Reply To: Concurrent calls 3rd November 2009 at 15:44 #59349 PixGuest Keith, Yes, 25mErl/sub is a typical figure 4/4/4 : 1 BTS with 3 sectors, and 4 TRX per sector. Sector 1 = 4 TRX Sector 2 = 4 TRX Sector 3 = 4 TRX … 4/4/4 … 🙂