DoubleTalk Carrier-in-Carrier, based on the patented "Adaptive Cancellation" technology, allows the transmit and receive carriers of a duplex link to share the same transponder space. LDPC is an advanced FEC capable of providing performance much closer to the Shannon limit compared to any other technique. The combination of LDPC and DoubleTalk Carrier-in-Carrier can enable savings in transponder bandwidth and power utilization, as well as earth station BUC/HPA size

The CDM-625 includes a number of other advanced features. Supporting 70/140 MHz and L-Band capability in the same unit with independently selectable transmit and receive IF, it simplifies sparing and stocking in networks requiring both frequencies. It features data rates from 18 kbps to 25 Mbps and symbol rates of 18 ksps to 12.5 Msps. The unit supports Viterbi, Concatenated Reed Solomon, and TCM Forward Error Correction plus an integrated TPC and LDPC codec. Providing ultimate flexibility for diverse environments, the CDM-625 offers a wide range of data interfaces, including EIA‑422/530, V.35, G.703 T1, G.703 E1, G.703 T2, G.703 E2, Quad G.703 E1, ASI, LVDS, HSSI, and 4-port 10/100BaseT Ethernet for traffic bridging.

For telecommunications and high speed trunking applications, the CDM-625 supports a Quad E1 interface that can aggregate up to four full or fractional E1s into a single carrier with