Hardware manual
5901 High Speed Dialup Modem Hardware Manual
October 19, 2007
62
Command: -SMS<mode>
Defined Values
n Decimal number corresponding to the selected mode or automatic mode select enable.
0 Data mode (Default)
1 DSVD mode (a modem not supporting DSVD will respond with ERROR)
2 AudioSpan mode (a modem not supporting AudioSpan will respond with ERROR).
3 Automatic mode select (DSVD/AudioSpan/Data)
NOTES:
AudioSpan and DSVD are two technologies that allow simultaneous voice and data operation using
a Rockwell modem connected to a telephone line. AudioSpan and DSVD implementations differ in
the manner that voice and modem data are combined. Voice and data channels are combined in the
analog domain for AudioSpan and in the digital domain for DSVD.
Establishing a AudioSpan or DSVD connection is analogous to establishing a regular data modem
connection. Initiate the call using normal dialing (ATD) and answering (ATA) procedures. The
modem can switch from a regular phone conversation into AudioSpan or DSVD mode and back to
phone conversation. A handset, headset, or microphone/speaker can be used for voice
communication during AudioSpan or DSVD mode.
AudioSpan operates in normal (non-error corrected) or error-corrected/compression mode (MNP 5
or V.42 bis depending on the error correction settings of the modems). The DTE rate must be equal
to or greater than the anticipated DCE connection speed. In general, DTE speed of 38400 bps or
higher should be used.
DSVD requires a V.34 mode connection.
AudioSpan audio quality is dependent upon telephone line quality. Higher quality telephone lines
provide better audio quality than impaired telephone lines.
Reporting Selected Options:
The modem reports the selected options in response to the following command:
Command: -SMS?
Response: n
Example: 1
Reporting Supported Options:
The modem reports the supported options in response to the following command:
Command: -SMS=?
Response: (list of n values)
Example: (0,1,2,3)
10.5.3 –STE=n - Set Telephony Extension
This command enables/disables Line-In-Use and Extension Pickup/Remote Hangup Detection.
Command: -STE=<value>