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No. 519 EZL70 in ATC(1) TCP-Connection not runs 2009-07-23

additional to my request 517 (one week ago)
now I tried to connect the EZL via ATC-mode to a apach-server in the same network area with following result:
After I put the ATDT-command via RS232 to the EZL it aswered "NO CARRIER".
Then I sniffs the TCP messages with the
ethereal-tool on the server side:
the 1. TCP-step, request from EZL:
IP, Port all OK SYN=1
the 2. TCP-step, respons from apach:
same all OK ACK=1/SYN=1
ACK-No.=1
but in the 3. Tcp-step from EZL:
ACK=1/RST=1 and ACK-No.=3501708736

then the EZL sends a 4. message with
ACK=1/RST=1 and ACK-No.=1

result is: not connected

The same result I get if I try to connect to an external server. The ethereal-sniff shows for the 1. and 3. TCP-steps the same.

In COD-mode with fixed peer-IP in the EZL the connection is established well.
But I can not change the peer-IP via serial.

I hope you can help me

Writer Altmann Company