here are the specs of the lines coming out of the Motorola SBV5322:
Line Type: 2wire
Hook State Signaling: Loop Start
Max Loop: 1000ft
DTMF Level Sensitivity: 0 to -20db
Speed Coding 64kbps PCM, u-law or A-law Commanding; supports G.711 and other low-rate vocoders.
Loss Plan receive (D/A) 4db; transmit (A/D)2db
Loss Plan Tolerance +- 1dB
I'm attatching my config