Narrative:

The flight was the first leg of a three-day trip. We had just departed runway 27R on the RNAV departure with a clearance to 10;000 feet. We checked in with departure control and were told 'delete the 250 knot speed restriction.' we were then given a climb to 14;000 feet and contact center. We read back the altitude and frequency and switched to center. We were then cleared to climb to FL240. Moments later we received a TCAS alert and complied with its commands. We questioned ATC as to what happened and they switched us back to departure control. Departure control informed us that we had mistakenly taken another aircraft's altitude clearance and frequency change. We continued on to ZZZ and called ATC upon landing. The supervisor gave us an explanation as to what had happened. The departure controller had given a climb clearance and frequency change in the same transmission which he said they shouldn't do. The clearance we had taken was meant for the aircraft in front of us on the same departure.flying out of this airport is busy enough. But flying an older model aircraft just adds to the workload. No auto throttles; no map display; etc. I feel these planes should be base specific like we did with the old pre-FMS aircraft back in the day.

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Original NASA ASRS Text

Title: A flight crew flying a less automated aircraft than they were accustomed to and somewhat overloaded; took another aircraft's clearance which resulted in a TCAS alert along with a call to ATC.

Narrative: The flight was the first leg of a three-day trip. We had just departed Runway 27R on the RNAV Departure with a clearance to 10;000 Feet. We checked in with Departure Control and were told 'delete the 250 knot speed restriction.' We were then given a climb to 14;000 Feet and contact Center. We read back the altitude and frequency and switched to Center. We were then cleared to climb to FL240. Moments later we received a TCAS Alert and complied with its commands. We questioned ATC as to what happened and they switched us back to Departure Control. Departure Control informed us that we had mistakenly taken another aircraft's altitude clearance and frequency change. We continued on to ZZZ and called ATC upon landing. The Supervisor gave us an explanation as to what had happened. The Departure Controller had given a climb clearance and frequency change in the same transmission which he said they shouldn't do. The clearance we had taken was meant for the aircraft in front of us on the same departure.Flying out of this airport is busy enough. But flying an older model aircraft just adds to the workload. No auto throttles; no map display; etc. I feel these planes should be base specific like we did with the old pre-FMS aircraft back in the day.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.