| CMC | Common Mezzanine Card |
| FEMB | Front-End Motherboard |
| LCLK | Link Clock |
| LCTRL# | Link Control bit |
| LD[31..0] | Link Data |
| LDC | Link Destination Card |
| LDERR# | Link Data Error |
| LDOWN# | Link Down |
| LFF# | Link Full Flag |
| LRL[3..0] | Link Return Line |
| LSC | Link Source Card |
| LWEN# | Link Write Enable |
| ROMB | Read-Out Motherboard |
| UCLK | User Clock |
| UCTRL# | User Control bit |
| UD[31..0] | User Data |
| UDW | User Data Width |
| UTDO# | User Test Data Out |
| URESET# | User Reset |
| URL[3..0] | User Return Line |
| UTEST# | User Test |
| UWEN# | User Write Enable |
| UXOFF# | User Xmit Off |