Comdial (G1632) Modem "3x8" Questions

Comdial 3x8 Will any Comdial phone, say a Comdial 6714 or 6600 work with this KSU (No Mod # on KSU) form a vacant port? I don''t think so. The 6600 and 67xx series were designed for the "N" Ksu's and ...