I changed routers and same problem
Router2 - DTE Side of cable
interface Serial1/1
ip address 155.1.0.1 255.255.255.252
R2#show controllers serial 1/1
CD2430 Slot 1, Port 1, Controller 0, Channel 1, Revision 19
Channel mode is synchronous serial
idb 0x84D45D08, buffer size 1524, V.35 DTE cable
Global registers
rpilr 0x2, rir 0x0, risr 0x0, rfoc 0x0, rdr 0x0
tpilr 0x1, tir 0x0, tisr 0x0, tftc 0x0, tdr 0x2
mpilr 0x3, mir 0x0, misr 0x0
bercnt 0xFF, stk 0x0
Per-channel registers for channel 1
Option registers
0x02 0x00 0x42 0xE7 0xE0 0x00 0x00
Command and status registers
cmr 0xC0, ccr 0x00, csr 0xC8, msvr-rts 0x11, msvr-dtr 0x11
Clock option registers
rcor 0x86, rbpr 0x01, tcor 0xC8, tbpr 0x01
Interrupt registers
ier 0x89, livr 0x04, licr 0x04
DMA buffer status 0x00
DMA receive registers
arbaddr 0x79C5024, arbcnt 1548, arbsts 0x1
brbaddr 0x79C56A4, brbcnt 1548, brbsts 0x1
rcbaddr 0x0
DMA transmit registers
atbaddr 0x0, atbcnt 0, atbsts 0x0
btbaddr 0x0, btbcnt 0, btbsts 0x0
tcbaddr 0x0
Special character registers
schr1 0x00, schr2 0x00, schr3 0x00, schr4 0x00
scrl 0x0, scrh 0x0, lnxt 0x11
Driver context information
Context structure 0x88141870, Register table 0x40800400
Serial Interface Control 5:1 Register (0x40800806) is 0x0
Adaptor Flags 0x0
Serial Modem Control Register (0x40800808) is 0x18
Receive static buffer 0x880DDFFC
Receive particle buffers 0x84D47880, 0x84D478C0
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
R2#show int serial 1/1
Serial1/1 is down, line protocol is down
Hardware is CD2430 in sync mode
Internet address is 155.1.0.1/30
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 never, 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 0/0/32 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 96 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
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 40 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=down DSR=down DTR=up RTS=up CTS=down
