please refer to the problem below that I face it in the new WIC that I installed in Router 2811, and let me know how to fix it ?
by the way, the other side of serial cable attached in router 1841, and there is no problem either L1 or L2.
R1#sh ip inter b
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset administratively down down
FastEthernet0/1 unassigned YES unset administratively down down
Serial1/0 10.1.1.1 YES manual up down
Serial1/1 unassigned YES unset administratively down down
Serial1/2 unassigned YES unset administratively down down
Serial1/3 unassigned YES unset administratively down down
R1#sh controllers s1/0
CD2430 Slot 1, Port 0, Controller 0, Channel 0, Revision 19
Channel mode is synchronous serial
idb 0x4687D79C, buffer size 1524,Unknown (85) cable
Global registers
rpilr 0x2, rir 0x0, risr 0x0, rfoc 0x0, rdr 0x0
tpilr 0x1, tir 0x0, tisr 0x68, tftc 0x0, tdr 0x0
mpilr 0x3, mir 0x0, misr 0x40
bercnt 0xFF, stk 0x0
Per-channel registers for channel 0
Option registers
0x02 0x00 0x42 0x67 0x60 0x00 0x00
Command and status registers
cmr 0xC0, ccr 0x00, csr 0x8C, msvr-rts 0xE1, msvr-dtr 0xE1
Clock option registers
rcor 0x80, rbpr 0x81, tcor 0x00, tbpr 0x81
Interrupt registers
ier 0x89, livr 0x00, licr 0x00
DMA buffer status 0x20
DMA receive registers
arbaddr 0xF6F6F04, arbcnt 1548, arbsts 0x1
brbaddr 0xF6F6884, brbcnt 1548, brbsts 0x1
rcbaddr 0x0
DMA transmit registers
atbaddr 0xF70A414, atbcnt 24, atbsts 0x62
btbaddr 0xF70A554, btbcnt 24, btbsts 0x62
tcbaddr 0xF70A56C
Special character registers
schr1 0x00, schr2 0x00, schr3 0x00, schr4 0x00
scrl 0x0, scrh 0x0, lnxt 0xE1
Driver context information
Context structure 0x4687F974, Register table 0xB9800400
Serial Interface Control 5:1 Register (0xB9800802) is 0x80
Adaptor Flags 0x0
Serial Modem Control Register (0xB9800804) is 0x1D
Receive static buffer 0x46880E40
Receive particle buffers 0x4687FFC0, 0x4687FF80
Transmit DMA buffers 0x0, 0x0, 0x0, 0x0
Transmit packet with particles 0x0, first word is 0x0
Interrupt rates (per second) transmit 0, receive 0, modem 0
True fast-switched packets 0
Semi fast-switched packets 0
Transmitter hang count 0
Residual indication count 0
Bus error count 0
Aborted short frames count 0
CRC short frames count 0
Tx DMA low threshold count 0
Error counters
CTS deassertion failures 0
Nested interrupt errors transmit 0, receive 0, modem 0
R1#sh inter s1/0
Serial1/0 is up, line protocol is down
Hardware is CD2430 in sync mode
MTU 1500 bytes, BW 128 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input never, output 00:00:02, output hang never
Last clearing of "show interface" counters 03:00:30
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
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 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
14 packets output, 623 bytes, 0 underruns
0 output errors, 0 collisions, 26 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
19 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
