Dear All：
Our company has a Cisco 3600 with NM-2CE1U，and Cisco 2600 with WIC-1T.There is a connecting problem below：
1.Serial2/1:1 is reset, line protocol is down
2.E1 2/1 is down
How do I slove these two problems?
3600#show interfaces serial 2/1:1
Serial2/1:1 is reset, line protocol is down
Hardware is DSX1
Description: connect to hualilu with Yingtong 2M
Internet address is 10.18.252.25/30
MTU 1500 bytes, BW 1984 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:02:24, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/4636/0 (size/max/drops/flushes); Total output drops: 7910
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/0/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
831 packets input, 19944 bytes, 0 no buffer
Received 831 broadcasts, 0 runts, 0 giants, 0 throttles
4636 input errors, 3818 CRC, 818 frame, 0 overrun, 0 ignored, 77 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 1978 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
Timeslot(s) Used:1-31, Transmitter delay is 0 flags
3600#show controllers e1 2/1
E1 2/1 is down.
Applique type is Channelized E1 - unbalanced
Transmitter is sending remote alarm.
Receiver has loss of frame.
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
Data in current interval (452 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 452 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 452 Unavail Secs
Total Data (last 24 hours)
1634 Line Code Violations, 0 Path Code Violations,
0 Slip Secs, 86400 Fr Loss Secs, 5 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 5 Severely Err Secs, 86395 Unavail Secs
