMA. Harware Only
$1128.00
ZumLink Z9-P, 900 MHz, Board Level Product, SMA. Harware Only Frequency Range 902 to 928 MHz, Output Power*10 mW to 1 W; user selectable, Range 97 km (60 miles) with clear line of sight,
$1128.00
FreeWave FGR3-C-U 902-928 MHz Serial(Non-Licensed) Board Level Radio (UL approved). 6 to 30 VDC with data rates up to 115.2 Kbps and 153 Kbps. Store and foreward capable. 60 mile range. Sensitivity of -108 dBm for BER 1x10-6 , -110 dBm for BER 1x10-4. Operating temp -40 F to +167 F. Din Rail Mount sold separately. Selectable Speeds: 115.2 Kbps & 153.6 Kbps. Backward compatible with the FGR & DGR Series of Freewave Technologiess. High Noise Immunity: Provides superior performance in noise congested environments. Unparalleled Signal Performance: GaAs FET RF front end with multistage SAW filtering has unmatched combination of overload immunity and sensitivity. FreeWave Technologies, Inc’s FGR3 radio is the next generation of the FGR Series that has the same proven performance, reliability and quality that our customers have come to know and expect in all of our products. The FGR3 is a cost effective solution that allows customers to incorporate wireless communications into a wide variety of applications.
$1492.80
FreeWave FGR3-CE-U 902-928 MHz Serial(Non-Licensed) Enclosed Radio (UL approved). 6 to 30 VDC with data rates up to 115.2 Kbps and 153 Kbps. Store and foreward capable. 60 mile range. Sensitivity of -108 dBm for BER 1x10-6 , -110 dBm for BER 1x10-4. Operating temp -40 F to +167 F. Din Rail Mount sold separately. Selectable Speeds: 115.2 Kbps & 153.6 Kbps. Backward compatible with the FGR & DGR Series of Freewave Technologiess. High Noise Immunity: Provides superior performance in noise congested environments. Unparalleled Signal Performance: GaAs FET RF front end with multistage SAW filtering has unmatched combination of overload immunity and sensitivity. UL Class 1, Division 2. FreeWave Technologies, Inc’s FGR3 radio is the next generation of the FGR Series that has the same proven performance, reliability and quality that our customers have come to know and expect in all of our products. The FGR3 is a cost effective solution that allows customers to incorporate wireless communications into a wide variety of applications.
$1218.72
MDS Orbit ECR Cellular 4G LTE Verizon with standarad mount and WiFi. ECR4G51W51NS1D2USUNNN Managed Connected Router MCR Series. Includes 2 Ethernet and 1 Serial port. Operating power of 10-60 VDC up to 1 watt. USB for configuration, status monitoring, local and secure single point connection. Range of up to 30 miles line of site. Low latency and scalable data throughput rates of 125 Kbps, 250 Kbps, 500 Kbps, 1 Mbps, and 1.25 Mbps. Access Point, remote, store and forward, point to multipoint and point to point. Works as Serial Terminal Server with protocols including Modbus and DNPv3 supported and serial traffic from SCADA and telemetry data encapsulated in TCP and UDP to transport across MDS Orbit wireless or wired networks. The MDS Orbit devices are capable of routing across any of its network interfaces including the local Ethernet ports, WiFi, WiMAX, cellular, and 900MHz ISM. Operating temperature of -40F-158F. (2.1"H x 4.3"W x 4.6"D) Antenna ports for 900 MHz: TNC, WiFi: RP-SMA, Cellular SMA. Ethernet ports: RJ-45, Serial ports: RS-232/RS-485 and RJ45.
$619.71
Phoenix Contact RAD-RS485-IFS Radioline RS-485 multipoint Multiplexer for I/O signals. Up to 99 stations, range up to 1.2 km. Can be combined with Radioline wireless system or used a Modbus RTU coupler.
$1505.93
Phoenix Contact 2702877 Radioline 900 MHz IO Radio
$2656.88
Phoenix Contact 2901205 Radio 900 MHz Ethernet Radio
$11589.39
MDS MPRU-R-W Unlicensed Orbit Master Station Redundant radios (902-928 MHz) with WiFi (2.4 GHz) dual redundant power supplies.
