With the new CDM-625 version 1.4.0, the recently released VersaFEC next generation forward error correction now supports a patent pending Adaptive Coding and Modulation (ACM) mode of operation. VersaFEC was specifically designed to provide maximum coding gain at the lowest possible latency for Constant Coding and Modulation (CCM) and ACM modes of operation. Since VersaFEC uses a constant number of symbols per frame (as opposed to DVB-S2, which uses a constant number of bits per frame), VersaFEC ACM provides a significant reduction in system latency compared to DVB-S2 ACM.

Cellular protocols were originally designed to use entire E1 bearer for backhaul irrespective of actual traffic. This generally is very inefficient when providing cellular backhaul over satellite. Comtech EF Data is now offering an integrated WAN adaptation capability in its CDM-570 Satellite Modem product line, that can significantly reduce the satellite bandwidth required to carry an E1 bearer when used for cellular backhaul.

The WAN Adaptation techniques allow the transmit modem data rate to be reduced relative to the input terrestrial data rate, thus allowing transport of a user-selectable channel subset of standard E1 traffic using less bandwidth. In the receive direction, the adapted data is restored to the E1 format for transport over the G.703 E1 interface.