LQ-R2W4:1RU 4-port partyline interface LQ-R4W8:1RU 8-port 4-wire interface LQ-R4WG8:1RU 8-port 4-wire with GPIO interface LQ-R2W4-4W4:1RU 8-port (4) 2-Wire, (4) 4-wire interface LQ-R2W4-4WG4:1RU 8-port (4) 2-Wire and (4) 4-wire with GPIO interface Include:(2)...