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#640469 03/23/21 09:21 AM
Joined: Feb 2019
Posts: 22
MJonas Offline OP
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Joined: Feb 2019
Posts: 22
We are using SIP Carrier for ourside line that supports FAX T.38 option.
The FAX T.38 option is activated per standard in officeserv and MGI/OAS Card.

We tried to send several faxes but it does not work very well. I don't know if Officeserve is using the T.38 standard.

The question is: how does officeserv know that we are sending a fax or when to switch over to T.38. I didn't find any setting.

Thank you

Jonas

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MJonas #640471 03/23/21 07:50 PM
Joined: Jun 2006
Posts: 2,880
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The system and your sip provider should auto negotiate t.38 when they detect fax tones.
You may need to use g711 for your codec rather than g729

Fax over ip I found to be unreliable. We always converted them to vfax (email based send/receive) if the carrier supported it.


Moderated by  nameless, pvj 

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