After 10 years working with Courtyard, Conrad, Dorchester, Marriott, Ramada, Sheraton, Data Track Communications are Europe's leading hotel guest telephony strategy and Call Yield Management (CYM) experts. CYM delivers: centralised revenue management and tariff control revenue loss elimination staff cost and carrier management benchmarking, trend & performance analysis CYM works across diverse technologies, multiple hotels/country locations and requires no systems changes or capital expenditure.