Multitech MTMMC-G-F4 Reference Manual page 17

Notes:
Starting a Bearer
The mandatory parameters to start a bearer in
•
server mode:
•
client mode:
Depending on the mode and the bearer type, additional parameters are required or forbidden:
Bid
1,3,11,14,21,24
1,3,11,14,21,24
5
5
6
Starting bearer as a server requires additional parameters as mentioned in the above table.
•
For PPP server, only parameters <login> and <password> are required. They will be
compared with remote PPP client login and password.
•
For GSM server, <login> and <password> will be used for PPP over GSM establishment
(same behavior as described for PPP server).
The <caller identity> is an optional ASCII string (type ASCII*). If not specified, then target will accept
all DATA calls (independently of caller identification). If specified, then target will only accept calls
from <caller identity> (which is the GSM data call number of the GSM client.
Opening bearer only consists in associating the IP protocol stack with the specified bearer. The
corresponding bearer setup has to be done through the adequate already existing AT commands
(please refer to +WMFM commands for UART1 and UART2, +CMUX command for CMUX virtual
ports and GSM/GPRS AT commands).
Several bearers can be opened at the same time but only one bearer can be started at a time.
If both DNS1 and DNS2 are displayed as "0.0.0.0" in the unsolicited message when bearer is opened
in server mode, it means that connecting to a remote IP host through an URL will fail.
The options WIP_BOPT_DIAL_REDIALCOUNT and WIP_BOPT_DIAL_REDIALDELAY will not be
implemented through AT commands. Nevertheless, for future compatibility reason, Opt num 3 and 4
are kept as reserved.
For GSM bearer, the options WIP_BOPT_IP_ADDR and WIP_BOPT_IP_DST_ADDR will display
valid addresses only when the bearer is started and connected; otherwise, it will display an address
"0.0.0.0".
Multi-Tech Systems, Inc. IP Connectivity AT Commands for GPRS-F4 Wireless Modems (PN S000437E)
<cmdtype>, <bid>, <mode>, <login> and <password>
<cmdtype>, <bid> and <mode>
Mode Other Parameters
0 None
1 <PPP login>, <PPP password>
0 None
1 <login>,<password>[,<caller identity>]
0 None
Chapter 2 – General Configuration AT Commands
Bearers Handling +WIPBR Continued
17