Can I send a message to the group trumpet without joining the group number?

Group trumpet is the mobile phone of employees in the group, forming a group network.

You can enjoy certain discounts when making mobile phones in the group network, and the group network can also set 3-6-digit trumpet for mobile phones in the network. For example, both A and B are employees of a certain group, and their mobile phones have joined the group network and set up a small number. A is 660 1, and B is 6602, so that the call between A and B can be dialed with the big number of 1 1.

Trumpet is a group that joins a virtual platform, and calling each other on this platform is free. Trumpet trunking network service: it is to establish a special virtual network for mobile GSM, Shenzhouxing, M-Zone and Shenzhouxing public card customers through the cornet function, and carry out unified numbering and networking, so that all brand users can enjoy monthly (provincial) call tariff concessions through trumpet for 24 hours.