Digi XBee Cellular LTE Cat 1, User Manual, Page: 65 / 91

AT commands Diagnostic interface commands
Digi XBee Cellular LTE Cat 1 Embedded Modem User Guide 65
CI (Protocol/Connection Indication)
Displays information regarding the last IP connection (when the IP command = 0, 1 or 4) or SMS
transmission (when IP = 2).
The value for this parameter resets to 0xFF when the device switches between IP (IP Protocol)
modes.
When IP is set to 0 , 1 , or 4 (UDP, TCP, over SSL over TCP), CI resets to 0xFF when you apply changes to
any of the following settings:
n
DL (Destination Address)
n
DE (Destination Port)
n
TM (TCP Client Connection Timeout)
When IP is set to 2 (SMS), CI resets to 0xFF when P# (Destination Phone Number) is changed.
The following table provides the parameter's meaning when IP = 0 for UDP connections.
Parameter Description
0x00 The socket is open.
0x01 Tried to send but could not.
0x02 Invalid parameters (bad IP/host).
0x03 TCP not supported on this cellular component.
0x10 Not registered to the cell network.
0x11 Cellular component not identified yet.
0x12 DNS query lookup failure.
0x20 Bad handle.
0x21 User closed.
0x22 Unknown server - DNS lookup failed .
0x23 Connection lost.
0x24 Unknown.
0xFF No known status.
The following table provides the parameter's meaning when IP = 1 or 4 for TCP connections.
Parameter Description
0x00 The socket is open.
0x01 Tried to send but could not.
0x02 Invalid parameters (bad IP/host).
0x03 TCP not supported on this cellular component.