Westermo GDW-11 - Manual (Page 84)

84 Short Messages commands 6615-2220
+CNMA – New Message Acknowledgement
Description:
This command allows reception of a new message routed directly to the TE to be
acknowledged.
In TEXT mode, only positive acknowledgement to the network (RP-ACK) is possible.
In PDU mode, either positive (RP-ACK) or negative (RP-ERROR) acknowledgement to
the network is possible.
Acknowledge with +CNMA is possible only if the +CSMS parameter is set to 1
(+CSMS=1) when a +CMT or +CDS indication is shown (see +CNMI command).
If no acknowledgement is given within the network timeout, an RP-ERROR is sent to the
network, the <mt> and <ds> parameters of the +CNMI command are then reset to zero
(do not show new message indication).
Syntax:
In text mode: AT+CNMA
In PDU mode: AT+CNMA [ = <n> [ , <length> [ <CR>
PDU is entered <ctrl-Z / ESC> ] ] ]
NOTE:
PDU is entered using <ackpdu> format instead of <pdu> format (e.g.. SMSC address field
is not present).
Parameters:
<n>
Type of acknowledgement in PDU mode
0: send RP-ACK without PDU (same as TEXT mode)
1: send RP-ACK with optional PDU message
2: send RP-ERROR with optional PDU message
<length>
Length of the PDU message
NOTE:
Please refer to GSM 03.40 Recommendation for other PDU negative acknowledgement
codes.