8E1-16E1 FOM480 PDH    19 inches wide and 1U high, 16×E1, 1+1 optical interfaces with smooth switch and ASL function. 4 unit slots for 4×X cards. 4×E1,4×V.35 and 10/100Base_T cards available. All cards supporting are hot-swap. AC220V/110V and DC48V/60V power feeding, AC1+1 or DC1+1 protection available. LED, LCD and keys for local and remote settings. SNMP optional.