NAL RESEARCH CORPORATION A3LA-RG, Общее описание устройства

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NAL Research Corporation (451-93156-009A)
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The {2-byte message length} field represents the length, in bytes, of the SBD
message not including the length field or the mandatory two-byte checksum.
The high order byte will be sent first.
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The maximum mobile terminated SBD message length is 1890 bytes.
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The checksum is the least significant 2-bytes of the summation of the entire
SBD message. The high order byte will be sent first. For example if the A3LA-
RG were to send the word “hello” encoded in ASCII to the DTE the binary
stream would be hex 00 05 68 65 6c 6c 6f 02 14.
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If there is no mobile terminated SBD message waiting to be retrieved from the
A3LA-RG, the message length and checksum fields will be zero.
 The mobile terminated message buffer will be empty upon power-up.
Command Response:
There are no response codes generated by the A3LA-RG for this command.
A.8.87 +SBDRT – Short Burst Data: Read Text Message
Exec Command: +SBDRT
This command is used to transfer a text SBD message from the single mobile terminated buffer
in the A3LA-RG to the DTE. This command is similar to +SBDRB but does not provide a length
indicator or checksum. The intent of this command is to provide a human friendly interface to
SBD for demonstrations and application development. It is expected that most usage of SBD
will be with binary messages.
 Once the command is entered, the SBD message in the mobile terminated buffer is
sent out of the port.
 This command is similar to +SBDRB except no length or checksum will be provided.
 The maximum mobile terminated SBD message length is 1890 bytes.
 The mobile terminated message buffer will be empty upon power-up.
Command Response: +SBDRT: <CR> {mobile terminated buffer}
A.8.88 +SBDD – Short Burst Data: Clear SBD Message Buffer(s)
Exec Command: +SBDD[<Delete type>]
This command is used to clear the mobile originated buffer, mobile terminated buffer or both.
 The <Delete type> parameter identifies which buffers are cleared.
0: Clear the mobile originated buffer
1: Clear the mobile terminated buffer
2: Clear both the mobile originated and mobile terminated buffers
 Using this command or power cycling the phone are the only means by which both
buffers are cleared.
 The mobile terminated buffer will be cleared when an SBD session is initiated.
 Sending a message from the A3LA-RG to the ESS does not clear the mobile originated
buffer.
 Reading a message from the A3LA-RG does not clear the mobile terminated buffer.
Command Response: