DATATRONICS TECHNOLOGY, INC. DISCOVERY LCD Card Type Modem(synchronous/asynchronous) Chip Set Unidentified Maximum Data Rate 28.8Kbps Maximum Fax Rate 14.4Kbps Data Bus External Fax Class Class II Data Modulation Protocol Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis, V.34 Rockwell V.FC Fax Modulation Protocol ITU-T V.17, V.21CH2, V.27ter, V.29 Error Correction/Compression MNP5, V.42bis [Image] CONNECTIONS Function Label Function Label Line out CN1 Power switch SW1 Line in/leased line CN2 LCD panel lock SW2 RS-232/422 CN3 Voice/data SW3 DC power CN4 LCD panel navigation NAV Volume R1 DIAGNOSTIC LED(S) LED Color Status Condition MR Yellow On Power is on MR Yellow Off Power is off TR Yellow On DTR signal is high TR Yellow Off DTR signal is low RTS Yellow On RTS signal is high RTS Yellow Off RTS signal is low CTS Yellow On CTS signal is high CTS Yellow Off CTS signal is low AA Yellow On Auto-answer enabled AA Yellow Off Auto-answer disabled AA Yellow Blinking Phone is ringing RL Yellow On Error correction enabled RL Yellow Off Error correction disabled RL Yellow Blinking Error detected RD Yellow Blinking Modem is receiving data RD Yellow Off Modem is not receiving data SD Yellow Blinking Modem is transmitting data SD Yellow Off Modem is not transmitting data CD Yellow On Carrier signal detected CD Yellow Off Carrier signal not detected OH Yellow On Modem is off-hook OH Yellow Off Modem is on-hook Proprietary AT Command Set ANSWER TONE DETECTION Type: Configuration Format: AT [cmds] %In [cmds] Description: Controls answer tone detection Command Function %I0 Answer tone detection enabled %I1 Answer tone detection disabled AUTO REDIAL INTERVAL TIMES Type Register Format AT [cmds] S19=n [cmds] Default 2 Range 0-255 Unit Unidentified Description Unidentified AUTO-RELIABLE FALLBACK CHARACTER Type: Configuration Format: AT [cmds] %An [cmds] Default: 0 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] 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, resets to \C1 on receipt of autoreliable fallback character AUTO-RETRAIN Type: Configuration Format: AT %En Description: Selects auto-retrain mode Command Function %E0 Auto-retrain disabled %E1 Three auto-retrains attempted then hang up for 2400bps and above enabled %E2 Three auto-retrains attempted then hang up for 2400bps and above enabled BIT-MAPPED REGISTER S14 Format AT [cmds] S14=n [cmds] Default: 136 Range: 0-254 Unit: Bit-mapped Description: Controls echo, result codes, result code display, dumb mode, dial mode, dumb modem and answer/originate mode Bit Value Function 0 0 Not used 1 0 Command echo disabled 1 Command echo enabled 2 0 Result codes enabled 1 Result codes disabled 3 0 Display result codes in numeric format 1 Display result codes in verbose format 4 0 Smart mode 1 Dumb mode 5 0 Tone dial enabled 1 Pulse dial enabled 6 0 Smart modem 1 Dumb modem 7 0 Answer mode enabled 1 Originate mode enabled BIT-MAPPED REGISTER S21 Format: AT [cmds] S20=n [cmds] Default: 176 Range: 0-187 Description: Controls jack type, DSR, DTR, DCD and disconnect options Bit Value Function 0 0 RJ-11/41S/45S 1 RJ12-12/13 1 0 DSR forced high 1 DSR normal 2 0 Not used 4, 3 00 Ignore DTR 01 Go to command mode on low DTR 10 Hang up on low DTR 11 Initialize on low DTR 5 0 DCD forced high 1 Normal operation 7, 6 00 Special disconnect disabled 01 Long space disconnect enabled 10 Clear down disconnect enabled BIT-MAPPED