OSITECH COMMUNICATIONS, INC.
LAPTALK PLUS 14.4K
| Modem Type | Data (synchronous/asynchronous)/Fax | 
| Maximum Data Rate | 14.4Kbps | 
| Maximum Fax Rate | 14.4Kbps | 
| Data Bus | Compaq portable bus | 
| Fax Class | Class I & II | 
| Data Modulation Protocol | Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis | 
| Fax Modulation Protocol | ITU-T V.17, V.21CH2, V.27ter, V.29 | 
| Error Correction/Compression | MNP5, MNP10, V.42, V.42bis | 

| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| Line in | CN1 | Compaq portable bus | CN3 | 
| Daughterboard connector for network | CN2 | ||
Proprietary AT Command Set
| BIT-MAPPED REGISTERS | |
| Register | Default | 
| S14 | 138 | 
| S16 | 0 | 
| S21 | 4 | 
| S22 | 118 | 
| S23 | 55 | 
| S27 | 9 | 
| S28 | 0 | 
| S31 | 194 | 
| S39 | 3 | 
| S40 | 107 | 
| S41 | 03 | 
| BREAK SEND | |
| Type: | Configuration | 
| Format: | AT [cmds] \Bn [cmds] | 
| Example: | AT \B3 &W<CR> | 
| Default: | 3 | 
| Range: | 0-9 | 
| Unit: | .1 second | 
| Description: | Sends break to modem. | 
| BREAK TYPE | ||||
| Type: | Configuration | |||
| Format: | AT [cmds] \Kn [cmds] | |||
| Example: | AT \K1<CR> | |||
| Description: | Configures action of break signal. | |||
| Command | Break from DTE | Break from DTE while in command mode | Break from remote modem | |
| í\K0 | Enter command mode, do not send break to remote modem. | Buffers cleared and break sent to remote modem. | Buffers cleared and break sent to DTE. | |
| í\K1 | Buffers cleared and break sent to remote modem. | Buffers cleared and break sent to remote modem. | Buffers cleared and break sent to DTE. | |
| í\K2 | Enter command mode, do not send break to remote modem. | Send break to remote modem immediately. | Send break to DTE immediately. | |
| í\K3 | Send break to remote modem immediately. | Send break to remote modem immediately. | Send break to DTE immediately. | |
| í\K4 | Enter command mode, do not send break to remote modem. | Send break to remote modem with transmitted data. | Send break to remote modem with transmitted data. | |
| » \K5 | Send break with transmitted data. | Send break to remote modem with transmitted data. | Send break to remote modem with transmitted data. | |
| COMPRESSION | |
| Type: | Configuration | 
| Format: | AT %Cn | 
| Example: | AT %C1 &B0<CR> | 
| Description: | Selects data compression. | 
| íCommand | Function | 
| í%C0 | Data compression disabled. | 
| í%C1 | MNP5 enabled. | 
| í%C2 | V.42bis enabled. | 
| » %C3 | MNP5 and V.42bis enabled. | 
| CONNECT MODE | |
| Type: | Configuration | 
| Format: | AT [cmds] \Nn [cmds] | 
| Example: | AT \N1 DT555-1212<CR> | 
| Description: | Sets connect mode. | 
| íCommand | Function | 
| í\N0 | Normal mode enabled. | 
| í\N1 | Direct mode enabled. | 
| í\N2 | Reliable mode enabled. | 
| » \N3 | Auto-reliable mode enabled. | 
| í\N4 | LAPM mode enabled. | 
| í\N5 | MNP mode enabled. | 
| FALL FORWARD/ADJUST TRANSMIT LEVEL | |
| Type: | Configuration | 
| Format: | AT [cmds] -Un [cmds] | 
| Example: | AT -U1 &W<CR> | 
| Description: | Forces a fall forward and change in transmit level during fall forward | 
| íCommand | Function | 
| -U0 | Automatic attenuation to -10dBm | 
| -U1 | Automatic attenuation down to -18dBm | 
| -U2 | Automatic attenuation down to22dBm | 
| -U3 | automatic attenuation down to -25dBm | 
