The Digium Wildcard TDM2422E is a full-length PCI 2.2-compliant card that supports FXS and FXO station interfaces for connecting analog telephones and analog POTS lines through a PC. Using Digium's Asterisk Open Source PBX software and standard PC hardware, one can create a SOHO (Small Office Home Office) telephony environment that includes all the sophisticated features of a high-end business telephone system.

The TDM2422E takes the place of an expensive channel bank and brings the system price point to a low level. By using X400M and S400M modules with the TDM2422E, one can create a solution with support for a range of telephones. To scale this solution, simply add additional TDM2422E cards populated with modules.