Troubleshooting - Huawei MU609 Application Manual

HUAWEI MU609 HSPA LGA Module
Application Guide
^IPOPEN:
1,"TCP",5500,"172.22.44.33",5000,3,0
OK
^IPOPEN:
2,"TCP",5600,"172.22.44.33",80,3,0
OK
Notes:

5.3.2 Troubleshooting

Scenario
AT^IPOPEN=1,"TCP"
,"172.22.44.33",5000
AT^IPOPEN=1,"TCP"
,"172.22.44.33",5000
AT^IPOPEN=1,"TCP"
,"172.22.44.33",5000,
5000
AT^IPOPEN?
Issue 02 (2013-09-18)
 When creating a listen server, the local port number can be ignored. If the port number is
ignored, the module will randomly assign a local port number.
 When creating a TCP link, ensure that the remote server has been started.
 The maximum segment size (MSS) for creating TCP links is 1220 bytes. Data larger than
the MSS will be segmented into several packets.
Possible Error
Information
+CME ERROR: The
network has not been
opened yet
+CME ERROR: The link
has been established
already
+CME ERROR: Fail to
bind the specified port
OK
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Internal Protocol Stack Application Scenarios
Solution
Initialize the internal protocol
stack before sending the
command to create the link.
Run ^IPCLOSE to close the
corresponding link.
Alternatively, change the link
ID and send the command to
create the link.
Change the local port
number, or leave the local
port number blank.
No link information is
available. Create a link, or
accept the link as a server,
and then query the link
information again.
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