VOICEVIEW COMMANDS |
VoiceView is a feature that allows for Switched Voice
and Data (SVD) transmissions. This means that your modem
can send voice and data at the same time over a telephone
line on a single connection. VoiceView alternates
(switches) the voice and data signals, which makes it
different from DSVD, which allows for simultaneous
transmission of voice and data signals.
The following table lists the VoiceView AT commands
that your modem understands. Each command description
names the command, explains it, and lists any associated
parameters.
Command |
Description |
+FCLASS=80 |
Enter Voice Mode.
AT+FCLASS=80 instructs the modem to enter
VoiceView mode and use the set of VoiceView mode
commands. |
-SVV |
Start VoiceView Data Mode. AT-SVV
initiates the transmission of the VoiceView data
mode start sequence and initiates a data
transaction. |
-SAC |
Accept Data Mode Request. AT-SAC
instructs the modem to accept the incoming
VoiceView data mode start sequence and proceed
with establishing a data transaction. |
-SIPn |
Initialize VoiceView Parameters.
AT-SIPn sets VoiceView parameters. Parameters:
n = 0 - 2
n = 0 Reset parameters to defaults
n = 1 Reset parameters to defaults and audit
message storage
n = 2 Reset parameters to defaults and erase
message storage
|
-SIC |
Reset Capabilities Data to
Default Setting. AT-SIC resets the capabilities
data structure to the default capabilities. |
-SSQ |
Start Capabilities Query. AT-SSQ
initiates the transmission of the VoiceView
capabilities. |
-SDA |
Start Modem Data Mode. AT-SDA
initiates the transmission of the modem data mode
start sequence and causes the modem to switch to
data mode. |
-SFX |
Start Facsimile Data Mode. AT-SFX
initiates the transmission of the fax data mode
start sequence and causes the modem to switch to
fax data mode. |
-SMTn |
Telephone Handset Mute Control.
AT-SMTn controls the manual muting of the local
telephone interface. Parameters: n = 0, 1
n = 0 Unmute (default)
n = 1 Mute
|
-SQR=n |
Capabilities Query Response
Control. AT-SQR=n controls the response to a
capabilities query. Parameters: n = 0, 1
n = 0 One-way response. Your modem does not
request capability information from the
originating modem.
n = 1 Two-way response. After answering a
query for its capabilities, your modem requests
capability information from the originating
modem.
|
-SCD=n |
Set Capabilities Data. AT-SCD=n
is used to read, add to, or establish the
contents of the modem's capabilities data
structure. The capabilities elements (n) consist
of pairs of hexadecimal numbers and specify the
capabilities information. AT-SCD? Reads the
current capabilities
|
-SER? |
Error Reporting. AT-SER? asks the
modem for an error report. The modem responds
with either 0 (no error found) or a pair of
hexadecimal digits representing the error
parameter byte. These error codes are listed in
the Error Reporting Codes
table. |
-SSP=<compound
value> |
Set VoiceView Transmission
Speeds. AT-SSP=<compound value> specifies
the data modulation schemes that are associated
with the VoiceView mode tones. The digits of the
compound value represent burst speed, recovery
speed, and priority speed. Valid values: 0 - 7
0 V.21 300 bps FSK
1 V.27ter 4800 bps DPSK
2 V.29 9600 bps QAM
3 V.29 4800 bps QAM
4 V. 17 7200 bps TCM
5 V.17 9600 bps TCM
6 V.17 12000 bps TCM
7 V.17 14400 bps TCM
Default: (0, 1, 2)
|
-SSR=n |
Start Sequence Response Control.
AT-SSR=n enables or disables a response to all
VoiceView data start sequences. Parameters: n
= 0, 1
n = 0 Disable response
n = 1 Enable response (default)
|
+FLO=n |
Flow Control. AT+FLO=n allows the
computer to identify and select the type(s) of
flow control provided and used. Parameters: 0,
1, 2
n = 0 No flow control
n = 1 Bidirectional XON/XOFF flow control
(default)
n = 2 ITU circuit 133 for flow control of the
modem by the computer; circuit 106 for flow
control of the computer by the modem
|
Error Reporting Codes |
Error Code |
Description |
81 |
Unrecognized command
issued by the computer |
82 |
Unsupported
parameter received |
83 |
Could not initiate
data mode because switchhook is on-hook |
84 |
Invalid capabilities
information written by the computer |
85 |
Could not initiate
capabilities query |
86 |
No data available to
send to the computer |
87 |
Could not initiate
data mode because the message storage system is
receiving messages |
88 |
No incoming start
sequence present |
89 |
Could not initiate
data mode because capability not active |
41 |
Send sequence error |
42 |
Receive sequence
error |
43 |
Unexpected DISC
received as response |
44 |
Maximum number of
retransmissions (N200) exceeded |
45 |
Maximum number of
octets in I-frame exceeds N201 |
46 |
Maximum number of
outstanding I-frames (k) exceeded |
21 |
Timeout waiting for
a valid mode tone in the start sequence |
22 |
Timeout waiting for
data modulation to begin after the start sequence
|
23 |
Timeout waiting for
a valid data frame or near-end has no remove flow
control (T203 expired) |
24 |
Inactivity timeout
in VoiceView auto-answer state (T300 expired) |
25 |
Timeout waiting for
a response to a capabilities query (T301) |
26 |
Timeout waiting for
a response to a capabilities exchange request
(T301) |
27 |
Timeout waiting for
the remote modem to respond to a data mode start
sequence (T200 expired) |
28 |
Timeout waiting for
the remote modem to remove flow control |
29 |
Timeout waiting for
data from the computer (T303) |
2A |
Timeout waiting for
physical layer to transmit frame |
2B |
Timeout waiting for
a response from the computer after sending an
event indication (T310) |