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
©
2006
MaxStream,
Inc.,
Confidential
and
Proprietary
21
