V.34 Faxmodem (250-3037) AT Command Result Codes Faxback Doc. # 14481 After you enter a command (ENTER), your modem executes the command line and returns a result code. Your modem can express this result code as a word or a number. Also, you can select which result codes your modem uses, and even turn result codes on and off. Below are the ten result codes and their meanings. 0- OK The OK code is returned by the modem to acknowledge execution of a command line. 1- CONNECT The modem will send this result code upon connecting when: 1. The line speed is 300 bps and the modem has been instructed to report the line speed to the PC upon connecting, or 2. The PC speed is 300 bps and the modem has been instructed to report the PC speed to the PC upon connecting, or 3. The range of result code responses is restricted by the X command such that no speed reporting is allowed. 2- RING The modem sends this result code when incoming ringing is detected on the line. 3- NO CARRIER The modem sends this result code when attempting to establish a call if: 1. Ringback is detected and later ceases but no carrier is detected within the period of time determined by register S7, or 2. No ringback is detected within the period of time determined by register S7. This result code is also used when the modem auto-disconnects due to loss of carrier. Under X0, if busy tone detection is enforced, this result code is used as a response to the detection of busy or circuit busy. Under X0, if dial tone detection is enforced or selected, this result code is used to indicate that dial tone has not been detected. 4- ERROR The modem returns this result code if the command line contains a syntax error or it is unable to execute a command contained in the command line. It is issued if a command does not exist or if the parameter supplied is outside the permitted range. Under X0, Xl, X2, and X3, this result is used instead of DELAYED and BLACKLISTED. 5- CONNECT 1200 For X1, X2, X3, and X4, the modem sends this result code when: 1. The line speed is 1200 bps and the modem has been instructed to report the line speed to the PC upon connecting, or 2. The PC speed is 1200 bps and the modem has been instructed to report the PC speed to the PC upon connecting. (Also, see the W command.) 6- NO DIALTONE For X2 and X4, the modem sends this result code if it has been instructed to wait for dial tone during dialing but none is received. 7- BUSY For X3 and X4, if busy tone detection is enforced, the modem sends this result code when attempting to originate a call if the busy (engaged) signal is detected on the line. 8- NO ANSWER The modem sends this result code when attempting to originate a call if a continuous ringback signal is detected on the line until the expiration of the timer S7. 9- CONNECT 0600 For X1, X2, X3, and X4, the modem sends this result code when: 1. The line speed is 600 bps and the modem has been instructed to report the line speed to the PC upon connecting, or 2. The PC speed is 600 bps and the modem has been instructed to report the PC speed to the PC upon connecting. 10- CONNECT 2400 For X1, X2, X3, and X4, the modem sends this result code when: 1. The line speed is 2400 bps and the modem has been instructed to report the line speed to the PC upon connecting, or 2. The PC speed is 2400 bps and the modem has been instructed to report the PC speed to the PC upon connecting. 11- CONNECT 4800 For X1, X2, X3, and X4, the modem sends this result code when the PC speed is 4800 bps and the modem has been instructed to report the PC speed upon connecting. 12- CONNECT 9600 For X1, X2, X3, and X4, the modem sends this result code upon connecting when the PC speed is 9600 bps and the modem has been instructed to report the PC speed to the PC upon connecting. 13- CONNECT 7200 For X1, X2, X3, and X4, the modem sends this result code upon connecting when the PC speed is 7200 bps and the modem has been instructed to report the PC speed to the PC upon connecting. 14- CONNECT 12000 For X1, X2, X3, and X4, the modem sends this result code upon connecting when the PC speed is 12000 bps and the modem has been instructed to report the PC speed to the PC upon connecting. 15- CONNECT 14400 For X1, X2, X3, and X4, the modem sends this result code upon connecting when the PC speed is 14400 bps and the modem has been instructed to report the PC speed to the PC upon connecting. 16- CONNECT 19200 For X1, X2, X3, and X4, the modem returns this result code upon connecting when the PC speed is 19200 bps and the modem has been instructed to report the PC speed upon connecting. 17- CONNECT 38400 For X1, X2, X3, and X4, the modem sends this result code upon connecting when the PC speed is 38400 bps and the modem has been instructed to report the PC speed to the PC upon connecting. 18- CONNECT 57600 For X1, X2, X3, and X4, the modem sends this result code upon connecting when the PC speed is 57600 bps and the modem has been instructed to report the PC speed to the PC upon connecting. 19- CONNECT 115200 For X1, X2, X3, and X4, the modem sends this result code upon connecting when the PC speed is 115200 bps and the modem has been instructed to report the PC speed to the PC upon connecting. 22- CONNECT 75TX/1200RX For X1, X2, X3, and X4, the modem returns this result code upon establishing a V.23 originate connection when the modem has been instructed to report the modem speed upon connection. 23- CONNECT 1200TX/75RX For Xl, X2, X3, and X4, the modem returns this result code upon establishing a V.23 answer connection when the modem has been instructed to report the modem speed upon connection. 