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Chapter 4 - V.22bis Commands
Multi-Tech Systems, Inc. MT2456SMI-22 SocketModem Developer’s Guide 25
*D Display Delayed Numbers
This command causes the modem to send a list of the delayed numbers together with the delay associated with
each. The modem will return a list of delayed telephone numbers as defined in the *B command. The format of the
response is shown by the example below (delay times are shown as hours:minutes:seconds). If no numbers are
delayed, only the OK result code is issued.
Syntax *D
Example
NO. - PHONE NUMBER -DELAY
------ -------------------------------------------
1; 8264734660 2:00:00
2; 7532634661 2:00:00
3; 2587334662 0:02:00
4; 7532651663 0:03:25
5; 7459931664 0:01:45
OK
–STE= Set Telephony Extension
The –STE command enables/disables Line-in-Use, Extension Pickup, and Remote Hangup detection features.
Note: Additional hardware may be required to support these features.
Syntax -STE=<value>
Defined Values
<value> Decimal number corresponding to the selected bit-mapped options. The bit fields are defined as follows:
Bit 0 Line-in-Use detection enable/disable.
Bit 1 Extension Pickup detection enable/disable.
Bit 2 Remote Hangup detection enable/disable.
<value> (Dec.) Remote Hangup Extension Pickup Line-in-Use
0 (default) Disabled Disabled Disabled
1 Disabled Disabled Enabled
2 Disabled Enabled Disabled
3 Disabled Enabled Enabled
4 Enabled Disabled Disabled
5 Enabled Disabled Enabled
6 Enabled Enabled Disabled
7 Enabled Enabled Enabled
Reporting Current or Selected Values
Command: -STE?
Response: -STE: <value>
Example: -STE: 4 Remote Hangup enabled, Extension Pickup disabled, and Line-in-Use disabled.
Reporting Supported Range of Parameter Values
Command: -STE=? Show available options.
Response: -STE: 0-7
Result Codes OK <value> = 0-7
ERROR Otherwise
Behavior in Data Mode
When on-hook, if the line is in use and an ATDT is issued, the modem will not go off hook and will return with the
message “LINE IN USE”.
When off-hook and either an extension is picked up or a line reversal is detected, the modem will drop the
connection. The disconnect reason in register S86=25. The user must flash the hook in order to get a dial tone due
because the remote server will be retraining.
If the local handset is picked up while the modem is off-hook, the modem will do a link disconnect, flash the hook for
1.5 seconds, and then connect the local handset to the line. At this point, the user dial tone should be on the local
handset. The disconnect reason in S86=25.
Operation in Data Mode
Line-in-Use (Enabled by AT-STE=1, AT-STE=3, AT-STE=5, or AT-STE=7)
Case 1: Telephone Line is in Use
If an ATDT, ATDP or ATDL is issued while Line-in-Use detection is enabled and the telephone line is in use, the
modem will immediately return the message “LINE IN USE” to the DTE without going off-hook, and then return to
command mode.
Case 2: Telephone Line is in Use, But Disconnected
If an ATDT, ATDP or ATDL is issued while Line-in-Use detection is enabled and the telephone line is NOT in
use, the modem will go off-hook after a short pause, then respond with CONNECT or NO CARRIER message.
Case 3: Telephone Line is Not Connected to Modem
If an ATDT, ATDP or ATDL is issued while Line-in-Use detection is enabled and the telephone line is not
connected, the modem will go off-hook momentarily, go back onhook, then respond with NO DIAL TONE
message.