I know this should be elementary chart reading, but it's been a long time since elementary school and I'm having a brain block on chart reading. Reference the attached slice of sectional. I'm trying to figure out the frequency to contact the Fort Worth FSS so I could activate my flight plan while in the air. AirNav.com for KDTO (my home airport) lists the FSS to be Fort Worth. Looking in the front of the A/FD (Page 16, Communications), I think I got it figured out that the frequency to use is 122.2. Is this correct?