Filter
Top Products
References DART 300 Modem
Page 100 2110212 Rev 1.0
Table 12-1: AT Commands in CDPD Mode (continued)
Command Description
E[n]
Echo (Command State)
Controls echoing of characters from the host (DTE) back to the host when the modem is in
command state. This will also affect framing of responses. See Section 4.3.3 for details.
Value Setting
0 Disable echo.
1 Enable echo. (Default)
H[n]
Hook Control
In CDPD mode, this means, “close the current session”. The NEI will be de-registered from the
CDPD network if +WS173=0 (manual registration). Data Carrier Detect (DCD) is turned off in
any case.
Value Setting
0 If +WS173=0 (manual registration), de-register the current NEI and turn off DCD.
If +WS173=1 (auto registration) the modem will turn off DCD but will remain
registered. This is used for ending server sessions.
1 De-register the current NEI and turn off DCD.
NOTE that using H1 will de-register even if the modem is set to auto-register. The modem will
not attempt to re-register until auto-registration is reset with +WS173=1 or the modem is reset.
See the note in Section 7.3.3.1 for details.
When using UDP packet service, data in the modem’s internal transmission buffers, can be lost if
de-registration occurs. The user should allow sufficient time for transmission between forwarding
the last packet and closing the session. A preferred technique is to implement an application level
protocol to have data transmissions acknowledged or timed-out before closing a session.
I[n]
Identification/Checksum Command
Returns information about the modem.
Value Response Meaning
3 Sierra Wireless Inc. SB300 Make and model
4 999007x Product code
5 Rn-n-n d:/filespec yyyy/mm/dd hh:mm:ss
Control firmware revision
6 xxxxxxx xxxx Revision code
7 xxxxxx Feature Option Code (see below)
9 Sierra Wireless AirCard Product
The Feature Options reported by ATI7 is a string of characters with these meanings:
C CDPD packet mode capable (+WS46=4)
B AirBooster 350 RF amplifier is supported
T Temperature of radio can be queried.
O
On-line
Causes the modem to go from command state to data state with the PAD service mode determined
by +WS45 (Packet Service). The previously determined IP address and port (if in a PAD service)
are used. See D (Dial) for setting the destination IP address and port.
Any parameter value is ignored.
Result Codes:
CONNECT