$11467.39
MDS MPRU-R Unlicensed Orbit Master Station Redundant radios (902-928 MHz) with dual redundant power supplies.
$8539.55
MDS MPRU-N-W Unlicensed Orbit Master Station Non-Redundant radios (902-928 MHz) with WiFi (2.4 GHz) dual redundant power supplies.
$8417.55
MDS MPRU-N Unlicensed Orbit Master Station Non-Redundant radios (902-928 MHz) with dual redundant power supplies.
$1890.90
MDS SD9 ES H Band (850-860)(926-936) MHz TX High (Din Rail Mount) SD09-MDHESNADNN Licensed Managed Serial Licensed Radio. 1 Ethernet data port and 2 Serial data ports with 1 port 9710 Emulation (Ethernet AES-128 Encryption) 5 watt, 10v-30vdc with data rates to 19.2 Kbps at max range of 50 miles, sensitivity of -112 at 1x10-6 BER. with 1 Active Ethernet Port and 2 Active Serial Ports. High speed, up to 65 Kbps in 50 KHz channel. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 9710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. Temperature range of -140 to 158 degrees fahrenheit. With bands of A 820-870 MHz TX High, B 928-960 MHz TX High, C 450-512 MHz TX High, D (850-860)(926-936) MHz TX High. The MDS SD Series are industrial wireless solutions that provide long distance communications over licensed radio bands, allowing users to interface to both Ethernet and serial devices such PLCs, RTUs and meters with host monitoring and control systems. The SD’s Media Access Control (MAC) is optimized to reduce Ethernet overhead and preserve bandwidth for higher usable data speed. The IP Payload feature removes unneeded Ethernet frames to shrink messages and improve throughput. MDS SD Series radios can be directly added to existing MDS x710 and x790 systems, providing both "drop-in" compatibility for expansions and replacements, and adding Ethernet support.
$1921.70
MDS 9710 Radio Refurished MDS 9710A licensed 900MHz (800-960MHz) Serial Radio (12.5 KHz bandwidth for New System) 10.5-16vdc with data rates up to 9.6 Kbps. Max range of 50 miles and sensitivity of -108.
$6172.87
MDS SD04P-ES-C 450-512 MHz (115-230 VAC) With 2 Antenna Ports SD4P-MDCESNNB2N Redundant Protected SD4 transceivers (Ethernet AES-128 Encryption and Managed) With 2 Antenna Ports. Includes two SD-ES 400 MHz (115-230 VAC) With 2 Antenna Ports managed radios each with 1 Ethernet Port and 2 Serial Ports (1 with 4710 Emulation). With 1 Active Ethernet Port and 2 Active Serial Ports. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. (Ethernet and Serial) With 2 Antenna Ports 400 MHz (115-230 VAC) With 2 Antenna Ports Licensed Managed Serial Licensed Radio 5 watt, 10v-30vdc with data rates to 19.2 Kbps at max range of 50 miles, sensitivity of -112 at 1x10-6 BER. with 1 Active Ethernet Port and 2 Active Serial Ports. High speed, up to 65 Kbps in 50 KHz channel. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. Temperature range of -140 to 158 degrees fahrenheit. The MDS SDxP incorporates two MDS SD transceivers and power supplies with automatic or manual switchover capability. On detection of a failure, the MDS SDxP switches immediately to the standby transceiver. The switchover occurs for selectable transceiver alarm conditions. Switchover also occurs when no valid packets are received in a time frame of 1–30 minutes, or upon loss of power to the operating radio. An internal backup battery is provided in AC-powered models for continued operation during a loss of primary power.
