Есть сервер доступа с 4 E1.
Через неопределенное время, уменьшается кол-во доступных модемов.
При show interface эти модемы выгдядят так:

Async2/24 is down, line protocol is down
  modem(slot/port)=2/24, state=IDLE
  dsx1(slot/unit/channel)=NONE, status=VDEV_STATUS_BAD.
  Hardware is Async Serial
  Interface is unnumbered. Using address of Loopback1
  MTU 1500 bytes, BW 115 Kbit, DLY 100000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation PPP, loopback not set
  Keepalive set (60 sec)
  DTR is pulsed for 5 seconds on reset
  LCP Closed
  Closed: IPCP
  Last input 10:35:50, output 10:35:50, output hang never
  Last clearing of "show interface" counters 2d03h
  Input queue: 0/10/0/0 (size/max/drops/flushes); Total output drops: 87
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/46 (size/max total/threshold/drops)
     Conversations  0/27/32 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 86 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     286618 packets input, 31793421 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 1 giants, 0 throttles
     0 input errors, 398 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     224097 packets output, 167908100 bytes, 0 underruns
     0 output errors, 0 collisions, 82 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions

При перезагрузке, все приходит в норму, но через 1-2 дня модемы опять начинают "падать".

Помогите разобраться с проблемой !