COMPUTER PERIPHERALS, INC.
VIVA 24M
Modem Type | Data (synchronous/asynchronous) |
Maximum Data Rate | 2400bps |
Data Bus | External |
Data Modulation Protocol | Bell 103A/212A ITU-T V.21, V.22, V.22bis |
Error Correction/Compression | MNP5 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Line out | CN1 | DC power | CN4 |
Line in | CN2 | Power switch | SW1 |
RS-232/422 | CN3 |
DIAGNOSTIC LED(S) | |||
LED | Color | Status | Condition |
HS | Red | On | Modem is operating at 2400bps |
HS | Red | Off | Modem is operating at slower than 2400bps |
AA | Red | On | Auto-answer enabled |
AA | Red | Off | Auto-answer disabled |
AA | Red | Blinking | Phone is ringing |
CD | Red | On | Carrier signal detected |
CD | Red | Off | Carrier signal not detected |
OH | Red | On | Modem is off-hook |
OH | Red | Off | Modem is on-hook |
RD | Red | On | Modem is receiving data |
RD | Red | Off | Modem is not receiving data |
SD | Red | On | Modem is transmitting data |
SD | Red | Off | Modem is not transmitting data |
TR | Red | On | DTR signal is high |
TR | Red | Off | DTR signal is low |
MR | Red | Blinking | Loopback tests enabled |
MR | Red | On | Power is on |
MR | Red | Off | Power is off |
Note: The LEDs are Icons. |
Proprietary AT Command Set
ACCEPT RELIABLE MODE | |
Type: | Immediate |
Format: | AT [cmds] \U |
Example: | AT \U <CR> |
Description: | Accepts remote modem’s request for reliable link. |
AUTO-RELIABLE FALLBACK CHARACTER | |
Type: | Configuration |
Format: | AT [cmds] %An [cmds] |
Example: | AT %A0 <CR> |
Default: | Unidentified |
Range: | 0-127 |
Unit: | ASCII |
Description: | Sets the character used as the auto-reliable fallback character. %A0 will disable this function. |
AUTO-RELIABLE TIME BUFFER CONFIGURATION | |
Type: | Configuration |
Format: | AT [cmds] \Cn [cmds] |
Example: | AT \C0 &W <CR> |
Description: | Controls the handling of incoming data during auto-reliable time period. |
Command | Function |
» \CO | Data is discarded. |
\C1 | Data is buffered. |
\C2 | Data is discarded, sets to normal mode and sends auto-reliable character to serial port. |
BREAK SEND | |
Type: | Configuration |
Format: | AT [cmds] \Bn [cmds] |
Example: | AT \B3 <CR> |
Default: | 3 |
Range: | 1-9 |
Unit: | .1 second |
Description: | Sends break to modem. |
BREAK TYPE | |||||
Type: | Configuration | ||||
Format: | AT [cmds] \Kn [cmds] | ||||
Example: | AT \K5 <CR> | ||||
Description: | Configures action of break signal. | ||||
Command | Break from DTE Reliable/Normal mode | Break from DTE Direct mode | Break from remote modem | Modem receives \B | |
\K0 | Enter command mode, do not send break to remote modem. | Send break to remote modem immediately, then enter command mode. | Buffers cleared and break sent to DTE. | Buffers cleared and break sent to remote modem. | |
\K1 | Buffers cleared and break sent to remote modem. | Send break to remote modem immediately. | Buffers cleared and break sent to DTE. | Buffers cleared and break sent to remote modem. | |
\K2 | Enter command mode, do not send break to remote modem. | Send break to remote modem immediately, then enter command mode. | Send break to DTE immediately. | Send break to remote modem immediately. | |
\K3 | Send break to remote modem immediately. | Send break to remote modem immediately. | Send break to DTE immediately. | Send break to remote modem immediately. | |
\K4 | Enter command mode, do not send break to remote modem. | Send break to remote modem immediately, then enter command mode. | Break sent with received data to the DTE. | Send break to remote modem with transmitted data. | |
» \K5 | Send break with transmitted data. | Send break to remote modem immediately. | Break sent with received data to the DTE. | Send break to remote modem with transmitted data. |