REGISTER S22 Format AT [cmds] S22=n [cmds] Default: 118 Range: 0 - 255 Unit: Bit-mapped. Description: Controls volume and speaker settings, result codes, and make/break pulse ratio Bit Value Function 1, 0 00 Lowest volume setting 01 Low volume setting 10 Medium volume setting 11 Highest volume setting 3, 2 00 Speaker disabled 01 Speaker enabled until carrier signal detected 10 Speaker enabled 11 Speaker enabled until carrier signal detected, but disable during dialing 6, 5 ,4 000 Numeric result codes enabled 001 Verbose result codes enabled 010 Dialtone detection enabled 011 Busy tone detection enabled 100 Busy and dialtone detection enabled 7 0 39/61ms at 10pps (North America) 1 33/67ms at 10pps (Europe) BIT-MAPPED REGISTER S24 Format: AT [cmds] S24=n [cmds] Default: 0 Range: 0-7 Description: Controls V.25bis options Bit Value Function 0 0 V.25bis disabled 1 V.25bis enabled 1 0 V.25bis asynchronous enabled 1 V.25bis synchronous enabled 2 0 V.25bis HDLC enabled 1 V.25bis bisynchronous enabled BIT-MAPPED REGISTER S27 Format: AT [cmds] S27=n [cmds] Default: 0 Range: 0-236 Description: Controls synchronous mode, pulse dial speed, clock source, and data protocol Bit Value Function 2, 1, 0 000 Asynchronous operation 001 Synchronous mode 1 operation 010 Synchronous mode 2 operation 011 Synchronous mode 3 operation 100 Asynchronous dial 3 0 Standard pulse dial enabled 1 Fast pulse dial enabled 5, 4 00 Local DCE transmit clock enabled 01 Local DTE transmit clock enabled 10 Remote DCE transmit enabled 7, 6 00 V.21, V.22, V.32 enabled 01 Bell 103A/212A 10 V.23 back channel 11 V.23 main channel BIT-MAPPED REGISTER S29 Format: AT [cmds] S29=n [cmds] Default: 3 Range: 31 Description: Controls data bits, parity and stop bits Bit Value Function 1, 0 00 5 data bits 01 6 data bits 10 7 data bits 11 8 data bits 3, 2 00 No parity 01 Space parity 10 Even parity 11 Odd parity 4 0 1 stop bit 1 2 stop bits BIT-MAPPED REGISTER S32 Format: AT [cmds] S32=n [cmds] Default: 17 Range: 0-191 Description: Controls ring, call back security, hardware data security, message working bit, V.32 forward/backward link, &Z/@Z working bit and line used Bit Value Function 0 0 Ring disabled 1 Ring enabled 1 0 Call back security disabled 1 Call back security enabled 2 0 Hardware data security disabled 1 Hardware data security enabled 3 0 Open message working bit 1 Close message working bit 4 0 V.32 forward/backward link disabled 1 V.32 forward/backward link enabled 5 0 &Z working bit enabled 1 @Z working bit enabled 7, 6 00 Switched line enabled 01 2 wire leased line enabled 10 4 wire leased line enabled BIT-MAPPED REGISTER S34 Format: AT [cmds] S34=n [cmds] Default: 0 Range: 0-63 Description: Controls V.32 TCM/QAM, DTR dump recognition, RLSD level, asynchronous and soft reset Bit Value Function 0 0 Enable trellis code modulation 1 Enable quadratic amplitude modulation 1 0 Recognize DTR dump in handshaking 1 Ignore DTR dump in handshaking 3, 2 00 RLSD on at, -43dbm off at -48dbm 01 RLSD on at, -33dbm off at -38dbm 10 RLSD on at, -26dbm off at -31dbm 11 RLSD on at, -16dbm off at -21dbm 5, 4 00 Normal AT&F ATZ 01 Quick ATZ.2 10 Quick AT&F ATZ BIT-MAPPED REGISTER S35 Format: AT [cmds] S35=n [cmds] Default: 15 Range: 0-232 Description: Controls Power on auto dial Bit Value Function 3, 2, 1, 0 0000 STN for power on auto dial 1000 Power on auto dial disabled 5, 4 00 Restore all disabled 01 Switched line simulates