BLF from remote Asterisk over trunk

Good afternoon, colleagues!

Are there any possibility to receive BLF hints from the remote asterisk via the trunk? (IAX2, for example.)

It is very important for the case when one corporative numbering space is divided between several remote offices. But telephone operator is located in one office, but serves the entire space. And for it is important to see the BLF statuses of employees in other offices.

(I saw some kind of solution when the hints is transmitted through the external Jabber server in Java, but in my opinion, this savagery and obscurantism. Is not it easier to transfer them via a communication trunk, which in any case is already installed?)