ISDN over Fibre
Basic and Primary rate ISDN fibre optic extenders. To extend BR circuits over long distances, please see our ISDN over IP products.
CT-FRM220-E1/T1/SFP
G.703 E1/T1/PRI Fibre Optic Modem
FRM2-BRI-ST2
ISDN Basic Rate Fibre modem