Siemens
- SD50 PBX
- SD192MX PBX
- SD232 PBX
- Saturn I PBX
- Saturn II PBX
- Saturn IIE PBX
- Saturn III PBX
- Hicom 100
- Hicom 300
- HiPath 3000
- HiPath 4000
- HiPath 5000
- HiPath 8000
- OpenScape SIP
- No. 16 Step-by-Step
- No. 17 Step-by-Step
- No. 51 Step-by-Step
- EDX-P
- EMD55
- EMD56
- EMD57
- ESK - CP24
- ESK - CP44
- ESK - CP44A
- ESK 10000 E
- EWSD
- Remote Switch Unit RSU-DE3
- Remote Switch Unit RSU-DE4
- Remote Switch Unit RSU-DE5
- RCUB-800C
- DCO-CS (Formerly Stromberg Carlson DCO) - Sold to Genband in 2006
- HiQ8000
- SPX2000 (Formerly Equitel)
Read more about this topic: List Of Telephone Switches