Mqtt protocol and time of KEEP ALIVE

question about KEEP ALIVE
I’m working with esseti with this device [4G.VoLTE | Esse-ti](https://esseti 4g volte) that send mqtt data to thinger mqtt broker.
The MQTT package consists of : connect code + length + Protocol name + Protocol Version + Connect Flags + keep alive + …
Now this device send KEEP ALIVE every 150 sec.
they would like to know if the MQTT broker has been set with more reduced time specifications for the KEEP ALIVE?

thx and best regards