The G430 Branch Gateway supports up to 2 DSPs, one optional on-board with 25 or 40 channels on the G430v3, and one as a daughter card that can support 25, 80 or 120 channels. The maximum number of supported active channels is 120. All channels can be bidirectional FAX, G.711 u/A, and G.726A calls. If G.729A/AB is used, the maximum number of channels on the 25 channels on-board DSP is 20.