It might help if you posted the frequency and location where it was heard.
It sounds like 1200 baud AFSK data like what is used by SCADA, ANI and OTAR.
It is probably SCADA. If this is a fire dispatch channel, it could be Zetron fast FSK polling various fire stations to ensure a link is available for the station alerting. You should hear voice dispatch occasionally. Otherwise it is just SCADA terminals such as used at sewage pump stations .