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DCD=up DSR=up DTR=up RTS=up CTS=down

Serial2/1 is up, line protocol is down

Hardware is M4T

Internet address is

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,

reliability 128/255, txload 1/255, rxload 1/255

Encapsulation HDLC, crc 16, loopback not set

Keepalive set (10 sec)

Restart-Delay is 0 secs

Last input never, output 00:00:09, output hang never

Last clearing of "show interface" counters 00:27:30

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/2/256 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 1158 kilobits/sec

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

0 packets input, 0 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

3040471 input errors, 3040414 CRC, 0 frame, 0 overrun, 0 ignored, 57 abort

165 packets output, 3960 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=down


Re: DCD=up DSR=up DTR=up RTS=up CTS=down

Since CTS= Down, there are two things you should look at :

- CSU/DSU is set up properly for the right time slots

- Carrier wiring problem is proper

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