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XStream‐PKG‐T™TelephoneRFModem–ProductManualv5.x00[2006.02.24]

Send AT Commands:

When using the “Terminal” tab of the X-CTU Software, send AT Commands and parameters using

the syntax shown below:

Figure3‐03. SyntaxforsendingTelephoneModuleATCommands:

The Telephone Modem ignores spaces, parenthesis and quotation marks in a command string.

To read a parameter value stored in a register, type a question mark “?” after the command line.

Aborting Commands. Some commands that require time to execute may be aborted during

operation. A single character may be sent to the module to abort the currently executing

command.

Disconnecting a Call. Below are four methods that can be used to disconnect a call:

1. Resetting the Telephone Module’s power (by pressing the “Reset Switch” of the RF Modem

[Figure 1-03c]) will disconnect and put the module back to the OFF line state.

2. A remote device can also cause the telephone module to disconnect. If the remote RF

modem disconnects, the local telephone module will automatically sense the loss of the

carrier signal, then return to the OFF line state.

3. “ATH” or “ATZ” commands can also be used to disconnect a call. In order to issue a

command to the Telephone Module when it is On line, the module must be placed into the

“On Line Command State”.

This is accomplished by issuing a special escape sequence. The default value of this three

digit escape sequence is the “+” character [S-Parameter “S2”]. The “+++” is guarded by a

1-second delay before and after it is sent [S-Parameter “S12”]. When the module detects the

escape sequence, the “OK” result will be displayed and the module will enter the On Line

Command State. The “ATH” or “ATZ” commands can now be issued to disconnect the call.

4. If I/O line passing is enabled, a DTR drop will cause the modem to disconnect.

System Response

Command Echo. The Telephone Module may echo characters (default state). The echo can be

turned off or on using the “E” command as described in

Table 3-02.

The modem will issue basic codes in response to processing an AT Command. Result codes may

be displayed either in word (V1) or numeric (V0) format using the Vn command. The Qn

command controls if result codes are issued (Q0) or not issued (Q1).

Table3‐01. BasicResultCodes

Numeric Word Description

0 OK Modem has received and acknowledged the command

1 CONNECT Connection made at 300 bps or extended result codes are off (X0)

2 RING An incoming ring signal has been detected

3 NO CARRIER Reflects that either an intended disconnect or a failure to complete a connection

4 ERROR Indicates an invalid command was issued to the modem

5 CONNECT 1200 Indicates 1200 bps line or DTE connection (see Wn command)

6 NO DIALTONE Modem cannot detect a dial tone

7 BUSY Modem has detected a busy tone

8 NO ANSWER After S7 time has elapsed, the remote device did not answer

10 CONNECT 2400 Line speed or DTE connection at 2400 bps

12 CONNECT 9600 Line speed or DTE connection at 9600 bps

15 CONNECT 14400 Line speed or DTE connection at 14400 bps

16 CONNECT 19200 Line speed or DTE connection at 19200 bps

17 CONNECT 38400 Line speed or DTE connection at 38400 bps

18 CONNECT 57600 Line speed or DTE connection at 57600 bps

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