"XXX" means extensive calling, and "XXX" is usually followed by the caller's call sign. Generally, it is interpreted in a standard way, for example, H is pronounced as hotel, and it is interpreted as a communication card on QSL radio station, that is, after the communication is successful, both parties send cards similar to postcards to prove the communication.
If you don't copy it all, the speaker's grammar application is not very good. It is estimated that this sentence means: This is XXX calling everyone, and my communication card is ready.