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Brother MFC-J491DW User Manual

Brother MFC-J491DW
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Home > Fax > Telephone Services and External Devices > Voice Over Internet Protocol (VoIP/Telephone
Line Interference)
Voice Over Internet Protocol (VoIP/Telephone Line Interference)
VoIP is a type of phone system that uses an Internet connection instead of a traditional telephone line. Telephone
providers frequently bundle VoIP together with Internet and cable services.
Your machine may not work with some VoIP systems. To use your machine to send and receive faxes on a VoIP
system, connect one end of your telephone cord to the jack labeled LINE on your machine. Connect the other
end of the telephone cord to a modem, interface box, phone adapter, splitter, or other such device.
If you have questions about how to connect your machine to the VoIP system, contact your VoIP provider.
After you have connected your machine to the VoIP system, press the Hook button to verify the machine has a
dial tone. If the machine does not have a dial tone, call your VoIP provider.
If you are having problems sending or receiving faxes over a VoIP system, we recommend changing the
machine’s modem speed to the [Basic(for VoIP)] setting.
Related Information
Telephone Services and External Devices
Telephone Line Interference/VoIP
270

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Brother MFC-J491DW Specifications

General IconGeneral
DisplayLCD
Product colorBlack
Built-in displayYes
Display diagonal1.77 \
Market positioningHome & office
Internal memory128 MB
Card reader integratedNo
Sound pressure level (copying)50 dB
Print technologyInkjet
Maximum resolution1200 x 6000 DPI
Duplex printing modeAuto
Print speed (ISO/IEC 24734) mono12 ipm
Print speed (ISO/IEC 24734) color6 ipm
Time to first page (black, normal)8 s
Duplex print speed (ISO/IEC 24734) mono3 ipm
Duplex print speed (ISO/IEC 24734) color1.7 ipm
Print speed (black, normal quality, A4/US Letter)27 ppm
Print speed (color, normal quality, A4/US Letter)10 ppm
Standard interfacesUSB 2.0, Wireless LAN
USB 2.0 ports quantity1
Copier resize25 - 400 %
Maximum copy resolution1200 x 600 DPI
Package depth249 mm
Package width447 mm
Package height457 mm
Package weight10100 g
Power consumption (off)0.2 W
Power consumption (sleep)1 W
Power consumption (standby)3.5 W
Power consumption (printing)16 W
Power consumption (average operating)- W
Sustainability certificatesNordic Swan Ecolabel, ENERGY STAR
FaxingMono faxing
Fax memory170 pages
Modem speed14.4 Kbit/s
Wi-Fi standards802.11b, 802.11g, Wi-Fi 4 (802.11n)
Security algorithms64-bit WEP, 128-bit WEP, WPA-PSK, WPA2-PSK
Mobile printing technologiesApple AirPrint, Mopria Print Service
Paper input typePaper tray
Total input capacity100 sheets
Total output capacity50 sheets
Auto document feeder (ADF) input capacity20 sheets
Paper tray media typesPlain paper
Borderless printing media sizesA4
Scan toE-mail, File, Image, OCR
Scanner typeFlatbed & ADF scanner
Input color depth30 bit
Output color depth24 bit
Maximum scan resolution19200 x 19200 DPI
Optical scanning resolution1200 x 2400 DPI
Digital sender-
Maximum duty cycle- pages per month
Harmonized System (HS) code84433100
Weight and Dimensions IconWeight and Dimensions
Depth341 mm
Width400 mm
Height172 mm

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