[nffc]

That telecam will be fine, it's probably the best indoor you can get. You might want a booster though. Just don't get one with one of those daft gain controls because they don't work and read the damn dB ratings carefully.

Remember a booster can't improve on a crap signal only a weak signal, if your signal is noisy the booster will amplify the noise, as well as the signal, and will introduce its own noise.

Also remember decibels are exponential so a 1 dB rise is a tenfold difference.