5. Data - CSD/HSCSD
Note! Since the modem does not support V42bis compression the following commands have not been implemented:
•AT+DS
•AT+DR
5.1 AT+CBST | Select Bearer Service Type |
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| Description | Command | Possible Responses | |
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| Select bearer service | AT+CBST=[<speed>, | • | OK |
| type | [<name>,[<ce>]]] | • | ERROR |
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| Read the command | AT+CBST? | • +CBST: | |
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| <speed>,<name>, |
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| <ce> |
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| • OK | |
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| • ERROR | |
| Test if the command is | AT+CBST=? | • +CBST: (list of supported | |
| supported |
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| <speed>s,list of |
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| supported <name>s, list |
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| of supported <ce>s) |
• OK
• ERROR
Selects the bearer service <name> with data rate <speed>, and the connection element <ce> to be used when data calls are originated. Values may also be used during mobile terminated data call setup, especially in the case of single numbering scheme calls.
Test command returns values supported by the TA as compound values.
<speed> | Description |
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0 | Auto selection of baud rate |
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4 | 2400bps V.22bis |
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6 | 4800bps V.32 |
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7 | 9600bps V.32 |
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12 | 9600bps V.34 |
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15 | 19200bps V.34 |
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68 | 2400bps V.110 (ISDN) |
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70 | 4800bps V.110 (ISDN) |
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LZT 123 7361 R1A