$6172.87
MDS SD04P-ES-B 400-450 MHz (115-230 VAC) With 2 Antenna Ports SD4P-MDBESNNB2N Redundant Protected SD4 transceivers (Ethernet AES-128 Encryption and Managed) With 2 Antenna Ports. Includes two SD-ES 400 MHz (115-230 VAC) With 2 Antenna Ports managed radios each with 1 Ethernet Port and 2 Serial Ports (1 with 4710 Emulation). With 1 Active Ethernet Port and 2 Active Serial Ports. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. (Ethernet and Serial) With 2 Antenna Ports 400 MHz (115-230 VAC) With 2 Antenna Ports Licensed Managed Serial Licensed Radio 5 watt, 10v-30vdc with data rates to 19.2 Kbps at max range of 50 miles, sensitivity of -112 at 1x10-6 BER. with 1 Active Ethernet Port and 2 Active Serial Ports. High speed, up to 65 Kbps in 50 KHz channel. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. Temperature range of -140 to 158 degrees fahrenheit. The MDS SDxP incorporates two MDS SD transceivers and power supplies with automatic or manual switchover capability. On detection of a failure, the MDS SDxP switches immediately to the standby transceiver. The switchover occurs for selectable transceiver alarm conditions. Switchover also occurs when no valid packets are received in a time frame of 1–30 minutes, or upon loss of power to the operating radio. An internal backup battery is provided in AC-powered models for continued operation during a loss of primary power.
$6172.87
MDS SD04P-ES-A 350-400 MHz (115-230 VAC) With 2 Antenna Ports SD4P-MDAESNNB2N Redundant Protected SD4 transceivers (Ethernet AES-128 Encryption and Managed) With 2 Antenna Ports. Includes two SD-ES 400 MHz (115-230 VAC) With 2 Antenna Ports managed radios each with 1 Ethernet Port and 2 Serial Ports (1 with 4710 Emulation). With 1 Active Ethernet Port and 2 Active Serial Ports. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. (Ethernet and Serial) With 2 Antenna Ports 400 MHz (115-230 VAC) With 2 Antenna Ports Licensed Managed Serial Licensed Radio 5 watt, 10v-30vdc with data rates to 19.2 Kbps at max range of 50 miles, sensitivity of -112 at 1x10-6 BER. with 1 Active Ethernet Port and 2 Active Serial Ports. High speed, up to 65 Kbps in 50 KHz channel. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. Temperature range of -140 to 158 degrees fahrenheit. The MDS SDxP incorporates two MDS SD transceivers and power supplies with automatic or manual switchover capability. On detection of a failure, the MDS SDxP switches immediately to the standby transceiver. The switchover occurs for selectable transceiver alarm conditions. Switchover also occurs when no valid packets are received in a time frame of 1–30 minutes, or upon loss of power to the operating radio. An internal backup battery is provided in AC-powered models for continued operation during a loss of primary power.
$6172.87
MDS SD04P-ES-C 450-512 MHz (24-48 VDC) With 2 Antenna Ports SD4P-MDCESNN52N Redundant Protected SD4 transceivers (Ethernet AES-128 Encryption and Managed) With 2 Antenna Ports. Includes two SD-ES 400 MHz (24-48 VDC) With 2 Antenna Ports managed radios each with 1 Ethernet Port and 2 Serial Ports (1 with 4710 Emulation). With 1 Active Ethernet Port and 2 Active Serial Ports. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. (Ethernet and Serial) With 2 Antenna Ports 400 MHz (24-48 VDC) With 2 Antenna Ports Licensed Managed Serial Licensed Radio 5 watt, 10v-30vdc with data rates to 19.2 Kbps at max range of 50 miles, sensitivity of -112 at 1x10-6 BER. with 1 Active Ethernet Port and 2 Active Serial Ports. High speed, up to 65 Kbps in 50 KHz channel. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. Temperature range of -140 to 158 degrees fahrenheit. The MDS SDxP incorporates two MDS SD transceivers and power supplies with automatic or manual switchover capability. On detection of a failure, the MDS SDxP switches immediately to the standby transceiver. The switchover occurs for selectable transceiver alarm conditions. Switchover also occurs when no valid packets are received in a time frame of 1–30 minutes, or upon loss of power to the operating radio. An internal backup battery is provided in AC-powered models for continued operation during a loss of primary power.
