J2550-69013EtherTwist 10Base-T LAN interface board
J2555-69013JetDirect Card Token RingToken ring LAN interface board - DB-9 and RJ-45 connectors
J4100-69001JetDirect 400N modular input/output (MIO) internal print server - Provides 10/100Base-TX or 10Base-2 network connection using RJ45 or BNC connectors
J4106-69001JetDirect 400N modular input/output (MIO) internal print server - Provides 10Base-T network connection using RJ45 connector
RG5-0512-070CNPaper control board - On right side of paper feed assembly