Odd that a Top 40 station would not play 45 rpm singles on the air and, when Andy Travis, the new Program Director, gives Johnny Caravella (who becomes Dr. Johnny Fever) rock 'n' roll records (all albums), the first record (in the new format) he spins ends up "playing the label" when they break for a commercial.
When Travis sends Jennifer off to call the police on another phone, she heads to the back of the booth which leads to the bullpen and studio. She should have headed to Mr. Carlson's office as it's much closer. While it may be closer, even with the door closed, Jennifer might be too close to Andy to have a phone conversation with the police without the possibility of the Black Monday terrorist hearing her in the background (most especially the door closing). Therefore, going as far away from Andy as possible to make the call was a smarter move.