Digital trunking intercom is the most widely used communication scheduling tool in trunking communication. It generally needs to be implemented within a certain coverage area through specially planned wireless communication frequency and dedicated intercom bearing tools. It has specificity and regionality. specialty. The SMART-PTT trunking communication system based on CDMA 1/EVDO wireless network using VoIP technology reflects the difference with the above traditional walkie-talkie, and can realize flexible intercom in a wider range of coverage of mobile communication networks. Extension and replacement of the functionality of cluster communication products. Therefore, the digital trunk walkie-talkie has become the best choice for walkie-talkie enthusiasts.
Now let me talk about the function of the digital trunk walkie-talkie, let everyone know more about the digital trunk walkie-talkie.
1, basic functions
Fixed group call: After the user enters the fixed group, all the online users in the group can be called, and the other users in the group can also be called.
Dynamic group establishment: Users can initiate invitations to one or more online users to establish dynamic groups to make calls.
Single call: When a user invites a user to create a dynamic group, a one-to-one single-call intercom scenario is implemented.
Edit fixed group: Users with edit group permissions can add, modify, and delete fixed groups on the mobile phone. You can add members of a fixed group and delete members of a fixed group.
User status display: On the client software, you can see whether each user in the group is online and make a valid call.
Call reminder: During the cluster call, the users participating in the call can receive various prompts related to the trunk call status.
Preemptive call: In the same group, when multiple people make a call, in the case of the same call right, the caller first gets the speaking right, and the rest of the users turn to the answering state.
Multiple groups of users: Users can view members of multiple groups and can enter multiple groups to make calls.
Default group: The default group is the group that the user automatically enters after logging in. Each user can specify a default group.
Dropped and automatically reconnected: When the data network is disconnected for some reason, the software will detect if the network is available. When the network is available, the software will dial the connection again.
2, system special features
User call priority: The user has the call priority. The administrator can set and modify the user's call priority. In the same group, when the user with low priority is on the call, the user with the higher priority can interrupt the call at any time. And make a call.
Recording playback: Users can check the speech records of each group on the dispatching station and management platform, and can play back each record. In the enterprise management platform, all the call records in the enterprise can be checked.
Listening: Users can talk to multiple groups at the same time.
Broadcast: The dispatcher can broadcast to all groups in its enterprise.
Authentication and Encryption: When the PTT client logs in, the user is authenticated by the SHA1 Mac algorithm. When transmitting sensitive data, the SHA1 and DES algorithms are used to encrypt the data.
User function setting: The administrator can dynamically add or cancel a user's function module. The administrator can set the user's function, including: friend list; establish dynamic group; group switch; modify user name; view group recording; Edit the group.
Data backup and recovery: The system can perform data backup and recovery on the data about users, groups and user logs. The data backup uses SQL text format, which can realize cross-platform recovery and increase data security.
Three-level management platform: The management platform is divided into two levels of management: operator management and enterprise management:
The main functions of the operator management platform:
Add enterprise user accounts: modify enterprise user account attributes; manage user accounts; version management and online upgrade settings of client software; manage account rights management; data backup and data recovery.
The main functions of the enterprise management platform:
Modify user data: add groups; modify group data; history management and playback; manage secondary management accounts.
Enterprise secondary management: modify user data; add groups; modify group data.
3. Multi-function dispatching platform
Strong insertion: The dispatcher can force the intercom to insert any group.
Forced Demolition: The dispatcher can force users to leave a group.
Remote: The dispatcher can remotely "shut down" the cluster function of the terminal.
Strong pull: The dispatcher can forcibly pull online members who are not in the current group into the group.
Call: The dispatching station can make single call and group call to the user.
Visual scheduling: set mobile phone, personnel positioning, cluster intercom as one.
Two-level scheduling: Each secondary management account added to the enterprise management platform will add a secondary scheduling account. The secondary scheduling account can only manage and manage the secondary management accounts to which it belongs.
4, flow calculation
When using SMART-PTT cluster communication, both incoming calls and calls generate traffic, generating 2.88M of voice per hour and 0.06M of standby 24-hour heartbeat.
5, call delay
The manner in which voice delay is networked is related to the performance of the wireless network. In a 1x network, the average voice delay is 1 second, generally no more than 2 seconds. Under the EVDO network, the average voice delay is 0.6 seconds, generally no more than 1 second.
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