| Communication | 
| Option # | Manufacturing Part #
 | Description | Previous Part #
 | 
| X1008A
 [S] | 501-1931
 [F] | Serial Parallel Controller (SPC/S) | n/a | 
| X1012A
 [S] | 501-2603
 [F] | SunLink ISDN | n/a | 
| X1014A
 [S] | 501-1932
 [F] | Token Ring Interface (TRI/S) | n/a | 
| X1019A
 [S] | 501-1725
 [F] | High Speed Serial Interface (HSI/S) | n/a | 
| X1025A
 [S] | 370-2339
 [F] | FDDI/S Single-Attach SBus (SAS) 5.0 | n/a | 
| X1026A
 [S] | 370-2340
 [F] | FDDI/S Dual-Attach SBus (DAS) 5.0 | n/a | 
| X1060A
 [S] | 501-2794
 [F] | SunATM-155/MFiber 2.0 | n/a | 
| X1061A
 [S] | 501-2795
 [F] | SunATM-155/UTP 2.0 | n/a | 
| X1064A
 [S] | 501-2864
 [F] | SunATM-622/MFiber | n/a | 
| X1142A
 [S] | 370-3142
 [F] | FDDI/S Single-Attach SBus (SAS) 5.0/6.0 | n/a | 
| X1143A
 [S] | 370-3143
 [F] | FDDI/S Dual-Attach SBus (DAS) 5.0/6.0 | n/a | 
| X1144A
 [S] | 501-1932
 [F] | Token Ring Interface/SBus (TRI/S) 4.0 | n/a | 
| X1145A
 [S] | 501-1725
 [F] | High Speed Serial Interface/SBus (HSI/S) 3.0 | n/a | 
| X1146A
 [S] | 501-1931
 [F] | Serial Parallel Controller (SPC/S) 3.0 | n/a | 
| X1147A
 [S] | 501-2794
 [F] | SunATM-155/MFiber SBus Adapter 4.0 | n/a | 
| X1148A
 [S] | 501-2795
 [F] | SunATM-155/UTP SBus Adapter 4.0 | n/a | 
| X1149A
 [S] | 501-2864
 [F] | SunATM-622/MFiber Dual Wide Adapter 4.0 | n/a |