Use Fax over VoIP networks
VoIP technology converts the analog phone signal into digital bits. These are then assembled into packets
which travel on the Internet. The packets are converted and transmitted back to analog signals at or near the
destination.
Transmission of information on the Internet is digital instead of analog. Therefore, there are different
constraints on the fax transmission that might 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:
●
Begin with the fax speed set in Medium (V.17). This might be helpful in environments where a new VoIP
networks is in use.
●
If numerous errors or retries occur with the fax speed set to Fast, set it to Medium (V.17).
●
If errors and retries persist, set the fax speed to Slow (V.29) because some VoIP systems cannot handle
the higher signal rates associated with fax.
●
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 the preceding setting changes have not improved the VoIP fax reliability, contact your VoIP provider
for help.
ENWW Solve fax problems (M680) 515
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