Dear Team,                 My cisco router 1841 is working fine but showing DSR=down and   CTS=down why?   RRBMeerut_Bhojpur> RRBMeerut_Bhojpur> RRBMeerut_Bhojpur>sh int se0/0/0 Serial0/0/0 is up, line protocol is up  Hardware is GT96K Serial  Internet address is 10.17.221.18/30  MTU 1500 bytes, BW 64 Kbit/sec, DLY 20000 usec,   reliability 255/255, txload 15/255, rxload 35/255  Encapsulation HDLC, loopback not set   Keepalive set (10 sec)   Last input 00:00:00, output 00:00:00, output hang never   Last clearing of "show interface" counters never   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  0/5/256 (active/max active/max total)   Reserved Conversations 0/0 (allocated/max allocated)    Available Bandwidth 48 kilobits/sec   5 minute input rate 9000 bits/sec, 7 packets/sec   5 minute output rate 4000 bits/sec, 6 packets/sec   38866 packets input, 5642586 bytes, 0 no buffer    Received 1525 broadcasts, 0 runts, 0 giants, 0 throttles    814 input errors, 812 CRC, 639 frame, 614 overrun, 0 ignored, 477 abort    42349 packets output, 4290868 bytes, 0 underruns    0 output errors, 0 collisions, 4 interface resets  0 unknown protocol drops    0 output buffer failures, 0 output buffers swapped out    2 carrier transitions   DCD=up     DSR=down    DTR=up   RTS=up   CTS=down       RRBMeerut_Bhojpur> ... View more