SPA FPGA Packet Error Counters: 202 Receive error packets Framer (PM5383) Counters: Transmit : 80614555 packets, 1165231422 bytes Errors : 0 aborts, 0 underruns Receive : 81583399 packets, 2171463422 bytes Errors : 10 crc, 1072 runts, 0 giants, 54 aborts This output shows a healthy clear-channel DS3. The framing is C-bit. Notice that there are FEBEs shown. FEBEs may increment in small numbers over time without serious impact. The preceding output indicates that the counters were cleared six days ago. Since then, 792 FEBEs have accumulated, which translates to about 5.5 per hour (assuming an even distribution). Another possibility is that something hap- pened within the past six days that caused FEBEs to increment in a short amount of time. In this case, it would be a good idea to clear the counters again and keep an eye on the interface. If FEBEs increment regularly, you might want to start troubleshooting further. The show controllers output shows that there are no errors active and no FEAC codes have been received. This information indicates a relatively healthy clear-channel DS3. A known problem with the PA-A3-T3 and NM-1A-T3 modules results in the receiver being too sensitive (see Cisco bug ID CSCds15318). If you're seeing a large number of errors and you have a short cable, this might be the problem. Short of replacing the interface with a different model, Cisco recommends either reducing the transmit level of the de- vice on the other end of the DS3 cable connected to your router, or installing attenuators on the line. These cards are pretty common, SO watch out for this issue. Channelized DS3 A channelized DS3 can be configured for voice, data, or both. Because the DS3 is chan- nelized, individual T1s can be broken out as either data links or voice links. You do this in the controller configuration for the interface. In this example, I've configured the first 10 T1s in the DS3 to be serial data links. this by assigning the desired number of DSOs to a channel group. Because my links will all be full T1s, I'