CAUTION:
If the timer is set to 0, and a manual registration (AT\R1) is tried and fails to complete, the registration attempt never times out. The DART requires a power cycle to clear this condition.
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NOTE:
This function was conceived by the CDPD specification writers when it was anticipated that some carriers would charge for the time an M-ES was registered on the network. However, since no carriers plan on charging for registration time this feature is of little practical use.
In addition, this option slows down operations and generates extra traffic by requiring registration protocol to be executed by the modem every time a Dial or a Hang-up command is issued.
Auto-Registration when not registered
This function is the same as Auto-Registration at power-on, except that in addition to executing AT\R4 command, the timer value is set to zero. This causes the modem to auto register at power-on, and also when it loses registration. Setting S-Register 13 to zero with an ATS13 = 0 command suppresses the time-out function, and causes the registration attempt to go on until it is successful.
This type of registration does not block the AT command interface so other commands can be executed when auto-registration is in progress. After making and saving this setting with an AT&W, power cycle or restart the DART 200 by an AT-Rto activate the function.
Auto-Registration/De-Registration at connection/disconnection
This function minimizes the time a modem is registered on the network by linking registration to connection establishment and de-registration to connection hang-up. This option can only be used with protocols that establish point-to-point sessions, such as TCP and telnet, and then only with client systems; a server must always be registered for connection requests to be directed to it.
This feature is activated by the AT\R2 command which turns on bit 4 (value = 16) of S-Register 57, and must be followed by an AT&W command to save the setting. This feature can be deactivated by the AT\R3 command.
Deregistration
The DART 200 can be de-registered at any time by executing the AT\R0 command; however, doing this deactivates the auto-registration feature of the AT\R4 command until the modem is power cycled, or restarted with an AT-Rcommand.
Data forwarding
Data forwarding is the process that causes data sent from the MAS (remote terminal) to the DART 200 to transmit over the CDPD network. Data forwarding is operational only in TCP, UDP, and telnet modes.
