Troubleshooting
Problem
This document outlines the steps to take to turn Error Correction Mode (ECM) on for Facsimile Support.
Resolving The Problem
Error Correction Mode (ECM) helps with fax transmissions, especially those that have line noise. It forces fax machines to handshake after every 256 frames of data and step down to lower baud rates, if necessary.
Note: The receiving fax machine must also support ECM.
The ECM setting is on the Add Fax Card (ADDFAXCRD) command. There is not a way to update the current fax card configuration so it is necessary to remove the fax card using the Remove Fax Card (RMVFAXCRD) command and re-add it using the ADDFAXCRD command.
Do the following:
| 1. | End Facsimile Support: ENDFAXSPT FAXD(*ALL) and press <ENTER> Verify that the QFAXSBS subsystem ends. |
| 2. | Use the Print Fax Configuration (PRTFAXCFG) command to generate a spooled file with the current configuration information. Note: The output from the PRTFAXCFG command does not show if a prefix telephone number had been configured. Use the DSPPFM FILE(QUSRSYS/QAFFCFG) MBR(FaxControllerName) command to view the current fax configuration. Column 100 on the third line identifies the prefix number if it was configured. For more information, please refer to the following Technote: N1014039: Determining if the Fax Card Is Auto-Dialing a Prefix |
| 3. | Remove the fax card: RMVFAXCRD FAXD(FaxControllerName) FAXCRD(FAX1) |
| 4. | Add the fax card, setting the Error Correction Mode parameter to *ON. Use the information collected in step 2 to determine the other values to use: ADDFAXCRD FAXD(FaxControllerName) ECM(*ON) |
| 5. | Repeat Steps 3 and 4 for each controller / fax card that must be changed. |
| 6. | Start Facsimile Support: STRFAXSPT FAXD(FaxControllerName(s)) |
For more information on the QAFFCFG file, please refer to the following Technote:
N1016096: Configuration File (QAFFCFG) Information
Historical Number
30924318
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Document Information
Modified date:
18 December 2019
UID
nas8N1019281