$6172.87
MDS SD04P-ES-B 400-450 MHz (24-48 VDC) With 2 Antenna Ports SD4P-MDBESNN52N Redundant Protected SD4 transceivers (Ethernet AES-128 Encryption and Managed) With 2 Antenna Ports. Includes two SD-ES 400 MHz (24-48 VDC) With 2 Antenna Ports managed radios each with 1 Ethernet Port and 2 Serial Ports (1 with 4710 Emulation). With 1 Active Ethernet Port and 2 Active Serial Ports. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. (Ethernet and Serial) With 2 Antenna Ports 400 MHz (24-48 VDC) With 2 Antenna Ports Licensed Managed Serial Licensed Radio 5 watt, 10v-30vdc with data rates to 19.2 Kbps at max range of 50 miles, sensitivity of -112 at 1x10-6 BER. with 1 Active Ethernet Port and 2 Active Serial Ports. High speed, up to 65 Kbps in 50 KHz channel. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. Temperature range of -140 to 158 degrees fahrenheit. The MDS SDxP incorporates two MDS SD transceivers and power supplies with automatic or manual switchover capability. On detection of a failure, the MDS SDxP switches immediately to the standby transceiver. The switchover occurs for selectable transceiver alarm conditions. Switchover also occurs when no valid packets are received in a time frame of 1–30 minutes, or upon loss of power to the operating radio. An internal backup battery is provided in AC-powered models for continued operation during a loss of primary power.
$6172.87
MDS SD04P-ES-A 350-400 MHz (24-48 VDC) With 2 Antenna Ports SD4P-MDAESNN52N Redundant Protected SD4 transceivers (Ethernet AES-128 Encryption and Managed) With 2 Antenna Ports. Includes two SD-ES 400 MHz (24-48 VDC) With 2 Antenna Ports managed radios each with 1 Ethernet Port and 2 Serial Ports (1 with 4710 Emulation). With 1 Active Ethernet Port and 2 Active Serial Ports. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. (Ethernet and Serial) With 2 Antenna Ports 400 MHz (24-48 VDC) With 2 Antenna Ports Licensed Managed Serial Licensed Radio 5 watt, 10v-30vdc with data rates to 19.2 Kbps at max range of 50 miles, sensitivity of -112 at 1x10-6 BER. with 1 Active Ethernet Port and 2 Active Serial Ports. High speed, up to 65 Kbps in 50 KHz channel. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. Temperature range of -140 to 158 degrees fahrenheit. The MDS SDxP incorporates two MDS SD transceivers and power supplies with automatic or manual switchover capability. On detection of a failure, the MDS SDxP switches immediately to the standby transceiver. The switchover occurs for selectable transceiver alarm conditions. Switchover also occurs when no valid packets are received in a time frame of 1–30 minutes, or upon loss of power to the operating radio. An internal backup battery is provided in AC-powered models for continued operation during a loss of primary power.
$6172.87
MDS SD04P-ES-C 450-512 MHz (115-230 VAC) With 1 Antenna Port SD4P-MDCESNNB1N Redundant Protected SD4 transceivers (Ethernet AES-128 Encryption and Managed) With 1 Antenna Port. Includes two SD-ES 400 MHz (115-230 VAC) With 1 Antenna Port managed radios each with 1 Ethernet Port and 2 Serial Ports (1 with 4710 Emulation). With 1 Active Ethernet Port and 2 Active Serial Ports. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. (Ethernet and Serial) With 1 Antenna Port 400 MHz (115-230 VAC) With 1 Antenna Port Licensed Managed Serial Licensed Radio 5 watt, 10v-30vdc with data rates to 19.2 Kbps at max range of 50 miles, sensitivity of -112 at 1x10-6 BER. with 1 Active Ethernet Port and 2 Active Serial Ports. High speed, up to 65 Kbps in 50 KHz channel. Programmable RS232/485. Includes authorization for remote management access, AES 128 Encryption, and VRC. Defaults to 4710 emulation mode. Supports packet and transparent modes and IP/Ethernet bridging. Temperature range of -140 to 158 degrees fahrenheit. The MDS SDxP incorporates two MDS SD transceivers and power supplies with automatic or manual switchover capability. On detection of a failure, the MDS SDxP switches immediately to the standby transceiver. The switchover occurs for selectable transceiver alarm conditions. Switchover also occurs when no valid packets are received in a time frame of 1–30 minutes, or upon loss of power to the operating radio. An internal backup battery is provided in AC-powered models for continued operation during a loss of primary power.