Multitech MMCModem GPRS (MTMMC-G) Manual de usuario descargar pdf (Pagina 14)

Chapter 2 – General Configuration AT Commands

Multi-Tech Systems, Inc. IP Connectivity AT Commands for GPRS-F4 Wireless Modems (PN S000437C) 14

Bearers Handling +WIPBR Continued

Notes:

Starting a Bearer

The mandatory parameters to start a bearer in

• server mode: <cmdtype>, <bid>, <mode>, <login> and <password>

• client mode: <cmdtype>, <bid> and <mode>

Depending on the mode and the bearer type, additional parameters are required or forbidden:

Bid Mode Other Parameters

1,3,11,14,21,24 0 None

1,3,11,14,21,24 1 <PPP login>, <PPP password>

5 0 None

5 1 <login>,<password>[,<caller identity>]

6 0 None

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".

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 43 44

Sin comentarios

Multitech MMCModem GPRS (MTMMC-G) Manual de usuario Pagina 14