leased line enabled 10 Switched line back up enabled 6 0 Single phone system enabled 1 Multiple phone systems enabled 7 0 Disconnect reset disabled 1 Disconnect reset enabled BIT-MAPPED REGISTER S39 Format: AT [cmds] S39=n [cmds] Default: 153 Range: 0-253 Description: Controls compression, auto retrain answer tone check, compromise equalizer and detect phase Bit Value Function 0 0 Data compression disabled 1 Data compression enabled 2, 1 00 Auto retrain disabled 01 Auto retrain on same speed 10 Auto retrain with speed change 4, 3 00 Disabled 01 Transmit only 10 Receive only 11 Transmit and receive 5 0 Answer tone check enabled 1 Answer tone check disabled 6 0 Compromise equalizer enabled 1 Compromise equalizer disabled 7 0 Detect phase disabled 1 Detect phase enabled BIT-MAPPED REGISTER S40 Format: AT [cmds] S40=n [cmds] Default: 0 Range: 0-33 Description: Controls remote access and remote access security Bit Value Function 0 0 Remote access disabled 1 Remote access enabled 4, 3, 2, 1 0000 Not used 5 0 Remote access security disabled 1 Remote access security enabled BIT-MAPPED REGISTER S43 Format: AT [cmds] S43=n [cmds] Default: 19 Range: 0-155 Description: Controls MNP block size, dictionary size and data buffer Bit Value Function 1, 0 00 Maximum MNP block size 64 characters 01 Maximum MNP block size 128 characters 10 Maximum MNP block size 192 characters 11 Maximum MNP block size 256 characters 2 0 Not used 4, 3 00 Maximum dictionary size 512 entries 01 Maximum dictionary size 1024 entries 10 Maximum dictionary size 2048 entries 11 Maximum dictionary size 4048 entries 5 0 Not used 7, 6 00 Disable data buffer 01 Set buffer to 4 seconds, 200 characters or SYN character detected then switch to 10 normal connection Data buffer disabled, switch to normal connection BIT-MAPPED REGISTER S44 Format: AT [cmds] S44=n [cmds] Default: 0 Range: 140 Description: Controls echo, flow control and serial port speed. Bit Value Function 2 0 On line data echo disabled 1 On line data echo enabled 3 0 Modem port flow control disabled 1 Modem port flow control enabled 6, 5, 4 000 Not used 7 0 Serial port speed locked 1 Serial port speed follows connection speed BIT-MAPPED REGISTER S45 Format: AT [cmds] S45=n [cmds] Default: 101 Range: 253 Description: Controls break control, link type, DTE speed and mode Bit Value Function 2, 1, 0 000 Enter command mode, do not send break 001 Clear buffer, send break immediately 010 Enter command mode, do not send break 011 Do not clear buffer, send break immediately 100 Enter command mode, do not send break 101 Send break with transmitted data 3 0 Stream link enabled 1 Block link enabled 4 0 DTE speed follows connect speed 1 DTE speed locked 7, 6, 5 000 Normal mode 001 Direct mode 010 MNP mode 011 Auto reliable mode 100 LAPM mode 101 LAPM with fallback to normal mode 110 LAPM with fallback to MNP mode 111 MNP with fallback to normal mode BIT-MAPPED REGISTER S46 Format: AT [cmds] S46=n [cmds] Default: 75 Range: 0-238 Description: Controls flow control, ring indicate and result codes Bit Value Function 2, 1, 0 000 Flow control disabled 001 XON/XOFF flow control enabled 010 Unidirectional hardware flow control enabled 011 Bidirectional hardware flow control enabled 100 Unidirectional XON/XOFF flow control enabled 101 CTS low until connect, then CTS unidirectional flow control enabled 110 CTS low until connect, then RTS/CTS flow control enabled 