HP LaserJet Enterprise MFP M630 LaserJet Analog Fax Accessory 500 - Fax Guide - Page 127

In rare cases, if errors persist, turn off ECM on the product. The image quality might decrease.

Page 127 highlights

The transmission of the information on the Internet is done digitally instead of analog. Therefore, there are different constraints on the fax transmission that may require different fax settings than the analog Public Switched Telephone Network (PSTN). Fax is very dependent upon timing and signal quality, so a fax transmission is more sensitive to a VoIP environment. The following are suggested changes in settings for the HP LaserJet Analog Fax Accessory 500 when it is connected to a VoIP service: ● Start off with the fax set in V.34 (Fast) mode and with Error Correction Mode (ECM) turned on. The V.34 protocol handles any changes in transmission speed needed to accommodate VoIP networks. ● If numerous errors or retries occur with the unit set to V.34, set V.34 Off and set speed to Medium (14,400 bps). ● If errors and retries persist, set a lower fax speed as some VoIP systems cannot handle the higher signal rates associated with fax. Set the Maximum Baud Rate to 9,600 bps (Slow). ● In rare cases, if errors persist, turn off ECM on the product. The image quality might decrease. Ensure that the image quality is acceptable with ECM off before using this setting. If having the ECM turned off eliminates errors, set the speed to 14,400 bps to get a faster transmission speed, and potentially better error rate. ● If the preceding setting changes have not improved the VoIP fax reliability, contact your VoIP provider for help. ENWW Use fax 115

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The transmission of the information on the Internet is done digitally instead of analog. Therefore,
there are different constraints on the fax transmission that may require different fax settings than the
analog Public Switched Telephone Network (PSTN). Fax is very dependent upon timing and signal
quality, so a fax transmission is more sensitive to a VoIP environment.
The following are suggested changes in settings for the HP LaserJet Analog Fax Accessory 500 when it is
connected to a VoIP service:
Start off with the fax set in V.34 (Fast) mode and with Error Correction Mode (ECM) turned on.
The V.34 protocol handles any changes in transmission speed needed to accommodate VoIP
networks.
If numerous errors or retries occur with the unit set to V.34, set V.34 Off and set speed to
Medium (14,400 bps).
If errors and retries persist, set a lower fax speed as some VoIP systems cannot handle the
higher signal rates associated with fax. Set the Maximum Baud Rate to 9,600 bps (Slow).
In rare cases, if errors persist, turn off ECM on the product. The image quality might decrease.
Ensure that the image quality is acceptable with ECM off before using this setting. If having the
ECM turned off eliminates errors, set the speed to 14,400 bps to get a faster transmission
speed, and potentially better error rate.
If the preceding setting changes have not improved the VoIP fax reliability, contact your VoIP
provider for help.
ENWW
Use fax
115