| -U4 | At 2400bps, force transmit level to -10 dBm | 
| -U5 | At 2400bps, force transmit level to -18 dBm | 
| -U6 | At 2400bps, force transmit level to -22 dBm | 
| -U7 | At 2400bps, force transmit level to -25 dBm | 
| FALLBACK | |
| Type: | Immediate | 
| Format: | AT [cmds] -B [cmds] | 
| Example: | AT -B &W<CR> | 
| Description: | Forces fallback to 1200bps at -10dBm | 
| FLOW CONTROL CHARACTER - XOFF | |
| Type: | Register | 
| Format: | AT [cmds] S33=n [cmds] | 
| Example: | ATS33=20<CR> | 
| Default: | 19 | 
| Range: | 0-255 | 
| Unit: | ASCII | 
| Description: | Sets the character used to represent XOFF. | 
| FLOW CONTROL CHARACTER - XON | |
| Type: | Register | 
| Format: | AT [cmds] S32=n [cmds] | 
| Example: | ATS32=20<CR> | 
| Default: | 17 | 
| Range: | 0-255 | 
| Unit: | ASCII | 
| Description: | Sets the character used to represent XON. | 
| LEASED LINE TRANSMISSION LEVEL | |
| Type: | Configuration | 
| Format: | AT [cmds] S99=n [cmds] | 
| Example: | AT S99=8<CR> | 
| Default: | 10 | 
| Range: | 0 to 15 | 
| Unit: | -1 dBm | 
| Description: | Sets the signal level for transmission when in leased-line mode. | 
| LINE SIGNAL LEVEL | |
| Type: | Immediate | 
| Format: | AT [cmds] %L [cmds] | 
| Example: | AT %L &W<CR> | 
| Range: | 9-43 | 
| Unit: | -1dB | 
| Description: | Returns received line signal level. | 
| MNP10 COMPRESSION | |
| Type: | Configuration | 
| Format: | AT [cmds] -Kn [cmds] | 
| Example: | AT %C1 -K1<CR> | 
| Description: | Selects MNP10 data compression. | 
| íCommand | Function | 
| í-K0 | MNP10 disabled. | 
| » -K1 | MNP10 enabled. | 
| MNP10 LINK NEGOTIATION | |
| Type: | Configuration | 
| Format: | AT [cmds] *Hn [cmds] | 
| Example: | AT *H0 -Q1<CR> | 
| Description: | Sets the speed at which MNP10 link negotiation will occur. | 
| íCommand | Function | 
| » *H0 | Link will be negotiated at highest possible speed. | 
| í*H1 | Link will be negotiated at 1200bps. | 
| MNP10 POWER LEVEL ADJUST | |
| Type: | Configuration | 
| Format: | AT [cmds] )Mn [cmds] | 
| Example: | AT )M1 %C1<CR> | 
| Description: | Controls automatic transmit power level adjustment during MNP 10 link negotiation. | 
| íCommand | Function | 
| » )M0 | Power level adjustment disabled. | 
| í)M1 | Power level adjustment enabled. | 
| PROTOCOL/SPEED | |
| Format | AT [cmds] S37=n [cmds] | 
| Example: | ATS37=11<CR> | 
| Default: | 0 | 
| Range: | 0-21 | 
| Unit: | Bit-mapped. | 
| Description: | Selects protocol and line speed. | 
| íCommand | Function | 
| » S37=0 | Auto-select fastest common protocol. | 
| S37=1 | Connect at 300bps | 
| S37=2 | Connect at 300bps | 
| S37=3 | Connect at 300bps. | 
| S37=4 | Not used. | 
| S37=5 | Connect at 1200bps V.22. | 
| S37=6 | Connect at 2400bps.V.22bis | 
| S37=7 | Connect at 75/1200bps.V.32 | 
| S37=8 | Connect at 4800bps V.32bis/V.32. | 
| S37=9 | Connect at 9600bps V.32bis/V.32 | 
| S37=10 | Connect at 12Kbps V.32bis | 
| S37=11 | Connect at 14.4Kbps V.32bis | 
| S37=12 | Connect at V.32bis 7200bps | 
| REPORT SIGNAL QUALITY | |
| Type: | Configuration | 
| Format: | AT [cmds] %Q [cmds] | 
| Example: | AT %Q &W<CR> | 
| Description: | Reports signal quality. | 
| SLEEP TIMER | |
| Format | AT [cmds] S24=n [cmds] | 
| Example: | ATS24=40<CR> | 
| Default: | 1 | 
| Range: | 0 - 255 | 
| Unit: | 10 second | 
| Description: | Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode. |