Digium TDM2403B

24 port modular analog PCI 3.3/5.0V card with 12 Trunk interfaces.

The Digium Wildcard TDM2400P is a full-sized 32-bit, 33 MHz PCI 2.2 card that supports FXS and FXO interfaces for connecting analog phones and analog phone lines to a PC. With the help of an Asterisk Open Source PBX IP telephone exchange server and a primary PC, the purchase of a Digium Wildcard TDM2400P can provide a telephone exchange for a small office, which will provide all the complex and basic functions of the daily telecommunications equipment for great business.

The Digium Wildcard TDM2400P board takes the place of a bulky and expensive channel concentrator, and the performance of the IP telephony system is even low. Vikorist mezzanines X400M and S400M with TDM2400P board, a solution can be developed that supports a variety of telephone terminations. To increase the scale of your solution, simply add additional TDM2400P cards with the necessary sets of interface modules and echo compensation.

Apparently, the QFXO / QFXS mezzanine has 4 ports.

Decoding the smart values of TDM sets is available: TDM24 XYB, where “TDM24” means the same as Digium Wildcard TDM2400P, “X” means the number of FXS mesonines, “Y” means the number of FXO mezzanines, "B" means that the dialing is without hardware echo compensation. "E" means dialing at the same time with hardware echo compensation.