3 0 Ring indicate after handshaking enabled 1 Ring indicate after handshaking disabled 6, 5, 4 000 V.42/MNP result code disabled 001 V.42/MNP4 and DTE speed result codes enabled 010 V.42/MNP4 and DCE speed result codes enabled 011 V.42bis/MNP5 and DTE speed result codes enabled 100 V.42bis/MNP5 and DCE speed result codes 101 enabled 110 V.42bis/MNP5 and DTE debug codes enabled V.42bis/MNP5 and DCE debug codes enabled 7 0 Flow control character trapped 1 Flow control character passed through BIT-MAPPED REGISTER S53 Format: AT [cmds] S53=n [cmds] Default: 56 Range: 0-56 Description: Controls ring indicate reset timer, V.25 calling tone and T30 calling tone Bit Value Function 3, 2, 1, 0 1000 Ring indicate reset timer 4 0 V.25 calling tone disabled 1 V.25 calling tone enabled 5 0 T30 calling tone disabled 1 T30 calling tone enabled BREAK SEND Type: Configuration Format: AT [cmds] \Bn [cmds] Default: 3 Range: 0-9 Unit: .1 second Description: Sends break to modem BREAK TYPE Type: Configuration Format: AT [cmds] \Kn [cmds] Description: Configures action of break signal Command Break from DTE \K0 Online command mode enabled, send no break to remote modem \K1 Break sent to remote modem and buffers cleared \K2 Online command mode enabled, send no break to remote modem \K3 Send break to remote modem immediately \K4 Online command mode enabled, send no break to remote modem \K5 Send break with transmitted data CALL BACK DELAY TIMER Type Register Format AT [cmds] S31=n [cmds] Default 10 Range 0-255 Unit 1 second Description Controls call back delay CALLBACK NUMBER Type Configuration Format AT [cmds] @Zn=xxx [cmds] Default None Description Stores numbers to be called back during callback operation. N is a memory location from 0-9 and xxx is a combination of the number and up to 49 dial modifiers. CALLBACK PASSWORD Type Configuration Format AT [cmds] @Wn=xxxxxxxxxx [cmds] Default None Range A-Z, a-z,0-9 Unit ASCII string Description Stores callback password (n is password and xxxxxxxxxx is up to ten characters) CALLBACK SECURITY Type: Configuration Format: AT [cmds] @An [cmds] Description: Modem returns call to previously stored number Command Function @A0 Callback security disabled @A1 Callback security enabled CALL BACK SECURITY DELAY Type Configuration Format AT [cmds] @Dn [cmds] Default 30 Range 1-255 Unit 1 second Description Sets length of wait before dialing stored callback security phone number CARRIER DETECT TIMER Type Register Format AT [cmds] S17=n [cmds] Default 10 Range 0-255 Unit Unidentified Description Unidentified CLOSING MESSAGE Type Configuration Format AT [cmds] @Gxxx [cmds] Default THANK YOU! YOU WILL BE CALLED BACK! Range Up to 60 characters Unit ASCII Description Stores a closing message CONNECTION PASSWORD SECURITY Type: Configuration Format: AT [cmds] @En [cmds] Description: Requires correct password to be included in dial command string Command Function @E0 Password security disabled @E1 Password security enabled COMPRESSION Type: Configuration Format: AT %Cn Description: Selects data compression Command Function %C0 Data compression disabled %C1 MNP5 and V.42bis enabled CONNECT MODE Type: Configuration Format: AT [cmds] \Nn [cmds] Description: Sets connect mode Command Function \N0 Normal mode enabled \N1 Direct mode enabled \N2 MNP reliable mode only enabled \N3 V.42 and MNP modes enabled \N4 V.42bis and V.42 modes enabled CONNECTION PASSWORD Type