U might have read my comment about 24 seats, I said it bcoz…the T1 lines in US carries only 24 voice channels. So I said 24 setas ll be ideal…..more than that while buying MUX they ll tell u 3o E1 channels and all…..but thruth is only 24 channeles ll be available…so its nit economically viable to go for 30 or so.