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D3CM1604 DOCSIS 3.0 Cable Modem Administrator Manual
Appendix A -
Glossary
Term
Definition
Correctables
Number of codewords that were detected to be damaged, but could be repaired by the cable
modem.
Downstream
The direction from the head-end toward the subscriber. The downstream channel carries data from
the ISP's head end (UBR) to your cable modem.
DS1
Digital Signal 1. A T-carrier signaling method that is widely used standard in telecommunications in
North America and Japan to transmit voice and data between devices.
Uncorrectables
Number of codewords that were detected to be damaged beyond possibility of repair by the cable
modem. If this count is increasing, the downstream signal conditions are unacceptable, regardless
of how good the SNR and power figures look on the Connection page (see “Viewing Network
Connectivity” on page 39). Uncorrectables disappear after a reboot because the cable modem
resets its counters to zero without store that data permanently in its memory.
Upstream
The direction from the subscriber toward the head-end. The upstream channel carries data from
your cable modem to the ISP's head-end.
