COM-5001 LAN Network Interface 
  -> COM-7001 Turbo code encoder 
    -> COM-7001 Turbo code decoder 
      -> COM-5001 LAN Network Interface 
 
This assembly allows users to send asynchronous text data from a network TCP-IP socket, 
convert the data to a synchronous serial data stream (using HDLC),
protect the data stream from errors during transmission using Turbo Product Code
FEC encoder and decoder, then restore the data stream and forward it to another
network TCP-IP socket.

Transmit socket address 172.16.1.128, port 1024.
Receive socket address 172.16.1.128, port 1026.
Coded data rate over synchronous serial link: 100 Kbit/s.
FEC: 2D (32,26)x(32,26). 
FEC rate: 0.66

a) power up the assembly. Connect a serial connection between the first COM-5001 module
and a host computer. Using the ComBlock Control Center File | Import menu, import the
5001_7001_7001_5001.stn configuration. 
Connect each COM-5001 to the network via a network hub. 

b) Change the IP addresses of each COM-5001 module in accordance with the network rules.
The IP address is stored at registers REG0/1/2/3. The IP mask is stored at REG4/5/6/7.
Ask your network administrator about available addresses to avoid conflicts.
After configuring the IP addresses, recycle power.

c) From a remote computer, start the "Hyperterminal" program (usually found in Windows | Programs
| Accessories | Communication). Connect to TCP-IP socket 172.16.1.128 (or alternative address
entered in b)) port 1024. The program should show the "Connected" status in a window corner.
This program is now capable of sending data.

d) Start another "Hyperterminal" program from the same or from another computer.
This time, connect to TCP-IP socket 172.16.1.129 (or alternative address
entered in b)) port 1026. The program should show the "Connected" status in a window corner
This program is now capable of receiving data.

e) Using first Hyperterminal window, send a large ASCII text file using the 
Transfer | Send text file menu. 
Verify that the file will appear error-free in the other Hyperterminal window 
with a 4Kbit delay. Up to 4 Kbit of data can get temporarily stored in the HDLC elastic
buffer.

f) From the ComBlock control center, verify that the number of transmitted bits is consistent
with the number of bits received (COM-5001 status)

g) Verify that the COM-7001 decoder status indicates no error: 
REG13/14 = 0, meaning no bit error detected in the frame preamble
REG15/16 = 0, meaning no error was corrected by the decoder.