Protocol\GSM
The Protocol\GSM INF file entries enable the corresponding protocol to be selected in the user interface under Data Connection Preferences. The protocol is also indicated through TAPI and Unimodem. GSM supports many logical protocols.
The major protocol classes are:
Analog, which connects to a remote PSTN voice-band modem through a modem in a pool in the GSM network provider facilities. Examples of analog protocols include: V.90, V.34, and V.32bis.
V.110 and V.120, which connects to a remote ISDN DCE by way of V.110 or V.120 provided by a GSM network provider.
HDLC PPP, which connects to the Internet through a GSM network provider.
Starting with Windows 2000, users and communications applications (for example, RAS) can select protocols dynamically.
When a given protocol is selected in the user interface, Unimodem will issue the corresponding AT commands before originating a call as part of a sequence of commands that set response format and presentation, carrier-detect on, and so forth.
This entry does not set a direct mode. The rate is the DCE-DCE rate, not the DTE-DCE rate.
Format
GSM Protocol registry entries have the following form:
Examples
The following example selects a V-series PSTN modem with Radio Link Protocol on:
HKR, Protocol\GSM\ANALOG_RLP, 1,,"AT+CBST=0,,1<cr>"
Remarks
The following notes are keyed to the preceding table:
It is also recommended that autobauding be enabled for RLP connections as specified in ETSI/GSM 07.07.
Direct-mode V.110 connections are not supported a variable DCE speed (for example, 1200 bps) and a DTE speed of 115200 bps should be established.
The following table lists the GSM protocols, the entries, sample command strings, and notes.
| Protocol Type | <protocol_type> Entry | Sample Commands |
|---|---|---|
V-series PSTN modem, with Radio Link Protocol ON |
ANALOG_RLP Note: See ETSI/GSM 7.07 for RLP and +CBST commands, see Note 1. |
AT+CBST=0,,1<cr> |
V-series PSTN modem, with Radio Link Protocol OFF |
ANALOG_NRLP Note: See ETSI/GSM 7.07 for RLP and +CBST commands, see Note 1. |
AT+CBST=7,,0<cr> |
V.110, 1.2kbps |
V110_1DOT2K Note: See Note 2. |
AT+CBST=66,,<cr> |
V.110, 2.4kbps |
V110_2DOT4K Note: See Note 2. |
AT+CBST=68,,<cr> |
V.110, 4.8kbps |
V110_4DOT8K Note: See Note 2. |
AT+CBST=70,,<cr> |
V.110, 9.6kbps |
V110_9DOT6K Note: See Note 2. |
AT+CBST=71,,<cr> |
V.110, 14.4kbps |
V110_14DOT4K Note: See Note 2. |
AT+CBST=75,,<cr> |
V.110, 19.2kbps |
V110_19DOT2K Note: See Note 2. |
AT+CBST=79,,<cr> |
V.110, 28.8kbps |
V110_28DOT8K Note: See Note 2. |
AT+CBST=80,,<cr> |
V.110, 38.4kbps |
V110_38DOT4K Note: See Note 2. |
AT+CBST=81,,<cr> |
V.120, 56kbps |
V120_56K |
AT+CBST=51,,<cr> |
HDLC PPP, 56kbps |
HDLC_PPP_56K Note: RFC 1662. |
AT+CBST=115,,<cr> |
HDLC PPP, 64kbps |
HDLC_PPP_64K Note: RFC 1662. |
AT+CBST=116,,<cr> |
General Packet Radio Service (GPRS) |
GPRS |
AT<cr> |