| Cronyx Tau-PCI |
| | V.35 and RS-232 interfaces |
| Cronyx Tau-PCI/R |
| | RS-530(RS-449) and X.21 interfaces |
| Cronyx Tau-PCI-L |
| | one V.35 and RS-232 interface, low profile |
| Cronyx Tau-PCI-L/R |
| | one RS-530(RS-449) and X.21 interface, low profile |
| Cronyx Tau-PCI-E1 |
| | fractional E1 interfaces |
| Cronyx Tau-PCI-G703 |
| | unframed E1 interfaces |
| Cronyx Tau-PCI-2E1 |
| | fractional E1 and unframed E1 interfaces |
| Cronyx Tau-PCI-4E1 |
| | fractional E1 and unframed E1 interfaces |
| Cronyx Tau-PCI-E3 |
| | E3 interface |
| Cronyx Tau-PCI-T3 |
| | T3 interface |
| Cronyx Tau-PCI-STS1 |
| | STS-1 interface |
|