Youc an create a simple procedure that dumps the transaction log and prints a message to the error log.
Because this procedure uses a variable (@dbname) for the database name, it can be used for all databases in SAP ASE:
create procedure sp_thresholdaction @dbname varchar(30), @segmentname varchar(30), @free_space int, @status int as dump transaction @dbname to tapedump1 print "LOG DUMP: ’%1!’ for ’%2!’ dumped", @segmentname, @dbname