Basic concept of walkie-talkie cluster

Date:Jan 16, 2021

The walkie-talkie cluster technology is suitable for users who are more intensive, require advanced dispatching and command functions, and higher data capabilities. The mission-oriented digital trunking system has complete mission-oriented features, can realize a complete end-to-end solution, has a high degree of integrated voice and data capabilities, and can flexibly expand the network scale. It is a highly reliable system that can target Tailor-made solutions for specific tasks.

Question: How to understand the movement on the channel of the trunking radio?

Answer: A wireless unit can respond to a message sent to it on a channel, or it is transmitting, or is between these two states, it is said that the wireless unit is active on this channel. It should be noted that a wireless unit is active as long as it can receive on the designated traffic channel. On the control channel, the wireless unit can only be active when it receives a code word containing a suitable system identification code.

Question: Why does the group walkie-talkie use address and address codeword?

Answer: Used to determine a unit or a group of units in a system. Usually the address contains two sections, namely prefix and identification code. Address codeword refers to a channel codeword that meets standard requirements and can determine the nature of the message. Usually the first bit in the address code word is "1", and in any message, the address code word is always its first code word.

Question: What is the base station of the trunking radio?

Answer: The base station of the trunking walkie-talkie refers to the whole composed of transmitter and receiver operated by the trunking system controller in a specific area.

Question: How to understand the call of the group intercom?

Answer: Trunking intercom call refers to a complete message exchange between two or more parties. It includes one or more service processing, and may include direct user-to-user communication on the traffic channel.

Question: What is the function of the control channel of the trunking radio?

Answer: The trunking radio control channel is used to transmit the forward and reverse channels of messages. These messages must comply with the standard, and their main purpose is to enable the cluster system controller to control the wireless unit.

Question: How to distinguish the call unit of the trunking intercom?

The trunking intercom call unit refers to a wireless unit or a wired unit that requests a call. The calling unit maintains this identity during a call, and regardless of where the message originates, this convention is always used in messages related to the specific call.

Question: What is the function of the data code word of the trunking radio?

Answer: Trunking radio data codeword refers to a channel codeword that meets the standard requirements, usually the first bit is "0". The data codeword is associated with the address codeword and serves as a supplement to the address codeword message.

Question: How to understand the transfer function of cluster walkie-talkie?

Answer: The transfer function of trunked walkie-talkie refers to a process in which a party can request a call to a specific address to be redirected to another alternative destination. Usually, the replacement target can be a wireless or wired unit, a unit group, a PABX extension, or a PSTN number.

Question: Why does the cluster intercom appear. Random connection attempts?

Random connection attempt refers to a method of trunking walkie-talkie, the wireless unit uses it to send an unsolicited message to the trunking system controller on the control channel. If the wireless unit does not receive the response message within the specified waiting time, this method requires the wireless unit to repeat the random connection message; if it does not receive a suitable response, it also requires further repeated transmissions until the specified number of repeated transmissions is reached. . Generally, the random connection attempt of the trunking system standard refers to the start of business processing until the receipt of a suitable response, or the time limit is reached.

Question: How to understand the request unit and the requested unit of the trunked walkie-talkie?

Answer: The request unit refers to the wireless unit or wired unit that initiates service processing. The business processing can be with the cluster system controller or with another unit.The requested unit refers to a unit or a group of units involved in business processing. The business processing is initiated by the cluster system controller or another unit.

Question: How to understand the reverse channel of the trunking radio?

Answer: The reverse channel of the trunked walkie-talkie refers to the wireless carrier in the transmission direction from the wireless unit to the base station.

Question: Does the trunked walkie-talkie support short data transmission?

Answer: Short data transmission is a process of trunking walkie-talkie, which can allow data messages to be exchanged between communication objects (including units or users) or between communication objects and trunking system controllers, but a data message does not exceed 4 data code words .

Question: What is the abbreviated PSTN goal of the trunking radio?

Answer: The abbreviated PSTN target of the trunking walkie-talkie is pre-arranged between the system operator and the calling unit user. The called PSTN party can be represented by a special identification code instead of the complete number.

Question: How to understand the special identification code of the trunking radio?

Answer: The special identification code refers to the identification code with special purpose in the trunking radio. In MPT1327 signaling, the decimal value of the special identification code is greater than 8100. Generally, the trunking system will leave a certain special identification code for the system operator to use. The special identification code cannot be used with the prefix to form an address.

Question: Is the system identification code of the trunking intercom system unique?

Answer: The system identification code is a number that uniquely identifies a system. In MPT1327 signaling, the system identification code is 15 bits. Within the system, the system identification code is usually sent on the forward control channel.

Question: What role can the cluster system controller TSC of cluster walkie-talkie play?

Answer: The TSC of the trunked walkie-talkie trunking system refers to the central control intelligent unit, which can make the trunking system reach the functions specified in the standard. Generally, the cluster system controller can control one or more base stations, which can be placed together with the base stations or separately.

Question: Why does the trunking radio have a forward channel?

Answer: The forward channel refers to the wireless carrier from the base station to the wireless unit.

Question: How many ways are there for group intercom group calls?

Answer: Group intercom group call refers to the call when the group address is the called party, which can provide communication between two or more units. In a group call, the caller can choose the normal mode, which is a call where all communicating parties can speak; or the broadcast mode, which is a call where only the caller can speak.