Configuration Format AT [cmds] @Pxxxxxxxxx [cmds] Default None Range A-Z,a-z,0-9,*,# Unit ASCII string Description Stores password required by command string password security option of up to nine characters CONNECTION SPEED UPPER LIMIT Type: Immediate Format: AT [cmds] %Bn [cmds] Description: Selects the current DCE speed. Command Function %B0 Line speed sets maximum serial port speed %B300 300bps %B600 600bps %B1200 1200bps %B2400 2400bps %B4800 4800bps %B7200 7200bps %B9600 9600bps %B12000 12.0Kbps %B16800 16.8Kbps %B14400 14.4Kbps %B19200 19.2Kbps %B21600 21.6Kbps %B24000 24.0Kbps %B26400 26.4Kbps %B28800 28.8Kbps DIAL TONE DETECT Type: Configuration Format: AT [cmds] W [cmds] Description: Requires a continuous three second dial tone before dialing DISPLAY CALLBACK SETTINGS Type: Immediate Format: AT [cmds] @Vn [cmds] Description: Displays passwords, messages and phone numbers stored in memory Command Function @V0 Display stored callback security passwords @V1 Display stored callback security phone numbers @V2 Display opening and closing messages DISPLAY PASSWORDS Type: Immediate Format: AT [cmds] @Fn [cmds] Description: Displays callback security and remote access passwords DTR DELAY Type Register Format AT [cmds] S25=n [cmds] Default 5 Range 0-255 Unit 1 second Description Sets length of time modem ignores DTR change DUMB MODE Type: Configuration Format: AT [cmds] @In [cmds] Description: Controls smart and dumb modes Command Function @I0 Smart mode @I1 Dumb mode FLOW CONTROL TYPE Type: Configuration Format: AT [cmds] \Qn [cmds] 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 FLOW CONTROL Type: Configuration Format: AT [cmds] \Gn [cmds] Description: Selects modem port flow control Command Function \G0 Flow control disabled \G1 Flow control enabled HANG UP DELAY Type Register Format AT [cmds] S38=n [cmds] Default 0 Range 0-255 Unit Unidentified Description Sets time before forced hang up, n=255 disables INACTIVITY TIMER Type: Configuration Format: AT [cmds] \Tn [cmds] Default: 0 Range: 0-255 Unit: 1 minute Description: Sets the length of time that the modem does not receive information before it disconnects INACTIVITY TIMER Type Register Format AT [cmds] S47=n [cmds] Default 0 Range 0-255 Unit Unidentified Description Sets time modem waits before disconnecting LEASED LINE DIALUP BACKUP TIMES Type: Register Format: AT [cmds] S13=n [cmds] Default: 0 Range: 0-255 Unit: Unidentified Description: After leased line failure, modem attempts to reconnect after specified delay LEASED LINE DIALUP BACKUP TIMER Type Register Format AT [cmds] S15=n [cmds] Default 5 Range 0-255 Unit Unidentified Description Unidentified LEASED LINE RETRY Type Configuration Format AT [cmds] -Bn [cmds] Range Unidentified Unit Retries Description Controls the number of times a leased line connection is attempted LINE SIGNAL LEVEL Type: Immediate Format: AT [cmds] %L [cmds] Description: Returns received line signal level LEASED LINE TRANSMIT LEVEL Type Register Format AT [cmds] S51=n [cmds] Default 10 Range 0-31 Unit Unidentified Description Sets leased line transmit level LINE TYPE Type: Configuration Format: AT [cmds] @Yn [cmds] Description: Selects line type Command Function @Y0 Switched line operation @Y1 Switched line operation emulates leased line operation @Y2 Leased line with switched line backup LOCK DCE Type: Configuration Format: AT [cmds] %Hn [cmds] Description: Controls