Abstract: A method of managing access to a push-to-talk-over-cellular (POC) talkgroup may include providing a control device configured to manage a first talkgroup, granting a first non-subscriber device access to the first talkgroup, and transmitting, from the control device to the first non-subscriber device, a first communication including a link to download a POC software application configured to access the first talkgroup. A method of managing access to a push-to-talk-over-cellular (POC) talkgroup may alternatively include providing a control device configured to manage a first talkgroup, providing a first subscriber device, transmitting, from the first subscriber device to the control device, first non-subscriber contact information associated with a first non-subscriber device, and granting the first non-subscriber device access to the first talkgroup.

Abstract: A land mobile radio (LMR) device may be used with a cellular device in communication with a push-to-talk-over-cellular (POC) network. The LMR device may include an LMR processor, an LMR memory, an LMR local communication interface configured to communicate with the cellular device, and a channel selection input. The LMR processor may be configured to retrieve channel configuration information defining one or more POC channels from the cellular device via the LMR local communication interface and store the channel configuration information in the LMR memory. The channel selection input may be configured to select a selected channel from the one or more POC channels defined by the channel configuration information. The LMR local communication interface may be configured to communicate with the POC network over the selected channel via the cellular device.

Abstract: A method for configuring a land mobile radio (LMR) may include providing a hub device and providing a destination LMR device. The hub device may include a hub memory, a hub communication interface, and a hub processor operably coupled to the hub memory and the hub communication interface. The destination LMR device may include a destination LMR memory, a LMR destination communication interface, and a LMR destination processor operably coupled to the destination LMR memory and the destination LMR communication interface. The method may further include storing a configuration parameter in the hub memory, establishing communication between the hub communication interface and the destination LMR communication interface, transmitting the configuration parameter from the hub memory to the destination LMR memory, and controlling the destination LMR device to implement the configuration parameter.

Abstract: A P25 radio can be configured to implement a key management facility to thereby manage keysets for and provision the keysets on other P25 radios in a communications system. The P25 radio, as a radio, can directly communicate with the other P25 radios to provision keysets in accordance with the OTAR protocol. The P25 radio may also be configured to function as a key fill device to thereby provision keysets manually on any of the other P25 radios to which it may be physically or wirelessly connected. The P25 radio may also be configured to use the keysets to communicate securely with any of the other P25 radios.

Abstract: A P25 radio can be configured to implement a key management facility to thereby manage keysets for and provision the keysets on other P25 radios in a communications system. The P25 radio, as a radio, can directly communicate with the other P25 radios to provision keysets in accordance with the OTAR protocol. The P25 radio may also be configured to function as a key fill device to thereby provision keysets manually on any of the other P25 radios to which it may be physically or wirelessly connected. The P25 radio may also be configured to use the keysets to communicate securely with any of the other P25 radios.

Abstract: Public safety official accessories, such as remote speaker microphones and body cameras, can include an infrared thermometer for enabling public safety officials to detect whether individuals have fevers. Temperature readings obtained using the public safety official accessories can be output to a display of a radio or of the public safety official accessory. By integrating an infrared thermometer into a public safety official accessory, the public safety official can discreetly determine whether an individual has a fever.

Abstract: A method for transmitting a communication generated by an originating device to a target device using a repeating device is provided. In the method the communication is transmitted from the originating device and received at the repeating device. A repeater request sequence is transmitted from the originating device and retransmitted from the first repeating device to the target device before the repeater request sequence is received at the first repeating device.

Abstract: A digital radio communication system (200) uses a repeater (216) to relay calls which can not be completed in a direct talk-around mode between two radios. The repeater (216) establishes early synchronization in advance of a pending call by listening to an originator radio (204) attempt to make a direct talk-around call to a target radio (210). Asynchronous digital two-way radio communication systems can benefit from the reduction in voice call connect time.

Abstract: A digital radio communication system (200) uses a repeater (216) to relay calls which can not be completed in a direct talk-around mode between two radios. The repeater (216) establishes early synchronization in advance of a pending call by listening to an originator radio (204) attempt to make a direct talk-around call to a target radio (210). Asynchronous digital two-way radio communication systems can benefit from the reduction in voice call connect time.

Abstract: A self-tuning VCO (116) receives a control voltage input (Vcont) (114) and an adjustable programmable voltage (Vadj) (122) and provides optimized locked conditions even under variations in temperature. A radio temperature is measured and stored (204) while Vadj (122) is initialized and stepped and Vcont (114) attempts to lock the VCO on frequency. Once a locked condition is achieved, the Vcont (114) is monitored to determine if it falls within a predetermined voltage range. If a non-optimized condition is detected, then the Vadj (122) is automatically adjusted until the VCO (116) becomes locked with a Vcont which falls within the predetermined voltage range. When a locked condition is achieved, the radio temperature is monitored and compared (212) to the original stored temperature (204). If a temperature threshold limit is reached (216) then the VCO is re-checks itself for a locked condition and re-optimizes itself to accommodate for the variations in temperature.

Abstract: An electronic device (100) having a battery (116) with an associated battery voltage. The battery (116) includes a plurality of cells configured to form a plurality of battery portions (116A and 116B). The electronic device (100) also includes a regulator (102), a first circuit (118), and a swith control circuit (106). The regulator (102) operates on the battery voltage and produces a regulated voltage. The first circuit (118) operated on the battery voltage. The switch control circuit (106) alternately applies the regulated voltage to the plurality of battery portions (116A and 116B) so as to charge the battery (116).