2RING

The modem sends this result code when incoming ringing is detected on the line.

3NO 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 autodisconnects 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.

4ERROR

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.

6NO DIAL TONE

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.

7BUSY

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.

8NO ANSWER

The modem sends this result code when attempting to originate a call if the @ dial modifier is used and the modem does not detect silence before the expiration of the timer S7.

5, 10-15, and 24-33 Connect Rate (see Table 6, page 10 for rate) For X1, X2, X3, and X4, the modem sends this result code when:

1.The line speed is the speed following the connect and the modem has been instructed to report the line speed to the DTE upon connecting by the W2 command.

2.The DTE speed is 2400 bits/s and the modem has been instructed to report the DTE speed to the DTE upon connecting using the W0 command.

Appendix F

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Digi 90031300 manual Ring