Vnetek is your source for Enterasys Networks XSR network modules.
| Manufacturer Part Number | Description | |
| NIM-CT1/E1-1 | 1-Port Channel T1/E1 Network Interface Module |  |
| NIM-CT1E1/PRI-1 | 1-Port channelized T1/E1 with support for ISDN PRI and Integrated CSU/DSU | |
| NIM-T1/E1-01 | 1-Port T1/E1 network interface module, provides Clear Channel and Fractional operation with Integrated CSU/DSU | |
| NIM-CT1E1/PRI-2 | 2-Port channelized T1/E1 with support for ISDN PRI and Integrated CSU/DSU | |
| NIM-SER-02 | 2-Port Sync/Async Serial network interface module (2Mbps per port) Note: These are not HSSI interfaces | |
| NIM-T1/E1-02 | 2-Port T1/E1 plug-in module, DSU/CSU | |
| NIM-CT1/E1-4 | 4-Port Channel T1/E1 Network Interface Module | |
| NIM-CT1E1/PRI-4 | 4-Port channelized T1/E1 with support for ISDN PRI and Integrated CSU/DSU | |
| NIM-T1/E1-04 | 4-Port T1/E1 plug-in module, DSU/CSU | |