Comtrol AT Commands - Manual (Page 24)

AT Commands for CX81801/CX06833/CX81300/CX06827 Modems Reference Manual
Conexant 102184B
2-10
Result Code Types. There are three types of result codes: final, intermediate, and
unsolicited. Result codes are described in Section 3.4.
1. A final result code indicates the completion of a full modem action and a ability to
accept new commands from the DTE.
2. An intermediate result code is a report of the progress of an modem action. The
CONNECT result code is an intermediate result code. In the case of a dialing or
answering command, the modem switches from command state to online data state,
and issues a CONNECT result code. This is an intermediate result code for the
modem because it cannot accept commands from the DTE while in online data state.
When the modem switches back to the command state it then issues a final result
code (such as OK or NO CARRIER).
3. Unsolicited result codes (such as RING) indicate the occurrence of an event not
directly associated with the issuance of a command from the DTE.
2.7.2 Extended Syntax Result Codes
Extended syntax result codes may be issued in response to either basic or extended
commands, or both. The appropriate responses are specified in the definitions of the
commands, the responses, or both.
The general format of extended syntax result codes is the same as result codes defined in
TIA-602 with regard to headers and trailers. The characters specified in S-parameters S3
and S4 are used in headers and trailers of extended syntax result codes as they are in
basic format result codes. The setting of the V command affects the headers and trailers
associated with extended syntax result codes in the same manner as basic format result
codes; however, unlike basic format result codes, extended syntax result codes have no
numeric equivalent, and are always issued in alphabetic form.
Extended syntax result codes are subject to suppression by the Q1 command, as with
basic format result codes. The issuance of extended syntax result codes are not be
affected by the setting of the X command.
Extended syntax result codes may be either final, intermediate, or unsolicited; the type
being indicated in the definition of the result code.
Extended syntax result codes are prefixed by the "+" character to avoid duplication of
basic format result codes specified in TIA-602. Following the "+" character, the name of
the result code appears; result code names follow the same rules as command names.
Extended syntax result codes may include the reporting of values. The definition of the
result code specifies whether or not values are appended to the result code, and, if so,
how many, their types, and their assumed default values if omitted.
Data/voice Modes. When no values are to be reported, the result code appears in the
simplest form:
+<name>
If a single value is to be reported, the form of the result code is:
+<name>: <value>
A single space character separates the colon character from the <value>; no space
appears between the result code name and the colon. If multiple values are to be reported
with the result code, the form is:
+<name>: <compound_value>