24- DELAYED For X4, the modem returns this result code when a call fails to connect and the number dialed is considered 'delayed' due to country blacklisting requirements. 32- BLACKLISTED For X4, the modem returns this result code when a call fails to connect and the number dialed is considered 'blacklisted'. 33- FAX The modem returns this result code when a fax modem connection is established in a facsimile mode. 35- DATA The modem returns this result code when a data modem connection is established in a facsimile mode. 40- CARRIER 300 The modem returns this result code when either a V.21 or Bell 103 carrier has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.) 44- CARRIER 1200/75 The modem sends this result code when the V.23 backward channel carrier has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.) 45- CARRIER 75/1200 The modem sends this result code when the V.23 forward channel carrier has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.) 46- CARRIER 1200 The modem sends this result code when either the high or low channel carrier in either V.22 or Bell 212 mode has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.) 47- CARRIER 2400 The modem sends this result code when either the high or low channel carrier in V.22 bis mode has been detected on the line, and carrier reporting has been enabled. (See S95 and Xn.) 48- CARRIER 4800 The modem sends this result code when the 4800 bps data rate in V.32 bis or V.32 mode has been detected on the line, and carrier reporting has been enabled. (See S95 and Xn.) 49- CARRIER 7200 The modem sends this result code when the 7200 bps data rate in V.32 bis mode has been detected on the line, and carrier reporting has been enabled. (See S95 and Xn.) 50- CARRIER 9600 The modem sends this result code when the 9600 bps data rate in V.32 bis or V.32 mode has been detected on the line, and carrier reporting has been enabled. (See S95 and Xn.) 51- CARRIER 12000 The modem sends this result code when the 12000 bps data rate in V.32 bis mode has been detected on the line, and carrier reporting has been enabled. (See S95 and Xn.) 52- CARRIER 14400 The modem sends this result code when the 14400 bps data rate in V.32 bis mode has been detected on the line, and carrier reporting has been enabled. (See S95 and Xn.) 53- CARRIER 16800 The modem sends this result code when the 16800 bps data rate in V.FC mode has been detected on the line, and carrier reporting has been enabled. (See S95 and Xn.) 54- CARRIER 19200 The modem sends this result code when the 19200 bps data rate in V.FC mode has been detected on the line, and carrier reporting has been enabled. (See S95 and Xn.) 55- CARRIER 21600 The modem sends this result code when the 21600 bps data rate in V.FC mode has been detected on the line, and carrier reporting has been enabled. (See S95 and Xn.) 56- CARRIER 24000 The modem sends this result code when the 24000 bps data rate in V.FC mode has been detected on the line, and carrier reporting has been enabled. (See S95 and Xn.) 57- CARRIER 26400 The modem sends this result code when the 26400 bps data rate in V.FC mode has been detected on the line, and carrier reporting has been enabled. (See S95 and Xn.) 58- CARRIER 28800 The modem sends this result code when the 28800 bps data rate in V.FC mode has been detected on the line, and carrier reporting has been enabled. (See S95 and Xn.) 59- CONNECT 16800 For X1, X2, X3, and X4, the modem returns this result code upon connecting when the PC speed is 16800 bps and the modem has been instructed to report the PC speed upon connecting. 61- CONNECT 21600 For X1, X2, X3, and X4, the modem returns this result code upon connecting when the PC speed is 21600 bps and the modem has been instructed to report the PC speed upon connecting. 62- CONNECT 24000 For X1, X2, X3, and X4, the modem returns this result code upon connecting when the PC speed is 24000 bps and the modem has been instructed to report the PC speed upon connecting. 63- CONNECT 26400 For X1, X2, X3, and X4, the modem returns this result code upon connecting when the PC speed is 26400 bps and the modem has been instructed to report the PC speed upon connecting. 64- CONNECT 28800 For X1, X2, X3, and X4, the modem returns this result code upon connecting when the PC speed is 28800 bps and the modem has been instructed to report the PC speed upon connecting. 66- COMPRESSION: CLASS 5 This message is sent to the PC when the modem has connected in MNP Class 5 and COMPRESSION message reporting has been enabled. (See S95 and Xn.) 67- COMPRESSION: V.42bis This message is sent lo the PC when the modem has connected in V.42 bis and COMPRESSION message reporting has been enabled. (See S95 and Xn.) 69- COMPRESSION: NONE This message is sent to the PC when the modem has connected without data compression and COMPRESSION message reporting has been enabled. (See S95 and Xn.) 70- PROTOCOL: NONE This message is sent to the PC when the modem has connected without any form of error correction, and the PROTOCOL message reporting has been enabled. (See S95 and Xn.) 77- PROTOCOL: LAPM This message is sent to the PC when the modem has connected in the V.42 LAPM mode of error correction, and PROTOCOL message reporting has been enabled. (See S95 and Xn.) 80- PROTOCOL: ALT This message is sent to the PC when the modem has connected in the MNP mode of error correction, and PROTOCOL message reporting has been enabled. (See S95 and Xn.) +F4- FCERROR This message is sent to the DTE when high speed fax data (V.27, V.29, V.33, or V.17) is expected and a V.21 signal is received. (ALL-04/07/95)