DCE speed Command Function %H0 DCE speed not locked %H1 DCE speed locked LOCK SERIAL PORT Type: Configuration Format: AT [cmds] \Jn [cmds] 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] 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 OPENING MESSAGE Type Configuration Format AT [cmds] @Oxxx [cmds] Default PLEASE ENTER CALL BACK PASSWORD Range Up to 60 characters Unit ASCII string Description Stores an opening message PROTOCOL Type: Configuration Format: AT [cmds] -Vn [cmds] Description: Controls protocol used Command Function -V0 V.34 auto -V1 V.FC auto -V3 V.32bis auto -V4 V.34/V.FC/V.32bis -V5 V.34 only -V6 V.FC only -V7 V.32bis only PROTOCOL Type: Register Format: AT [cmds] S54=n [cmds] Description: Controls protocol used Command Function S54=0 V.34 auto mode S54=1 V.FC auto mode S54=3 V.32bis auto mode S54=4 V.34, V.FC and V.32bis S54=5 V.FC and V.32bis S54=6 V.34 only S54=7 V.FC only S54=8 V.32bis only REDIAL Type Configuration Format AT [cmds] N=n [cmds] Default 0 Range 0-15 Unit Redials Description Sets number of redials attempted if busy signal received REDIAL INTERVAL Type Configuration Format AT [cmds] N5=n [cmds] Default 1 Range 0-255 Unit 2 seconds Description Controls time between redials REDIAL LIMIT Type Register Format AT [cmds] S49=n [cmds] Default 15 Range Unidentified Unit Unidentified Description Sets maximum number of redials REDIAL ORDER Type Configuration Format AT [cmds] -Z=nnn [cmds] Unit Phone number memory location Description Controls order in which stored numbers are dialed -Z? displays order REMOTE ACCESS Type: Configuration Format: AT [cmds] *En [cmds] Description: Controls remote access operation Command Function *E0 Remote access disabled *E1 Remote access enabled REMOTE ACCESS ATTENTION CHARACTER Type Register Format AT [cmds] S41=n [cmds] Default 42 Range 0-255 Unit ASCII Description Selects the remote access attention character REMOTE ACCESS PASSWORD Type Configuration Format AT [cmds] *Pxxxxxxxxx Default None Range Up to nine characters Unit ASCII printable characters Description Stores remote access password REPORT SIGNAL QUALITY Type: Immediate Format: AT [cmds] %Q [cmds] Description: Reports signal quality RESULT CODE FORMAT Type: Configuration Format: AT [cmds] \Vn [cmds] Description: Selects which result codes are displayed Command Function \V0 Connect speed result codes enabled \V1 Connect speed and V.42/MNP result codes enabled \V2 Connect speed, V.42/MNP and data compression result codes enabled \V3 Connect speed, V.42/MNP and data compression result codes enabled \V4 Connect speed, V.42/MNP and data compression result codes enabled RINGER Type: Configuration Format: AT [cmds] @Bn [cmds] Description: Controls ring signal passthrough to modem speaker Command Function @B0 Ringer disabled @B1 Ringer enabled RTS TO CTS DELAY Type Register Format AT [cmds] S26=n [cmds] Default 0 Range 0-255 Unit .1 second Description Sets delay after receipt of RTS signal until CTS forced high SWITCHED LINE TRANSMIT LEVEL Type Register Format AT [cmds] S50=n [cmds] Default 10 Range 0-15 Unit Unidentified Description Sets switched line transmit level SERIAL PORT Format: AT [cmds] S28=n [cmds] Default: 113 Range: 0-243 Description: Controls serial port options, parity and data bits Bit Value Function 4, 3, 2, 1, 0 00000 Lock serial port at 75bps 00001 Lock serial port at 110bps 00010 Lock serial port at 300bps 00011 Lock