Fax File Sending Failure

Possible Cause

The V21 timer is incorrectly set.

Solution

1. Check the setting of the V21 timer. The V21 timer of different models can be checked as follows:
   • For the IAD208E(M) and IAD132E(T), choose Advanced Configuration > User Port Attribute, or run the display pstnport attribute command to check the setting of the V21 timer. Generally, the value is set to 10 seconds. If the IAD can detect the signals sent from the timer in 10 seconds, the fax process starts. If the IAD fails to detect signals in 10 seconds, the modem service process starts.
   • For the IAD1224, choose Advanced Configuration > Setting the Fax Parameters, or run the display dsp fax-tone command to check the setting of the V21 timer. Generally, the value is set to 500 ms. If the IAD receives signals sent from the timer within 5 seconds, the fax process starts. If the IAD fails to detect signals in 5 seconds, the modem service starts.

2. If the configuration is incorrect, adjust the setting as follows:
   • For the IAD208E(M) and IAD132E(T), choose Advanced Configuration > User Port Attribute and adjust the V21 timer setting on the displayed page, or run the pstnport attribute set command to adjust the setting.
   • For the IAD1224, choose Advanced Configuration > Setting the Fax Parameters and adjust the V21 timer setting on the displayed page, or run the dsp fax-tone set command to check the setting.

3. Check whether the fault is rectified.
   • If yes, the procedure ends.
   • If no, go to Step 4

4. Contact your service provider for assistance.