27.195 MHz AM Mexican Taxi Cab Dispatch 1645 UTC 4 April 2025

[R4002]

This is another good frequency to check, first to see if there's any voice traffic on the frequency...and second to hear the various data signals on here.  There is usually a constant or nearly constant data stream when the band is open to points south of the border. 

I can hear a YL taxi cab dispatcher on frequency, Spanish language, likely Mexico, possible CDMX (Mexico City) based on the taxi ID number formats.  Mexico City uses alphanumeric IDs, other places do not (or this is at least what I've read and have been told).  As of 1644z, the data signals are there, but extremely weak, much weaker than usual.  The taxi cab dispatcher lady is also considerably weaker than her counterpart down on 26.765 MHz AM / 26765 kHz AM. 

EDIT:  At 1645 UTC, a different data signal appeared...sounds like a FFSK burst, duration maybe 1 second, with a very distinct "BEEP" (lower-frequency than most "Roger Beeps").  Reminds me of the AX.25 packet I've heard on 27.235 MHz (CB Channel 24) and 27.245 MHz (CB Channel 25).