Sangoma Dialogic DMG Media Gateway 2000Refurbished New Sangoma Dialogic DMG2030DTISQ 1-span T1/E1 Media Gateway 2000 1250 Sangoma Dialogic DMG2060DTISQ 1-span T1/E1 Media Gateway 2000 1550 Sangoma Dialogic DMG2120DTISQ 1-span T1/E1 Media Gateway 2000 1950