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Each socket, opened in Online Data Mode, allocates an accumulating buffer whose size is 1372
bytes. When the user sends amount of data, less then the buffer size, the data is being sent to
Network after a spooling timeout (200 mS), otherwise the data is being sent to Network
immediately.
When ODM feature is executed, pseudo-command mode is enabled in PREMUX state and disabled in
MUX state by default (see RS232 Multiplexer Feature). ODM feature allows the user to disable
pseudo-command mode, when SMC modem is in PREMUX state by setting "pseudo-command
mode enable/disable" parameter to "1".Disabled pseudo-command mode provides better data
transfer performance.
When SMC modem is in MUX state and ODM feature executed, a pseudo-command mode is not
supported.
The user can suspend an opened in Online Data Mode socket by entering, for example, ESC
sequence (by default "+++") from terminal, when pseudo-command mode is enabled. In this case
SMC modem switches to pseudo-command mode, allowing the user to enter AT commands from
terminal. The ATO command used to resume Online Data Mode from pseudo-command mode. When
data comes from the Network and SMC modem is in pseudo-command mode, a special unsolicited
event (+MIPDATA) is being sent to terminal.
When socket is in Online Data Mode (not in pseudo-command mode), RS232 communication DCD
line is enabled.
There are two options to suspend a socket, opened in Online Data Mode, when SMC modem is in
PREMUX state:
Enter ESC sequence (―+++‖) from terminal.
Disable DTR line on RS232 communication port in case of AT&D1 parameter configuration.
There are two options for valid closing of a socket, opened in Online Data Mode, when SMC modem
is in PREMUX state:
Switch SMC modem to pseudo-command mode and enter +MIPCLOSE command with opened
in Online Data Mode Socket ID.
Disable DTR line on RS232 communication port in case of A&D2 or AT&D3 parameter
configuration.
When SMC modem is in MUX state, change of DTR or software DTR state on ODM MUX channel
closes ODM session in case of A&D1, A&D2 or AT&D3.
When an error occurred with the socket, opened in Online Data Mode, the socket closes
automatically and +MIPSTAT unsolicited response is being sent to terminal
Содержание SMC-CDMA Series
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