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Fax dial-out codes

OfficeJet 5740
Microsoft Windows 10 (64-bit)

I have just hooked up my 5740 in my office and am trying to send a fax, but I keep getting various error codes such as 349, 346, etc.  I've read all the articles and posts about communications errors, bad phone lines, etc.  One thing I am trying to do is to temporarily suspend Call Waiting.  On my system, I do this by entering the prefix *70.  I've entered this into the DIAL PREFIX field in my Fax Settings.  However, this code alone does not tell the fax machine to wait for second dial tone or wait 2 seconds before continuing to dial, and I do not see any way of inputting such codes.  I recall that all fax machines used to have this functionality, usually with a W for Wait for Second Dial Tone or a * for Wait 2 seconds.  


Can someone tell me how to tell my 5740 to Wait after dialing *70 before dialing the rest of the number? 

HP Support Agent
HP Support Agent
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Fax dial-out codes



Welcome to HP support community.


Turn off the error correction mode in fax settings

1. From the printer control panel display, touch Setup .

2. Touch Fax Setup .

3. Touch Preferences .

4. Scroll to Error Correction Mode and touch to turn the feature off.


Refer this HP document for more assistance:- Click here


Let me know how it goes.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.



I am an HP Employee

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