COMPRESSION | |
Type: | Configuration |
Format: | AT [cmds] %Cn [cmds] |
Example: | AT %C1 <CR> |
Description: | Selects data compression. |
Command | Function |
%C0 | Data compression disabled. |
» %C1 | Data compression enabled. |
CONNECT MODE | |
Type: | Configuration |
Format: | AT [cmds] \Nn [cmds] |
Example: | AT \N1 <CR> |
Description: | Sets connect mode. |
Command | Function |
\N0 | Normal mode enabled. |
» \N1 | Direct mode enabled. |
\N2 | Reliable mode enabled. |
\N3 | Auto-reliable mode enabled. |
CONVERT TO RELIABLE MODE | |
Type: | Immediate |
Format: | AT [cmds] \Y |
Example: | AT \Y <CR> |
Description: | Initiates reliable mode link. |
DISPLAY CURRENT COMMAND STATUS | |
Type: | Immediate |
Format: | AT [cmds] \S [cmds] |
Example: | AT \S <CR> |
Description: | Displays current setting of modem commands. |
ECHO DATA | |
Type: | Configuration |
Format: | AT [cmds] \En [cmds] |
\Example: | AT \E0 <CR> |
Description: | Enables modem to echo received data. |
Command | Function |
» \E0 | Data echo disabled. |
\E1 | Data echo enabled. |
FLOW CONTROL | |
Type: | Configuration |
Format: | AT [cmds] \Gn [cmds] |
Example: | AT \G0 <CR> |
Description: | Selects modem port flow control. |
Command | Function |
» \G0 | Flow control disabled. |
\G1 | Flow control enabled. |
FLOW CONTROL TYPE | |
Type: | Configuration |
Format: | AT [cmds] \Qn [cmds] |
Example: | AT \Q0 <CR> |
Description: | Sets type of flow control used by modem. |
Command | Function |
» \Q0 | Flow control disabled. |
\Q1 | XON/XOFF flow control enabled. |
\Q2 | CTS flow control to DTE enabled. |
\Q3 | RTS/CTS flow control enabled. |
INACTIVITY TIMER | |
Type: | Configuration |
Format: | AT [cmds] \Tn [cmds] |
Example: | AT\T0 <CR> |
Default: | 0 |
Range: | 0-90 |
Unit: | 1 minute |
Description: | Sets the length of time that the modem does not receive information before it disconnects. |
Note: \T0 will disable inactivity timer. |
LOCK SERIAL PORT | |
Type: | Configuration |
Format: | AT [cmds] \Jn [cmds] |
Example: | AT \J1 <CR> |
Description: | Sets operation of serial port speed. |
Command | Function |
\J0 | Serial speed locked. |
» \J1 | Serial speed follows connect speed. |
MAXIMUM BLOCK SIZE FOR TRANSMISSION | |
Type: | Configuration |
Format: | AT [cmds] \An [cmds] |
Example: | AT \A3 %C1 <CR> |
Description: | Sets the maximum transmittable block size. |
Command | Function |
\A0 | MNP block size is 64 characters. |
\A1 | MNP block size is 128 characters. |
\A2 | MNP block size is 192 characters. |
» \A3 | MNP block size is 256 characters. |
MNP RESULT CODES | |
Type: | Configuration |
Format: | AT [cmds] \Vn [cmds] |
Example: | AT \V1 <CR> |
Description: | Selects MNP result codes. |
Command | Function |
» \V0 | MNP result codes disabled. |
\V1 | MNP result codes enabled. |
MNP STREAM/BLOCK MODE | |
Type: | Configuration |
Format: | AT [cmds] \Ln [cmds] |
Example: | AT \L0 <CR> |
Description: | Selects the transfer mode for MNP. |
Command | Function |
» \L0 | Stream mode for MNP enabled. |
\L1 | Block mode for MNP enabled. |
ON-LINE IN RELIABLE MODE | |
Type: | Immediate |
Format: | AT [cmds] \O |
Example: | AT \O <CR> |
Description: | Returns to on-line and requests reliable mode connection. |
SWITCH TO MNP MODE | |
Type: | Immediate |
Format: | AT [cmds] \Z |
Example: | AT \Z <CR> |
Description: | Switches to normal mode from MNP mode. |
XON/XOFF PASS-THROUGH | |
Type: | Configuration |
Format: | AT [cmds] \Xn [cmds] |
Example: | AT \X0 <CR> |
Description: | Selects whether XON/XOFF signals are sent to remote modem. |
Command | Function |
» \X0 | XON/XOFF signals trapped by local modem. |
\X1 | XON/XOFF passed through local modem. |