关于CISCO ROUTER 端口信息的察看

请大家通过下列信息说明此链路存在哪些问题？


show interfaces serial 0/2/0:0
Serial0/2/0:0 is up, line protocol is up
  Hardware is GT96K Serial
  Internet address is 10.232.239.74/30
  MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,
     reliability 166/255, txload 1/255, rxload 1/255
  Encapsulation PPP, LCP Open
  Open: CDPCP, IPCP, loopback not set
  Keepalive set (10 sec)
  Last input 00:00:08, output 00:00:08, output hang never
  Last clearing of "show interface" counters 00:08:28
  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  0/1/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1536 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     125 packets input, 2566 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     87106 input errors, 87106 CRC, 17355 frame, 3 overrun, 0 ignored, 1247 abort
     128 packets output, 2790 bytes, 0 underruns
     0 output errors, 0 collisions, 6 interface resets
     0 output buffer failures, 0 output buffers swapped out
     1 carrier transitions
  Timeslot(s) Used: UNFRAMED, SCC: 0, Transmitter delay is 0 flags

show controllers e1
E1 0/2/0 is up.
  Applique type is Channelized E1 - balanced
  Description: csxj_zhongxing E1
  No alarms detected.
  alarm-trigger is not set
  Version info Firmware: 20050620, FPGA: 16, spm_count = 0
  Framing is UNFRAMED, Line Code is HDB3, Clock Source is Line.
  CRC Threshold is 320. Reported from firmware  is 320.
  Data in current interval (406 seconds elapsed):
     79515 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 211 Line Err Secs, 4 Degraded Mins
     211 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 390 Unavail Secs