serial port at 600bps 00100 Lock serial port at 1200bps 00101 Lock serial port at 2400bps 00110 Lock serial port at 4800bps 00111 Lock serial port at 7200bps 01000 Lock serial port at 9600bps 01001 Lock serial port at 12.0Kbps 01010 Lock serial port at 14.4Kbps 01011 Lock serial port at 16.8Kbps 01100 Lock serial port at 19.2Kbps 01101 Lock serial port at 21.6Kbps 01110 Lock serial port at 24.0Kbps 01111 Lock serial port at 26.4Kbps 10000 Lock serial port at 28.8Kbps 10001 Lock serial port at 38.4Kbps 10010 Lock serial port at 57.6Kbps 10011 Lock serial port at 11.52Kbps 6, 5 00 Even parity 01 Space parity 10 Odd parity 11 No parity 7 0 8 data bits 1 7 data bits SERIAL PORT SPEED Type: Register Format: AT [cmds] S52n [cmds] Description: Controls serial port speed Command Function S52=0 Serial port speed follows connect speed S52=1 Lock serial port at 110bps S52=2 Lock serial port at 300bps S52=3 Lock serial port at 600bps S52=4 Lock serial port at 1200bps S52=5 Lock serial port at 2400bps S52=6 Lock serial port at 4800bps S52=7 Lock serial port at 7200bps S52=8 Lock serial port at 9600bps S52=9 Lock serial port at 12.0Kbps S52=10 Lock serial port at 14.4Kbps S52=11 Lock serial port at 16.8Kbps S52=12 Lock serial port at 19.2Kbps S52=13 Lock serial port at 21.6Kbps S52=14 Lock serial port at 24.0Kbps S52=15 Lock serial port at 26.4Kbps S52=16 Lock serial port at 28.8Kbps S52=17 Lock serial port at 38.4Kbps S52=18 Lock serial port at 57.6Kbps S52=19 Lock serial port at 11.52Kbps SERVICE CLASS Format: AT [cmds] S33=n [cmds] Default: 0 Range: 192 Description: Controls MNP link and second channel Bit Value Function 6 0 MNP synchronous link enabled 1 MNP asynchronous link enabled 7 0 Second channel disabled 1 Second channel enabled TEST MODES Format AT [cmds] S16=n [cmds] Default: 0 Range: 0-255 Unit: Bit-mapped Description: Controls loopback tests, analog, digital, remote digital, and self tests Note: Bit 3 is read only Bit Value Function 0 0 Local analog loopback disabled 1 Local analog loopback in enabled 1 0 Local digital loopback disabled 1 Local digital loopback in enabled 2 0 Local digital loopback disabled 1 Local digital loopback in enabled 3 0 Modem not in remote digital loopback 1 Remote digital loopback in progress 4 0 Remote digital loopback disabled 1 Remote digital loopback enabled 5 0 Remote digital loopback w/ self-test disabled 1 Remote digital loopback w/ self-test enabled 6 0 Local analog loopback enabled 1 Local analog loopback disabled 7 0 Remote digital loopback enabled 1 Remote digital loopback disabled V.25bis MODES Type: Configuration Format: AT [cmds] *Cn [cmds] Description: Selects type of V.25bis operation Command Function *C0 V.25bis disabled *C1 V.25bis asynchronous enabled *C2 V.25bis bi-synchronous enabled *C3 V.25bis HDLC enabled V.42bis MAXIMUM STRING LENGTH Type: Register Format: AT [cmds] S42=n [cmds] Default: 16 Range: 0-255 Unit: Unidentified Description: Selects string size for V.42bis compression WAIT FOR CONNECTION PASSWORD Type Register Format AT [cmds] S48=n [cmds] Default 15 Range 0-255 Unit 1 second Description Sets length of wait for connection password after connection XON/XOFF PASS-THROUGH Type: Configuration Format: AT [cmds] \Xn [cmds] 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 S REGISTERS Register Default Function S49 15 Redial limit S50 10 Switched line transmit level S51 10 Leased line transmit level