BRC Remote User Interface

Command Set
When in BRC state, the set of commands available to the host user is the same as for the remote user in the online command state. If they are blocked to the target user while in the online state then they are blocked to the host user in BRC. Binding time is also handled the same. If a command is accepted but takes effect at the next call, it works the same in BRC.

Some commands such as Hn - Control The Switchhook or On - Go Online Command when issued remotely, have additional behavior characteristics for BRC as noted in the transitions section.


Command Prefix
In BRC state, the concept of AutoSpeed and AutoParity is suspended for two reasons:

1. The host user cannot change the speed of the link, which is in effect a fixed-speed interface.
2. It is not desirable to always override the remote user speed and parity defaults. The commands given by the host user do not affect the speed or parity of the target modem automatically. The Last AT speed and parity entered by the remote user (if any, else NVM default) are used during BRC.
Although the last AT speed and parity are used, the leading AT or at prefix is still required in BRC state. The A/ repeat is not supported. The BRC command process confirms a leading AT or at then begins in the editing state with an empty command line buffer.If the leading AT is missing, everything up to the next AT, at, or carriage return is discarded.Command strings are entered (and edited with BS) and terminated with an ASCII &ltCR> character (dec 13, hex 0D). As an implementation option ^X may be used to abort a partially entered command line. If ^X is supported, and is detected, the command line is cleared, and the empty command line is executed as-if a&ltCR>had been entered. This results in an OK result code.

Result Codes
Result codes are formatted according to the current target modem settings. Unsolicited result codes are permitted.

Feature ID
In addition to the extended command syntax inquiry method, the DTE may use the I4 ID command to confirm support for the BRC feature. Add I4 a-string digit 19 bit weight 0 = 1 means BRC is supported.

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