| Communication | 
| Option # | Manufacturing Part #
 | Description | Previous Part #
 | 
| X1008A
 [S] | 501-1931
 [F] | Serial Parallel Controller SBus (SPC/S) | n/a | 
| X1012A
 [S] | 501-2603
 [F] | SunLink ISDN | n/a | 
| X1014A
 [S] | 501-1932
 [F] | Token Ring Interface/SBus (TRI/S) | n/a | 
| X1019A
 [S] | 501-1725
 [F] | High Speed Serial Interface/SBus (HSI/S) | n/a | 
| X1023A
 [S] | 370-2715
 [F] | FDDI/S Single-Attach SBus (SAS) 4.0 | n/a | 
| X1024A
 [S] | 370-2716
 [F] | FDDI/S Dual-Attach SBus (DAS) 4.0 | 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 | 
| X1035A
 [S] | 370-2811
 [F] | FDDI/P SAS Adapter PCI 1.0 | n/a | 
| X1036A
 [S] | 370-2812
 [F] | FDDI/P DAS Adapter PCI 1.0 | n/a | 
| X1039A
 [S] | 375-0001
 [F] | Token Ring Interface PCI (TRI/P) 1.0 | n/a | 
| X1040A
 [S] | 370-2728
 [F] | High Speed Serial Interface PCI (HSI/P) 1.0 | n/a | 
| X1041A
 [S] | 370-2810
 [F] | Serial Asynchronous Interface PCI (SAI/P) 1.0 | n/a | 
| X1050A
 [S] | 501-2523
 [F] | SunATM-155/MFiber SBus 1.0 | n/a | 
| X1051A
 [S] | 501-2665
 [F] | SunATM-155/UTP5 SBus 1.0 | n/a | 
| X1060A
 [S] | 501-2794
 [F] | SunATM-155/MFiber SBus 2.X | n/a | 
| X1061A
 [S] | 501-2795
 [F] | SunATM-155/UTP SBus 2.X | n/a | 
| X1064A
 [S] | 501-2864
 [F] | SunATM-622/MFiber SBus 2.X | n/a | 
| X1066A
 [S] | 501-3028
 [F] | SunATM-155/MFiber PCI 3.0 | n/a | 
| X1067A
 [S] | 501-3027
 [F] | SunATM-155/UTP PCI 3.0 | n/a | 
| X1068A
 [S] | 501-3029
 [F] | SunATM-622/MFiber PCI 3.0 | n/a | 
| X1070A
 [S] | 370-3878
 [F] | HIPPI/P 1.0 High Performance Interface Board | n/a | 
| X1071A
 [S] | 370-3878
 [F] | HIPPI/P 1.1 High Performance Interface Board | n/a | 
| X1080A
 [S] | 370-4273
 [F] | Enterprise System Interface (ESI/P) | n/a | 
| X1133A
 [S] | 375-0130
 [F] | Crypto Accelerator I | 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 SBus (SPC/S) 3.0 | n/a | 
| X1147A
 [S] | 501-2794
 [F] | SunATM-155/MFiber SBus 4.0 | n/a | 
| X1148A
 [S] | 501-2795
 [F] | SunATM-155/UTP SBus 4.0 | n/a | 
| X1149A
 [S] | 501-2864
 [F] | SunATM-622/MFiber SBus 4.0 | n/a | 
| X1152A
 [S] | 370-2811
 [F] | FDDI/P SAS Adapter PCI 2.0 | n/a | 
| X1153A
 [S] | 370-2812
 [F] | FDDI/P DAS Adapter PCI 2.0 | n/a | 
| X1154A
 [S] | 375-0001
 [F] | Token Ring Interface PCI (TRI/P) 4.0 | n/a | 
| X1155A
 [S] | 370-2728
 [F] | High Speed Serial Interface PCI (HSI/P) 2.0 | n/a | 
| X1156A
 [S] | 370-2810
 [F] | Serial Asynchronous Interface PCI (SAI/P) 2.0 | n/a | 
| X1157A
 [S] | 501-3028
 [F] | SunATM-155/MFiber PCI 4.0 | n/a | 
| X1158A
 [S] | 501-3027
 [F] | SunATM-155/UTP PCI 4.0 | n/a | 
| X1159A
 [S] | 501-3029
 [F] | SunATM-622/MFiber PCI 4.0 | n/a | 
| X2144A
 [S] | 501-1932
 [F] | Token Ring Interface/SBus (TRI/S) 5.0 | n/a | 
| X2154A
 [S] | 375-0073
 [F] | Token Ring Interface (TRI/P) 5.0 | n/a | 
| X2156A
 [S] | 375-0100
 [F] | Serial Asynchronous Interface PCI (SAI/P) 3.0 | n/a |