No connectivity - ports up and down?

Question

I have a 2950 switch which we use to for connectivity to VOIP phones and terminals/pcs on the floors. At random times during the day maybe twice 2-3 hour span, we lose connectivity between two of the terminals and our server which is connected to the switch. When I say "lose connectivity" I mean the terminal is unable to reach our server(we have desktop vitalization) that hosts the virtual hosting software. All the terminals have static IP addresses assigned. The ports on the switch show no activity what so ever - at one stage I did see did an amber light blink every 2-3 seconds .This happened on the terminals that could not connect, but that has not repeated itself. Below I have included a sh int of a port that is currently down. The port could be down most of the day and then start working all of a sudden!
I don't know if a problem with the switch or port or communication with the server. Out of all the 12 terminals we have 10 of them have no problem connecting to the server through the same switch. When pinging from my pc to any of the two statically assigned IPs  - host unreachable is returned.
Any help would be appreciated
FastEthernet0/48 is down, line protocol is down (notconnect)
  Hardware is Fast Ethernet, address is 0017.596c.26b0 (bia 0017.596c.26b0)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto-duplex, Auto-speed, media type is 100BaseTX
  input flow-control is unsupported output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 07:54:51, 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: 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
     127223 packets input, 21345203 bytes, 0 no buffer
     Received 1913 broadcasts (0 multicast)
     0 runts, 0 giants, 0 throttles
     15 input errors, 12 CRC, 3 frame, 0 overrun, 0 ignored
     0 watchdog, 459 multicast, 0 pause input
     0 input packets with dribble condition detected
     76367875 packets output, 3852147285 bytes, 0 underruns
     150 output errors, 0 collisions, 2 interface resets
     0 babbles, 150 late collision, 9 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

Answer 1

Collin,
attached is the brief for the port been up...I can see  that it is up and blinking green however on the terminal the screen is  in a "frozen" state. When I rebooted the terminal it is trying to connect to the server - again the port is blinking green.
FastEthernet0/48 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 0017.596c.26b0 (bia 0017.596c.26b0)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 100BaseTX
  input flow-control is unsupported output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:00, 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: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 9000 bits/sec, 12 packets/sec
     127300 packets input, 21363075 bytes, 0 no buffer
     Received 1916 broadcasts (0 multicast)
     0 runts, 0 giants, 0 throttles
     15 input errors, 12 CRC, 3 frame, 0 overrun, 0 ignored
     0 watchdog, 459 multicast, 0 pause input
     0 input packets with dribble condition detected
     76373604 packets output, 3852796867 bytes, 0 underruns
     150 output errors, 0 collisions, 2 interface resets
     0 babbles, 150 late collision, 9 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out