The radio shop should make sure ALL of the pagers have been narrow banded correctly. And the levels at the base stations need to be set correctly as well. The standard for paging tones is 60% of maximum deviation for a given bandwidth. So for current NB analog standard, you would set the tones at +/-1.5 KHz deviation, not counting any CTCSS deviation. Also make sure that it's as flat as possible, especially if your using higher or lower tone frequencies. Ideally, they should do an audio sweep from 300 to 3000 Hz and make sure that it stays as flat as possible across that range. I would say about 5% would be my tolerance for that.